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151	Other related Topics	ABS-44
Non-Markovian entanglement dynamics of three independent qubit within atomic-cavity system Vincentius A Wasesatama, Jusak S Kosasih and Wahyu Hidayat Theoretical and High Energy Physics Research Division, Department of Physics, Faculty of mathematics and Natural Sciences, Institut Teknologi Bandung, Jl.Ganesha 10 Bandung 40132, INDONESIA Abstract All realistic quantum systems will interact with their environments. This fact presents challenges to the implementation of quantum systems for practical systems. One of the most important quantum resources is the implementation of entanglement. In this paper, we investigate the interplay between the effects of noisy environments and the dynamics of entanglement. The open quantum system model that will be used is cavity quantum electrodynamics (CQED) with three-qubit interacting independently with a variation of environmental model. We use master equation to describe the dynamics of the open quantum system and a lower bound concurrence, \(C_{LBC}\), to measure the entanglement of tripartite qubit. We derive the exact dynamics of each model and use \(C_{LBC}\) method proposed by Li et.al to visualize entanglement dynamics. By adjusting the environmental parameters, we also found revivals and dark-periods of entanglement which are unique to non-Markovian processes. Keywords: Concurrence- CQED- Entanglement Dynamics- Non-Markovian- Open Qubit Systems Share Link | Plain Format | Corresponding Author (Vincentius Aryo Wasesatama)

152	Other related Topics	ABS-45
Entanglement dynamics of non-linearly coupled spin-boson model using hierarchical equation of motion approach Vincentius A Wasesatama, Jusak S Kosasih and Wahyu Hidayat Theoretical and High Energy Physics Research Division, Department of Physics, Faculty of mathematics and Natural Sciences, Institut Teknologi Bandung, Jl.Ganesha 10 Bandung 40132, INDONESIA Abstract One of the most intensively studied issues in the field of open quantum systems is the spin-boson model. In this paper, we consider an extension of the spin-boson model with non-linear coupling of interaction. We solve the entanglement dynamics of two independent spin quadratically coupled with a bath of harmonic oscillators, using numerically ^exact^ approach of hierarchical equations of motion (HEOM). Without Markovian approximation, generalized influence functional formulation by Hu et.al is used to describe the environmental effect of noisy quadratic bath in high-temperature regime. Wotters concurrence is then applied to numerically solved reduced density matrix to visualize entanglement dynamics. By adjusting the environmental parameters, we vary the degree of non-markovianity and found the elongated time of entanglement. Keywords: Entanglement Dynamics- HEOM- Non-Markovian- Open Quantum Systems- Spin-Boson Share Link | Plain Format | Corresponding Author (Vincentius Aryo Wasesatama)

153	Other related Topics	ABS-83
Study of Eclipsing Binary Physical Parameters. Case: CV Boo Aliyya Nur Rahma (a*), Mahasena Putra (a,b), Muhamad Irfan Hakim (a,b), Aprilia (a,b), Yayan Sugianto (a,b) (a) Astronomy Study Program, Faculty of Mathematics and Natural Science, Institut Teknologi Bandung, Indonesia * aliyyanurr[at]gmail.com (b) Bosscha Observatory, Faculty of Mathematics and Natural Science, Institut Teknologi Bandung, Indonesia Abstract Eclipsing binary is a binary system in which the components are seen eclipsing each other from the Earth. Photometric and spectroscopic observation of eclipsing binaries show variation of their brightness (light curve) and radial velocity (velocity curve). Light and radial velocity curve analysis provide physical and geometrical parameters of the binary systems and their components, which is very important in stellar evolution studies, especially in the era of multi-wavelength surveys. These parameters are determined by solving inverse problem, i.e. finding the best-fitting model to the observational curves. Modern numerical models includes detailed physics of stellar atmosphere, geometry, and dynamics of the binary system. One of such models is PHOEBE (PHysics Of Eclipsing BinariEs) 2.3, which offers sophisticated methods to solve the inverse problem. It is solved by computing model curves from initial (estimated) parameters, optimizing them numerically, and sampling the optimized models. We studied CV Boo, a detached eclipsing binary with a period of 0.874 days, using PHOEBE 2.3. Light curve and radial velocity curves were obtained from the literature. Our best solution of the inverse problem in this study are \(q=0.9872\substack{+0.0005 \\ -0.0005}\), \(T{\textrm{s}}/T_{\textrm{r}}=0.9682\substack{+0.0010 \\ -0.0015}\), \((R{\textrm{p}}+R_{\textrm{s}})/a=0.5000 \substack{+0.0010\\-0.0013}\), \(\omega=85.36\substack{+0.13\\-0.13}\) deg, \(e=0.0101\substack{+0.0004\\-0.0003}\), \(i=91.891\substack{+0.073\\-0.07}\) deg. We discuss the steps in finding the solution and the results in this paper. Keywords: (Stars:) binaries: eclipsing -- Stars: fundamental parameters -- Methods: Numerical, observational, statistical Share Link | Plain Format | Corresponding Author (Aliyya Nur Rahma)

154	Physics Education	ABS-2
Review of Learning Result of The Physics Base on SSCS (Search, Solve, Create, and Share) Model in Terms of Critical Thinking Skills Qatrunnada Salsabila Putri (a*), Suharno (b), Sri Budiawanti (b) a) Postgraduate Student of Physics Education, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta, Indonesia *qatrunnadaspd[at]student.uns.ac.id b) Physics Education Department, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta 57126, Indonesia Abstract Physics is one of the lessons that play a role in society 5.0. In this era, students must have critical thinking skills to master and develop the technology. Mastery of basic knowledge is needed in technology development. SSCS is a learning model that can improve critical thinking skills. The SSCS model has four stages: search, problem-solving (solve), create, and share. At the search stage, students are taught to understand the problem. Next, students make a plan to solve the problem. In the next step, students build a solution from the problem-solving strategy that has been arranged in the previous stage. Finally, the solutions that have been constructed are disseminated and evaluated for continuous improvement. The purpose of this paper is to provide a comprehensive description of the development of the SSCS model, especially in physics learning that has been carried out to improve critical thinking skills. Keywords: Learning result- SSCS model- Critical thinking Share Link | Plain Format | Corresponding Author (Qatrunnada Salsabila Putri)

155	Physics Education	ABS-57
STEM Project Topics Relevant to the Physics Curriculum at High School Level Kurnia Ika Pangesti, Triyanta Institut Teknologi Bandung Abstract The scientific process is conducted through investigative activities ranging from simple investigations of the surrounding nature to more complicated investigations to predict natural phenomena and find solutions to various problems. Science learning should be carried out with a scientific approach that emphasizes scientific processes in which interaction with technology, environment, and other fields of science could not be avoided. Science learning through a STEM education approach is among approaches that are world-widely suggested, including in Indonesia, as can be seen in the national curriculum focal points. Unfortunately, as far as our knowledge is concerned, there are no such guide for teachers in implementing STEM education, including suggestion on what are the real issues and topics of STEM project related to those issues. In this paper, based on a study of the content of the physics curriculum at the high school level, we propose real problems related to physics content and possible STEM project topics derived from these real problems. We emphasize topics that are technologically simple and easy to implement nationally including in remote areas, but pedagogically contain rich aspects of learning. Keywords: STEM education- K-13 Curriculum- Physics Share Link | Plain Format | Corresponding Author (Kurnia Ika Pangesti)

156	Physics Education	ABS-86
Prototype of Micro Hydro Power Plant as STEM-Based Experiment Media in Learning Physics Hayatining Suci Abdilah1,2,*, Fatimah Arofiati Noor2,+, Khairurrijal Khairurrijal1,2,# 1Master Program in Teaching Physics, Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Indonesia 2Physics of Electronic Materials Research Division, Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, Indonesia e-mail: *hayatiningsuciabdilah[at]gmail.com, +fatimah[at]fi.itb.ac.id, #krijal[at]fi.itb.ac.id Abstract The challenges of twenty-first century require students to have twenty-first century skills. Based on the PISA results, it has been found that Indonesian students have low critical thinking and problem-solving skills. One learning model that allow the practice of twenty-first century skills is STEM teaching and learning, but the limitations of learning media are an obstacle to implementing this learning model. To support the skill needs and the achievement of competencies in the current curriculum, it is necessary to develop STEM-based learning media. This can help students to improve critical thinking skills, the ability to apply theories and analyze local knowledge. In this study, we developed a prototype of a micro hydro power plant (MHP) as learning media that can be used in teaching physics. The study investigated concepts of physics that can be taught and experiments that can be done using the learning media. The concepts of physics that can be taught with this media include rotational mechanics, dynamic fluids, energy and its conversion, and renewable energy sources. In the experiment, students can observe and analyze the effect of height on the electrical energy produced and look for the system efficiency for two different number of blades of the turbines and their effect on the energy produced. Keywords: STEM learning, prototype, micro hydro power plant, learning media, physics, energy, renewable energy Share Link | Plain Format | Corresponding Author (Hayatining Suci Abdilah)

157	Physics Education	ABS-128
Building a Science Kit of Faradays Law with Free Fall Motion Method Selvy Lutfiana, Pujayanto, Fairusy Fitria Haryani Universitas Sebelas Maret Abstract The aim of this study is to build a science kit of Faradays Law with free fall motion method. The magnetic flux comes from several neodymium magnets and the coil is made of copper. The moving magnet falling through the coil causes a change in the magnetic flux and produces an induced emf. The data analysis technique used in this research are graphical method and analysis of Faraday^s Law equations with another supporting equations. Based on the results of this study, the conclusion is the induced emf value is proportional with the change of the magnetic flux and also proportional with the turn number of coil, so that it can be obtained the mathematical equation of Faraday^s Law emf=N d(fluks)/dt Keywords: science kit, Faradays Law, free fall motion method Share Link | Plain Format | Corresponding Author (SELVY LUTFIANA)

158	Theoretical High Energy Physics	ABS-12
The Relative Entropy of One Graviton Creation in Early Universe Anom Trenggana (a*), Freddy P. Zen (a,b) a) Theoretical Physics Laboratory, THEPI Division, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, West Java, Indonesia *gstanomagung[at]gmail.com b) Indonesian Center for Theoritecal and Mathematical Physics (ICTMP), Jl. Ganesha 10 Bandung 40132, West Java, Indonesia Abstract The detection of nonclassicality of primordial gravitational waves (PGWs) is one way to prove the quantum theory of gravity. The nonclassical feature can be seen as a non-gaussianity, that could happen if there is a graviton creation in a squeezed state of Bunch-Davies vacuum. This condition would also produce an entanglement state. In this paper, that non-gaussianity is studied by using relative entropy as a measurement. For the simplest state (one graviton creation), we find that non-gaussianity would only appear on the small squeezed parameter and the entanglement would only take an effect in this condition. For a large squeezed parameter the relative entropy always comes to zero, even in the presence of matter fields the zero value still exists. Keywords: Non-gaussianity- Relative entropy- Graviton Share Link | Plain Format | Corresponding Author (I Gusti Agung Anom Trenggana Dharastika)

159	Theoretical High Energy Physics	ABS-14
Nonequilibrium fractional quantum transport with long-range interactions Donny Dwiputra(1), Freddy Permana Zen (1,2) 1) Institut Teknologi Bandung, Jl. Ganesha 10 Bandung, Indonesia. 2) Indonesian Center for Theoretical and Mathematical Physics, Indonesia. Abstract We investigate how long-range power-law hopping interaction, \(1/r^a\), affects the characteristics of dissipative quantum transport in a nonequilibrium setting. The model under consideration is a noninteracting bosonic chain subject to thermal baths of differing temperature at its boundaries and dephasing noise which is applied uniformly to all the sites. It is shown that the equation of motion under the continuum limit can be transformed to contain the Riesz fractional derivative of order \(a\). The fractional nature of the system, along with the interplay between coherent and incoherent transport will affect the steady state current, which characterizes the transport. Keywords: Open quantum systems, quantum transport, nonequilibrium, Lindblad equation Share Link | Plain Format | Corresponding Author (Donny Dwiputra)

160	Theoretical High Energy Physics	ABS-18
Possible signature of entanglement in null-energy-condition-violating inflation Hadyan Luthfan Prihadi [1] and Freddy Permana Zen [1,2] [1] Theoretical Physics Division, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia [2] Indonesia Center for Theoretical and Mathematical Physics (ICTMP), Jl. Ganesha 10 Bandung 40132, Indonesia Abstract In recent years, the classical version of the null energy condition (NEC) has been enhanced into its quantum generalization, the quantum null energy condition (QNEC). The right-hand side of the QNEC inequality is non-zero. It is multiplied by a factor of \(\hbar\) and recovers the standard NEC in the classical limit. Moreover, the second derivative of entanglement entropy also plays a role in determining the right-hand side. In this work, we study several examples of theories of inflation that violate the standard NEC, yet still, possibly obey the QNEC. This suggests that the deviation of the standard NEC arises due to the existence of entanglement between regions inside and outside of the cosmological horizon. Possible connection to quantum fluctuations of de Sitter spacetime is also studied. Keywords: Cosmology, Entanglement, Inflation, Quantum Gravity Share Link | Plain Format | Corresponding Author (Hadyan Luthfan Prihadi)

161	Theoretical High Energy Physics	ABS-21
Analysis of Gravitational Waves from Inflation Model with Minimal, Non-minimal, and Non-Minimal Derivative Coupling of Scalar Field from Horndeski Theory M Zhahir Djogama (a*), Getbogi Hikmawan (a), Freddy P Zen (a,b) a) Theoretical Physics Laboratory, THEPI Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, West Java, Indonesia *zhahirdjo[at]gmail.com b) Indonesia Center for Theoritecal and Mathematical Physics (ICTMP), Jl. Ganesha 10 Bandung 40132, West Java, Indonesia Abstract Inflation theory provides solutions for problems in cosmology, such as horizon problem and flatness problem. Gravitational waves production in cosmic inflation era is caused by tensor perturbation in that era. The study of observational signatures of this gravitational waves provide not only a way to probe the general inflation theory, but also to discriminate in detail among specific models. In this paper, we use inflation model with minimal, non-minimal, and non-minimal derivative coupling of scalar field without potential from Horndeski Theory. From this model, we calculate scalar and tensor perturbation equations and then obtain its equation of gravitational waves, spectral indices for each perturbation mode and tensor-to-scalar ratio. Spectral indices and tensor-to-scalar ratio nearly scale-invariant and agree with observational data for some \(H_0\), \(\zeta\), and \(\xi\). Gravitational waves remain constant during inflation and start oscillates when its modes re-enter the horizon. Energy of this gravitational waves is scale-invariant for modes that re-enter horizon during radiation dominated era and rises toward lower frequencies. Keywords: Inflation- Gravitational waves- Modified gravity- Horndeski theory Share Link | Plain Format | Corresponding Author (M Zhahir Djogama)

162	Theoretical High Energy Physics	ABS-26
Thin-shell Solution of Chameleon Mechanism in Brans-Dicke Scalar-Tensor Model Azwar Sutiono, Agustina Widiyani, Marliana, Getbogi Hikmawan, Agus Suroso, Freddy P. Zen Institut Teknologi Bandung Abstract We investigated the chameleon screening mechanism in Brans-Dicke scalar-tensor theory. We kept the original idea of the standard chameleon mechanism that the field is massive where the density is high but is nearly free in the solar system, where the density is low. We found the thin-shell solution for a static and spherical symmetric body and showed the model^s relevance to the observations on a local scale. Keywords: Chameleon, screening mechanism, Brans-Dicke Share Link | Plain Format | Corresponding Author (Azwar Sutiono)

163	Theoretical High Energy Physics	ABS-27
Some Possible Schemes in Higher Dimensional Stationary Skyrme Blackhole Formulation Emir Syahreza Fadhilla, Bobby Eka Gunara, Ardian Nata Atmaja Theoretical High Energy Physics Research Division, Institut Teknologi Bandung, Jl. Ganesha10 Bandung 40132, Indonesia. Research Center for Physics, Indonesian Institute of Sciences (LIPI), Kompleks PUSPIPTEK Serpong, Tangerang 15310, Indonesia. Abstract In this article we present some possible ways on how to formulate a stationary blackhole in higher dimensional generalized Skyrme model with minimal gravitational coupling. We consider a generalized Skyrme action which includes all possibble higher order kinetic terms as the representations of all strain tensor invariants. Some possible spacetime ansatzs are mentioned, such as Myers-Perry metric and general higher dimensional axisymmetric metric with one rotation plane. Here, we find that there exist some Skyrme field ansatzs, obeying the same symmetries of the spacetime manifold, which lead to a diagonal strain tensor. Keywords: Higher dimension, Skyrme Model, Stationary Blackhole Share Link | Plain Format | Corresponding Author (Emir Syahreza Fadhilla)

164	Theoretical High Energy Physics	ABS-29
Compatibility of Einstein-Gauss-Bonnet Inflation Theory with Non-Minimal Derivative Coupling in the constant-roll Naufal Aulia Adam (a*), Getbogi Hikmawan (a), Freddy Permana Zen (a, b) a) Theoretical Physics Division, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia * naufal.auliadam[at]gmail.com b) Indonesia Center for Theoretical and Mathematical Physics (ICTMP), Jl. Ganesha 10 Bandung 40132, Indonesia Abstract Inflation is a theory in cosmology that explains that the early universe experienced a very fast expansion in a very short time and is able to explain some cosmological problems and the presence of gravitational waves generated during the inflation period. Based on the event GW170817, it was found that \(c_t^2=1\), which indicates that the speed of gravitational waves is nearly equal as the speed of light. This contradicts several modified theories of gravity, one of which is the Einstein-Gauss-Bonnet theory. This paper examines the compatibility of Einstein-Gauss-Bonnet inflation theory with the GW170817 phenomenon, with the addition of the Non-minimal derivative coupling term and the constant-roll approach and its characteristics. The formulation of observational quantities is carried out using Horndeski theory and Effective Field Theory with ADM formalism and the calculations are done numerically. The constant values are selected in such a way that the spectral index values and tensor-scalar ratios are close to the 2018 Planck data. The results found that this theory is compatible with GW170817 with the influence of Gauss-Bonnet term and constant-roll parameter \(\beta\) most dominant. Keywords: Inflation- Gravitational Waves- Einstein-Gauss-Bonnet Share Link | Plain Format | Corresponding Author (Naufal Aulia Adam)

165	Theoretical High Energy Physics	ABS-31
Constraining Modified Einstein-Gauss-Bonnet Inflation with GW170817 F Khairunnisa (a*), G. Hikmawan (a), F P Zen (a,b) (a) Theoretical Physics Laboratory, Department of Physics, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung,Indonesia *fkhairunnisa96[at]students.itb.ac.id (b) Indonesia Center for Theoretical and Mathematical Physics (ICTMP), Institut Teknologi Bandung, Jl. Ganesha 10 Bandung, 40132, Indonesia Abstract The GW170817 event manifests that gravitational wave velocity is close to the speed of light. As a result, several theories of gravity are no longer applicable, including Einstein-Gauss-Bonnet (EGB) inflation. However, a constraint equation could be applied so that the theory could produce a viable result. In this study, the EGB inflation is being extended by adding a non-minimal coupling (NMC) and a non-minimal derivative coupling (NMDC). Free parameters values were evaluated to obtained viability with observational indices. We use power law and exponential Gauss-Bonnet coupling functions. Each model provides observational values of \(n_s\) and \(r\) that are compatible with the observations and has its characteristic. It specifies the free parameter that controls the alteration of \(n_s\) and \(r\) values. The power-law model is controlled by the power \(m\) of the Gauss-Bonnet coupling function and the potential integration constant, \(V_2\). While the exponential model is controlled by the potential integration constant \(c\) and the power \(m\) of the exponential function. Some approximations do not hold true so that the models need to be rectified. Apparently, the rectified power-law model is violating null energy condition (NEC), so we also provide the non-violating NEC power-law model. Keywords: Einstein-Gauss-Bonnet- Inflation- Cosmology- Gravitational Wave- Effective Field Theory Share Link | Plain Format | Corresponding Author (Fitria Khairunnisa)

166	Theoretical High Energy Physics	ABS-37
An Interacting Dark Energy Model with Nonminimal Derivative Coupling in The Parameterized Post-Friedmannian Framework Agustina Widiyani1,2, Marliana1, Azwar Sutiono1,3, Getbogi Hikmawan1, Agus Suroso1,4, and Freddy P. Zen1,4 1Theoretical Physics Laboratory, THEPI Division, Department of Physics, Faculty of Mathematics and Natural Science, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia 2Department of Physics, Faculty of Science, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Jati Agung Lampung Selatan 35365, Indonesia 3Department of Physics, Universitas Hasanuddin, Makassar, 90425, Indonesia 4Indonesia Center for Theoretical and Mathematical Physics (ICTMP), Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia Abstract We study the parameterization of cosmological model that gravity is coupled nonminimally with derivatives of dark energy component in the form of scalar field. We follow the parameterized post-Friedmannian approach for interacting dark energy theories. We show how the big number of free functions can be reduced by limiting the certain assumptions to a few nonzero coefficients. We only consider the case that the dark sector contains at most second order in time derivatives of scalar fields and the metric. In this paper we demonstrate its use through a number of worked examples relevant to the current literature and classify models of interacting dark energy. Keywords: cosmological, gravity, nonminimal derivative coupling, dark energy, scalar field, the Parameterized post-Friedmannian Share Link | Plain Format | Corresponding Author (Agustina Widiyani)

167	Theoretical High Energy Physics	ABS-40
Semiclassical Approaches to the Hawking Temperatures of Radiating Kerr - Newman - Vaidya Black Holes Ahmad H. Salimi (a), Triyanta (a,b) (a) High Energy Theoretical Physics Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung Jalan Ganesha no.10, Bandung 40132 Indonesia (b) Indonesian Center for Theoretical and Mathematical Physics Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung Jalan Ganesha no.10, Bandung 40132 Indonesia Abstract In this research, the analysis of Hawking radiation on non-stationary black hole Kerr - Newman - Vaidya was determined through semiclassical approaches. The non-stationary term, that can be negative or positive, for this black hole corresponds to the change of mass with respect to time and radial coordinates. The negative value of non-stationary term implies the black hole radiates, but the positive value implies the black hole absorbs matter around it. Hawking temperature was derived using two methods, namely, the semiclassical methods and the Bekenstein - Hawking temperature formulation. The semiclassical methods that were used are radial null geodesic and complex path analysis. These three calculations gave the same results, meaning these semiclassical approaches can be used to determine the Hawking temperature of non-stationary black holes. The Hawking temperature is inversely proportional to the mass and non-stationary term. If the mass of the black hole is getting bigger, the temperature is getting smaller and vice versa. With these results, we concluded that the increasing of non-stationary term will cause decreasing radiation probability. Furthermore, the entropy of Kerr - Newman - Vaidya black hole was given by two formulations, which are the Bekenstein - Hawking formulation and in dynamical form by the black hole dynamics equation. The entropy formulations that were calcutated obey generalized second law of black holes. Keywords: Complex path method, Bekenstein - Hawking formulations, Hawking radiation, Kerr - Newman - Vaidya black holes, non-stationary term, particle emissions, radial null geodesic Share Link | Plain Format | Corresponding Author (Ahmad Salimi)

168	Theoretical High Energy Physics	ABS-43
The Study of Lindblad Equation, Entangled K-meson System, and Its Decoherence A Syahbana (a*), F P Zen (a,b), D Dwiputra (a) a) Theoretical Physics Laboratory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung, 40132, West Java, Indonesia *ahmadbaskarasyahbana[at]gmail.com b) Indonesia Center for Theoretical and Mathematical Physics (ICTMP), Jl. Ganesha 10 Bandung, 40132, West Java, Indonesia Abstract In this paper, Lindblad equation, entangled K-meson model according to Lindblad equation, and decoherence phenomenon in the system is studied. Lindblad equation is derived from microscopic dynamics and as a completely positive and trace-preserving (CPT) generator. Using Lindblad equation, dynamical equation of entangled K-meson system that interacts with the environment is obtained. We find that non-Hermitian Hamiltonian of the system makes the evolution of density matrix does not satisfy completely positive and trace preserving properties. We also find that purity of density matrix could be less than \(1/d\) which does not satisfy the property of purity. From the dynamical equation, parameters related to the decoherence of the system, decoherence parameter (\(\lambda\)) and effective decoherence parameter (\(\zeta\)), are determined. Using Standard Least-Squares method, we obtained \(\zeta=0,13\pm 0,865\). This result corresponds with reference result that uses effective variance method, \(\zeta=0,13\pm_{-0,15}^{+0,16}\), which corresponds with \(\lambda=(1,84\pm_{-2,17}^{+2,50})\times 10^{-12}\) MeV. The value of these parameters from the reference are relatively small which means the information from the system is relatively maintained. On the other hand, we find that the value of \(\lambda\) does not exactly correspond with the value of \(\zeta\). This could mean the experimental data used are not sufficient enough to measure \(\zeta\). Keywords: decoherence, K-meson, Lindblad equation, open quantum system Share Link | Plain Format | Corresponding Author (Abas Syahbana)

169	Theoretical High Energy Physics	ABS-50
Blow-up Dynamics of Higher Dimensional Klein-Gordon Equation with Nonminimal Coupling in Subcritical Case Mirda P. Wijayanto (1*) , Fiki T. Akbar (1,2), Bobby E. Gunara (1,2) 1) Theoretical High Energy Physics Research Group, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia} *mirda.prisma.wijayanto[at]students.itb.ac.id 2) Indonesian Center for Theoretical and Mathematical Physics (ICTMP), Jl. Ganesha 10 Bandung 40132, Indonesia Abstract The aim of this present work is to study the blow-up dynamics and lifespan estimate for solution to higher dimensional Klein-Gordon Equation in subcritical case, in which 1<p<p_{sc}. We construct the equation of motion from the Lagrangian of Klein-Gordon with non-minimal coupling, where the coupling interaction of the scalar field is proportional to the scalar curvature of the spacetime. The equation of motion has the form like nonlinear damped wave equation with mass. The novelty of this work is the time dependent of nonlinear term. We use test function method to proof the lifespan estimate. Keywords: Blow-up dynamics, Lifespan estimate, Nonlinear wave equation Share Link | Plain Format | Corresponding Author (Mirda Prisma Wijayanto)

170	Theoretical High Energy Physics	ABS-59
General Couplings Conditions of Four-Dimensional Maxwell-Klein-Gordon System Mulyanto (a*), Fiki Taufik Akbar (a,b), and Bobby Eka Gunara (a,b) (a) Theoretical High Energy Physics and Instrumentation Research Group, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung Jl. Ganesha no. 10 Bandung, Indonesia, 40132 (b) Indonesia Center for Theoretical and Mathematical Physics (ICTMP) *mulyanto[at]students.itb.ac.id Abstract In this paper, we study the conditions for the general gauge couplings of the Maxwell Klein Gordon system in four-dimensional Minkowski spacetime. With the general coupling turned on, we start with the Lagrangian for the multi-interaction between electromagnetic fields and complex scalar fields. The equation of motion is then derived in the form of a nonlinear wave equation. We obtained the general solution for the vector potential using the spherical means method. By considering the Coulomb gauge condition, we acquire the constraint for the couplings and the internal manifold metrics, which are critical in proving the global existence of the solution Keywords: Scalar Wave Equation, General Coupling, Coulomb Gauge Share Link | Plain Format | Corresponding Author (Mulyanto -)

171	Theoretical High Energy Physics	ABS-61
Cosmological Model in Minimal Theory of Mass-Varying Massive Gravity Ahmad Khoirul Falah(a*), Andy Octavian Latief(b), Husin Alatas(c,d), Bobby Eka Gunara(a,d) (a) Theoretical Physics Laboratory, Theoretical High Energy Physics Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha no. 10 Bandung, Indonesia, 40132. (*) akhoirulfalah94[at]students.itb.ac.id (b) Physics of Magnetism and Photonics Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha no. 10 Bandung, Indonesia, 40132. (c) Theoretical Physics Division, Department of Physics, IPB University (Bogor Agricultural University), Jl. Meranti, Kampus IPB Darmaga, Bogor 16680, Indonesia. (d) Indonesian Center for Theoretical and Mathematical Physics (ICTMP) Abstract It is well known that the unique ghost-free Lorentzian nonlinear massive gravity i.e. de Rham-Gabadadze-Tolley (dRGT) theory suffer from nonlinear instability in standard homogen and isotropic cosmology. An extension of dGRT theory so-called the mass-varying massive gravity (MVMG) be able to rescue from this issue by promoting extra dynamical scalar field with potential function play a role as graviton mass. On the other hand there is growing interest in minimal theory of massive gravity (MTMG) whose modifies number degree of freedom in equals to general relativity but background evolution equals to dRGT. Here, we propose a new modfied theory of massive gravity by combining two ideas in MVMG and MTMG, we call it minimal theory of mass-varying massive gravity (MTMVMG). In contrast with conventional MVMG where the graviton mass asymptotically approaches zero and become standard quintessence at late-times, we find that in MTMVMG can provide a good description both in massless and massive. In particular, we discuss MTMVMG under inflationary scenario where the extra scalar field is identified with the inflaton and calculate primordial scalar and tensor perturbations. Keywords: modified gravity, massive gravity, cosmological model. Share Link | Plain Format | Corresponding Author (Ahmad Khoirul Falah)

172	Theoretical High Energy Physics	ABS-63
Study of photon orbit around magnetic black holes coupled to nonlinear electrodynamics A S. Habibina, Handhika S. Ramadhan Department of Physics, FMIPA, University of Indonesia, Depok, Indonesia Abstract In this work we study the orbit of light particles around a asymptotically flat, magnetically charged black hole which is coupled to a model of nonlinear form of Maxwell electrodynamics. The matter source is characterized by two parameters, -\beta- and -\gamma-, which determine the behaviour of photon around the corresponding spacetime. We serve the effective potential and analyze its change by varying the charge and the model paramater. Finally, we solve its orbit equation and show how photon moves according to the black hole potential. Keywords: black holes, nonlinear electrodynamics, photon orbit Share Link | Plain Format | Corresponding Author (A Sayyidina Habibina)

173	Theoretical High Energy Physics	ABS-87
Numerical Analysis of Non-minimal Derivative Coupling and Non-minimal Coupling Theory using Monte Carlo Method Muhammad Baharuddin Rusyda (a*), Agus Suroso (a), Wahyu Hidayat (a) a) Theoretical Physics Laboratory, THEPI Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia *rusyda[at]students.itb.ac.id Abstract In this work, we studied classes of Horndeski theory, specifically the Non-minimal Derivative Coupling (NMDC) theory and Non-minimal Coupling theory, against the observation of gravitational waves using the numerical framework given by Arai and Nishizawa. The framework takes randomized set of parameters of the theory, filters results that disagree with the late-time evolution of the universe and the stability condition, and outputs observable quantities of gravitational waves that were then compared to the quantities obtained from observational data of gravitational waves detection. Preliminary analysis of approximately 2000 sets of parameters of the NMDC and Non-minimal coupling theories showed significant deviation of gravitational wave speed from the speed of light. Keywords: Gravitational waves- Modified gravity- Horndeski theory- Monte Carlo method Share Link | Plain Format | Corresponding Author (Muhammad Baharuddin Rusyda)

174	Theoretical High Energy Physics	ABS-104
Gravitational Wave Propagation for The Generalized Proca Theories Marliana(1,3) , Agustina Widiyani(1,2), Azwar Sutiono(1), Getbogi Hikmawan (1,4) , Agus Suroso(1,4) and Freddy P. Zen(1,4) (1)Theoretical Physics Laboratory, THEPI Division, Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia (2)Department of Physics, Faculty of Science, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Jati Agung Lampung Selatan 35365, Indonesia (3)Department of Physics Education, Sekolah Tinggi Keguruan dan Ilmu Pendidikan Surya, Jln Imam Bonjol 88 Tangerang (4)Indonesia Center for Theoretical and Mathematical Physics (ICTMP), Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia Abstract In general gravity, a gravitational wave propagates with the speed of light, while in the alternative theories of gravity, propagation speed could deviate from the speed of light due to the modification of gravity. Gravitational waves are influenced by modification gravity during propagation at the cosmological distance. In this paper, we investigate the propagation of a gravitational wave of the generalized Proca theories by considering gravitational wave as the gravitational field propagates in spacetime as a wave perturbing flat spacetime. We show that the arbitrary functions G3, G4, and G5 can be the sources of deviation of the speed of the gravitational wave. Keywords: gravitational wave, Proca theories, modified gravity Share Link | Plain Format | Corresponding Author (Marliana -)

175	Theoretical High Energy Physics	ABS-111
Inflation with Einstein-Gauss-Bonnet, Non-minimal, and Non-minimal Derivative Couplings: the constant-roll condition Izrul Supriyadi (a*), Getbogi Hikmawan (a), Freddy Permana Zen (b) a) Theoretical Physics Laboratory, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia *izrul314[at]gmail.com b) Indonesia Center of Theoretical and Mathematical Physics (ICTMP), Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia Abstract In this research, we study the inflation theories of Einstein-Gauss-Bonnet, minimal, non-minimal, and non-minimal derivative coupling with the constant-roll condition. Given the gravitational wave event, GW170817, which produces a gravitational wave speed was nearly equal to the speed of light, we constrain that speed of the tensor perturbation was nearly equal to unity, \(c_T^2\simeq1\). We involve a scalar field potential whose its function can be obtained from the equation of motion by designating the Gauss-Bonnet coupling function. We use the linear and quadratic coupling function, which are their simplest functions. The one result obtained are able to produce observed quantities such as the spectral index for scalar perturbation, \(n_s=0.9642\), the spectral index for tensor perturbation, \(n_T=-5.2471\times10^{-4}\), and tensor-scalar ratio, \(r=0.0041\), which is compatible with the latest Planck data using slow-roll parameters obtained analytically. Keywords: Gauss-Bonnet, constant-roll, inflation, GW170817, spectral index, tensor-scalar ratio. Share Link | Plain Format | Corresponding Author (Izrul Supriyadi)

176	Theoretical High Energy Physics	ABS-127
Expanding extra dimension on a conformally flat thick brane Muhammad Taufiqur Rohman, Triyanta, Agus Suroso, Jusak Sali Kosasih Theoretical High Energy Physics Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung Jalan Ganesha 10, Bandung 40132, Indonesia Abstract A conformal flat thick brane model with static and non-static warp factors is examined. The extra coordinate is assumed to expand according to \(b(t) = a(t)^\gamma\) where \(b(t)\) and \(a(t)\) are, respectively, the scale factors of the extra dimension and the brane, while \(\gamma\) can be a constant or a function of time. From the five-dimensional Einstein^s equation, the generalized Friedmann^s equation was obtained. In this research we consider two types of warp functions, the first is a function of the extra coordinate only, \(A(z)\), while the second is a function of the extra coordinate and the time, \(A(t, z)\). We obtained the scale factor solutions for both types of the warp functions for some cases. For the first type of warp function, we also identified that massless scalar field is localized on the thick brane. Considering a reverse process, warp factor solutions corresponding to the familiar forms of scale factor were obtained. Keywords: conformally flat brane, thick brane, brane cosmology Share Link | Plain Format | Corresponding Author (Muhammad Taufiqur Rohman)

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