Article
Physics, Particles & Fields
Borna Salehian, Hong-Yi Zhang, Mustafa A. Amin, David Kaiser, Mohammad Hossein Namjoo
Summary: This paper systematically derives the SP equations and relativistic corrections from the nonlinear and fully relativistic KGE equations in an expanding universe, providing insights into deviations and applicability beyond the SP system. The method presented simplifies the analysis of scalar dark matter dynamics and accurately captures deviations from the SP system towards the full KGE case, particularly in calculating the mass-radius relationship of solitons.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Fabiola Fortuna, Pablo Roig, Jose Wudka
Summary: In this study, interactions between dark matter and standard model particles with spin one mediators are analyzed within an effective field theory framework. Solutions corresponding to operators with antisymmetric tensor mediators that meet various experimental constraints are obtained.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Upalaparna Banerjee, Joydeep Chakrabortty, Suraj Prakash, Shakeel Ur Rahaman, Michael Spannowsky
Summary: The BSMEFT is a theoretical framework constructed when the physics spectrum beyond the SM is non-degenerate, including additional IR degrees of freedom. Constructing a BSMEFT is usually the first step after experimental evidence for a new particle is established. This paper provides BSMEFT models and their EFT Lagrangian for three different scenarios.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Sukanta Panda, Abbas Altafhussain Tinwala, Archit Vidyarthi
Summary: We investigate the quantum stability of generalised Proca theories in curved spacetime treating gravity as a dynamical field. By evaluating the divergent part of the effective action at one-loop level using Vilkovisky-DeWitt formalism, we find that quantum corrections are suppressed by a UV cutoff parametrically higher than the Proca mass when the coupling constants are restricted to a certain range. Furthermore, we show that quantum corrections remain suppressed even at scales where classical non-linearities dominate over kinetic terms, allowing the Vainshtein mechanism to work effectively.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Chanyong Park
Summary: We investigate the time evolution of entanglement entropy in expanding universes with different matters. Using a braneworld model in an asymptotic AdS space with a uniform p-brane gas, we describe expanding universes holographically. The entanglement entropy of expanding universes increases according to the volume law in the early time and the area law in the late time. We also study the time-dependent quantum entanglement across the cosmological horizon.
Article
Astronomy & Astrophysics
Tsung-Han Yeh, Jessie Shelton, Keith A. Olivet, Brian D. Fieldsa
Summary: This study presents new limits on the cosmic expansion rate and relativistic energy density using the latest observations from Big Bang Nucleosynthesis (BBN) and the cosmic microwave background (CMB). The findings provide important constraints on early dark energy models and reveal the potential for exploring changes in neutrino species and the baryon-to-photon ratio across different cosmic epochs.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Particles & Fields
L. Allwicher, D. A. Faroughy, F. Jaffredo, O. Sumensari, F. Wilsch
Summary: We investigate the high-pT tails of the pp -> lv and pp -> ll Drell-Yan processes as probes of New Physics in semileptonic interactions. We provide a general decomposition of the 2 -> 2 scattering amplitudes and derive constraints on Wilson coefficients for semileptonic four-fermion and dipole operators as well as leptoquark models using the latest LHC run-II data. Our results highlight the complementarity between high-pT processes, electroweak pole measurements, and low-energy flavor data.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Multidisciplinary Sciences
Sayantan Choudhury
Summary: In this paper, a computational method is demonstrated to quantify two different types of cosmological auto-correlated OTO functions during the dominative phase of non-equilibrium features in primordial cosmology. It is found that there are significantly distinguishable non-chaotic, but random, behaviors in the OTO auto-correlations, which were not previously identified in this type of study. Additionally, the classical limiting behavior of these auto-correlated OTOC functions matches the large-time limiting behavior of the auto-correlations in the super-horizon regime of cosmological scalar mode fluctuation.
Article
Physics, Multidisciplinary
Huriye Gursel, Mert Mangut, Izzet Sakalli
Summary: In this study, a class of hyperscaling violating Lifshitz-like black branes with specific metric scaling components were analyzed, revealing behaviors of transport coefficients. The analytical results are expected to contribute to a better understanding of strongly coupled phenomena in systems such as high temperature superconductors, hypothetical magnetic monopoles, and liquid crystals.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Particles & Fields
Michael J. Baker, Andrea Thamm
Summary: Observing an evaporating black hole could provide conclusive information about elementary particles in nature, potentially discovering or excluding particles beyond the standard model of particle physics. Various scenarios beyond the standard model are considered, and the best ways to investigate them in the event of an observation are identified. Representative benchmark parameters are defined, and the photon spectra are analyzed over time. The impact of these models on future experimental analysis strategies is also discussed.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Ki-Seok Kim
Summary: This study investigates disordered strongly coupled conformal field theories in the large central-charge limit. By considering a quenched average for metric fluctuations and the renormalization group flow of the metric-tensor distribution function, it is revealed that the renormalized distribution function universally shows a power-law behavior, interpreted as an infinite randomness fixed point.
Article
Astronomy & Astrophysics
Mohammed Khalil, Raissa F. P. Mendes, Nestor Ortiz, Jan Steinhoff
Summary: In certain scalar-field extensions to general relativity, the effect of dynamical scalarization, where scalar charges develop on compact objects in an inspiraling binary, can be modeled using effective-field-theory methods applied to the binary within the post-Newtonian approximation. Previous studies focused on the adiabatic case for quasicircular orbits. This work explores the full dynamical evolution around the phase transition to the scalarized regime, considering generic orbits and quantifying nonadiabatic behavior. The results indicate that the full dynamics must be taken into account to reliably predict the onset of scalarization.
Article
Physics, Particles & Fields
Hajime Otsuka, Yutaka Sakamura
Summary: This study investigates the time evolution of the background spacetime during the moduli stabilization process in the radiation dominated era. The findings suggest that when the mass scale of stabilization is larger than the compactification scale, the contribution of radiation to the total energy density remains significant for a longer time, resulting in slower expansion of the non-compact 3D space and continued perception of extra dimensions by radiation.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Yi-Lin Li, Xi-Jing Wang, Guoyang Fu, Jian-Pin Wu
Summary: In this paper, a 3-dimensional holographic effective theory with gauge-axion coupling is implemented and an analytical black hole solution is obtained. The Direct current (DC) thermoelectric conductivities are investigated, and it is found that the DC electric conductivity is temperature dependent when the gauge-axion coupling vanishes, unlike the 4-dimensional axion model. Moreover, the gauge-axion coupling induces a metal insulator transition (MIT) at zero temperature. The properties of other DC thermoelectric conductivities are also discussed, and the violation of the Wiedemann-Franz law in this model is discovered.
Article
Physics, Particles & Fields
Andreas Helset, Elizabeth E. Jenkins, Aneesh V. Manohar
Summary: S-matrix elements are unaffected by field redefinitions and are determined by geometric quantities such as the curvature of the field-space manifold. A formalism is presented where both scalar and gauge fields are considered together, using a metric on the combined space. Scalar and gauge scattering amplitudes are given by the Riemann curvature of this combined space, and one-loop divergences can be computed using geometric invariants. The formalism is applied to compute renormalization group equations for even-parity bosonic operators in the Standard Model Effective Field Theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Multidisciplinary Sciences
Kaushik Y. Bhagat, Baibhab Bose, Sayantan Choudhury, Satyaki Chowdhury, Rathindra N. Das, Saptarshhi G. Dastider, Nitin Gupta, Archana Maji, Gabriel D. Pasquino, Swaraj Paul
Summary: The concept of the out-of-time-ordered correlation (OTOC) function is introduced as a strong theoretical probe of quantum randomness, with a general class defined to capture quantum randomness phenomena better. An equivalent formalism of computation using a general time-independent Hamiltonian for integrable Supersymmetric quantum systems is demonstrated, requiring consideration of two new correlators. By analyzing the Harmonic Oscillator and one-dimensional potential well models within the framework of Supersymmetry, distinct parameter dependences and time scales compared to non-Supersymmetric quantum mechanics are found. The consistency of the prescribed formalism in the classical limit is established through phase space averaged versions of OTOCs.
Article
Physics, Particles & Fields
Hardik Bohra, Sayantan Choudhury, Prashali Chauhan, Purnima Narayan, Sudhakar Panda, Abinash Swain
Summary: This study investigates the connection between the curvature of background De Sitter space-time and the spectroscopic study of entanglement of two atoms, revealing the intricate interplay between them. It shows that the Resonant Casimir Polder Interaction (RCPI) in an Open Quantum System (OQS) depends on the de Sitter space-time curvature relevant to the temperature of the thermal bath, impacting the effective Hamiltonian of the system. The findings suggest a novel understanding of the Lamb shift behavior characterized by an inverse square power law and its relationship to the background geometry.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
Subhashish Banerjee, Sayantan Choudhury, Satyaki Chowdhury, Rathindra Nath Das, Nitin Gupta, Sudhakar Panda, Abinash Swain
Summary: The study focuses on the indirect detection of the Cosmological Constant using spectroscopic shifts in an open quantum system of weakly interacting spins in the de Sitter background. The results show that the spectroscopic shifts, caused by the Casimir Polder interaction, play a crucial role in predicting a very tiny value of the Cosmological Constant in the static patch of de Sitter space, consistent with the observed value from the Planck measurements of the cosmic microwave background (CMB) anisotropies.
Article
Multidisciplinary Sciences
Sayantan Choudhury, Sachin Panneer Selvam, K. Shirish
Summary: Computation of circuit complexity has recently gained attention in the physics community to understand chaotic features and random fluctuations in the quantum regime. This paper studies the relationship between circuit complexity and Morse theory in the framework of algebraic topology, focusing on supersymmetric quantum field theory and providing a technical proof of the universal connecting relation between quantum chaos and circuit complexity.
Article
Physics, Multidisciplinary
Kiran Adhikari, Sayantan Choudhury
Summary: In this paper, the Krylov complexity (K) of the de Sitter space is studied using the two mode squeezed state formalism in the presence of an effective sound speed. The explicit behavior of Krylov complexity (K) and Lancoz coefficients (bn) with respect to the conformal time scale and scale factor are obtained. The results suggest that the universe acts like a chaotic system during this period and that Krylov complexity (K) is related to the volume.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Sayantan Choudhury, Sudhakar Panda, Nilesh Pandey, Abhishek Roy
Summary: This paper investigates the application of four-mode squeezed states in the cosmological context, focusing on the weakly coupled two scalar field model in the planar patch of the de Sitter space. By constructing the formalism of four-mode squeezed states and obtaining the coupled differential equations for time evolution, interesting dynamics with physical implications are observed and explored.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Sayantan Choudhury
Summary: In this paper, we utilize the Lewis Riesenfeld invariant quantum operator method to find continuous eigenvalues of quantum mechanical wave functions. We derive analytical expressions for the cosmological geometric phase and compute it in different physical situations. The aim of this work is to investigate unknown quantum mechanical features of the primordial universe. The results are expressed in terms of cosmological observables, providing numerical constraints on the Pancharatnam Berry phase that are consistent with recent cosmological observations.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Sayantan Choudhury, Arghya Mukherjee, Nilesh Pandey, Abhishek Roy
Summary: In this article, the physical implications of the causality constraint on Quantum Circuit Complexity (QCC) in the framework of Cosmological Effective Field Theory (COSMOEFT) are investigated using the two-mode squeezed quantum states. The relevant measures of the circuit complexity and their cosmological evolution for different values of the effective speed of sound are computed using two different approaches. The underlying relationship between the entanglement entropy and the circuit complexity is also established.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2023)
Article
Multidisciplinary Sciences
Kiran Adhikari, Sayantan Choudhury, Sourabh Kumar, Saptarshi Mandal, Nilesh Pandey, Abhishek Roy, Soumya Sarkar, Partha Sarker, Saadat Salman Shariff
Summary: Motivated by recent studies, this research explores the computation of circuit complexity in Z2 Even Effective Field Theories (Z2 EEFTs) in the context of weakly interacting scalar field theory. The complexity of a massive free field theory with higher-order Wilsonian operators is calculated, considering both the simple case of two oscillators and the general case of N oscillators. Geometric approach and parameterization techniques are used to compute the complexity, taking into account the contribution of higher-order operators and the dependency on other parameters.
Article
Multidisciplinary Sciences
Sayantan Choudhury, Rakshit Mandish Gharat, Saptarshi Mandal, Nilesh Pandey
Summary: In this work, we investigate the impact of quantum quenching on the circuit complexity of quenched quantum field theory with weakly coupled quartic interactions. By using the invariant operator method under a perturbative framework, we compute the ground state of this system and provide analytical expressions for specific reference and target states. Additionally, we analytically compute the circuit complexity for the quenched and interacting field theory using a particular cost functional, and numerically estimate the circuit complexity with respect to the quench rate, dt, for two coupled oscillators. We also comment on the variation in circuit complexity for different coupling strengths, numbers of oscillators, and dimensions.
Article
Multidisciplinary Sciences
Kiran Adhikari, Sayantan Choudhury, Hardey N. Pandya, Rohan Srivastava
Summary: In this article, the physical implications of quantum circuit complexity are investigated using the squeezed state formalism of Primordial Gravitational Waves (PGW). Quantum information-theoretic concepts have played a crucial role in understanding quantum systems, even in fields such as high-energy physics and cosmology. The paper focuses on studying the quantum circuit complexity of PGW for various cosmological models and computes complexity measures using different methods. By comparing complexity and entanglement entropy, various features regarding the evolution dynamics of different cosmological models can be probed.
Article
Astronomy & Astrophysics
Sayantan Choudhury, Sudhakar Panda, M. Sami
Summary: In this study, we provide a detailed analysis of the formation of Primordial Black Holes (PBHs) during Slow Roll (SR) to Ultra Slow Roll (USR) sharp transitions in the framework of single-field inflation using an effective field theory (EFT) approach. Our results show that the prospects for PBH formation are severely limited in a single-field inflationary framework when renormalizing the power spectrum to one loop order in P(X, phi) theories. We also demonstrate that the addition of an SR regime after USR before the end of inflation does not significantly change our conclusions. Moreover, our findings strictly rule out the possibility of generating large masses of PBHs from all possible models of single field inflation (canonical and non-canonical).
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Multidisciplinary
Sayantan Choudhury
Summary: In this work, the signatures of quantum entanglement in 3 + 1 dimensional global de Sitter space are studied by computing the entanglement negativity between two causally unrelated regions. It is found that the quantitative quantum information theoretic measure for entanglement negativity is consistent with the results obtained for entanglement entropy. The study also reveals the influence of axionic decay constant and supersymmetry breaking scale on the entanglement state. In addition, the possibility of a mini version of the multiverse within the current theoretical setup is discussed.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2023)
Article
Astronomy & Astrophysics
Sayantan Choudhury, Rakshit Mandish Gharat, Saptarshi Mandal, Nilesh Pandey, Abhishek Roy, Partha Sarker
Summary: In this work, we investigate the effects of a quantum quench on the entanglement measures of a coupled oscillator system and provide analytical and numerical results. The study reveals that the entanglement measures exhibit different behaviors with respect to the coupling strength and time periods.
Article
Astronomy & Astrophysics
Sayantan Choudhury, K. Shirish
Summary: This paper examines the fate of wormholes in a model without quenched disorder and discusses their role in the factorization problem. It also explores the relationship between wormholes and topological defects, as well as the impact of wormholes on the spectral form factor.