52 citations · 222 across the 19 of their papers we have counts for
19 papers
Optomechanical Backreaction of Quantum Field Processes in Dynamical Casimir Effect
Yu-Cun Xie, Salvatore Butera, Bei-Lok Hu
Dynamical Casimir effect (DCE) and cosmological particle creation (CPC) share the same underlying physical mechanism, that of parametric amplification of vacuum fluctuations in the…
Fluctuations-Induced Quantum Radiation and Reaction from an Atom in a Squeezed Quantum Field
Matthew Bravo, Jen-Tsung Hsiang, Bei-Lok Hu
In this third of a series on quantum radiation, we explore the feasibility of using the memories kept in a quantum field to decipher certain information about the early universe. A…
Towards a Field-Theory based Relativistic Quantum Information
Charis Anastopoulos, Bei-Lok Hu, Konstantina Savvidou
We present our program for the development of quantum informational concepts in relativistic systems in terms of the unequal-time correlation functions of quantum fields. We employ…
Hot entanglement? -- Parametrically coupled quantum oscillators in two heat baths: instability, squeezing and driving
Onat Arısoy, Jen-Tsung Hsiang, Bei-Lok Hu
Entanglement being a foundational cornerstone of quantum sciences and the primary resource in quantum information processing, understanding its dynamical evolution in realistic con…
Gravity, Quantum Fields and Quantum Information: Problems with classical channel and stochastic theories
Charis Anastopoulos, Bei-Lok Hu
In recent years an increasing number of papers attempt to mimic or supplant quantum field theory in discussions of issues related to gravity by the tools and through the perspectiv…
Weyl Curvature Hypothesis in light of Quantum Backreaction at Cosmological Singularities or Bounces
Bei-Lok Hu
Penrose's 1979 Weyl curvature hypothesis (WCH) \cite{WCH} assumes that the universe began at a very low gravitational entropy state, corresponding to zero Weyl curvature, namely, t…
Relativistic Particle Motion and Quantum Optics in a Weak Gravitational Field
Charis Anastopoulos, Bei-Lok Hu
The possibility of long-baseline quantum experiments in space makes it necessary to better understand the time evolution of relativistic quantum particles in a weakly varying gravi…
Zeroth Law in Quantum Thermodynamics at Strong Coupling: `in Equilibrium', not `Equal Temperature'
Jen-Tsung Hsiang, Bei-Lok Hu
The zeroth law of thermodynamics involves a transitivity relation (pairwise between three objects) expressed either in terms of `equal temperature' (ET), or `in equilibrium' (EQ) c…
Quantum teleportation and entanglement swapping with long baseline in outer space
Shih-Yuin Lin, B. L. Hu
Quantum information experiments applying quantum optics in outer space with a very long baseline may have advantages over the current earth-bound experiments or the earth-to-satell…
Nonequilibrium Quantum Free Energy and Effective Temperature, Generating Functional and Influence Action
Jen-Tsung Hsiang, B. L. Hu
A definition of nonequilibrium free energy $\mathcal{F}_{\textsc{s}}$ is proposed for dynamical Gaussian quantum open systems strongly coupled to a heat bath and a formal derivatio…
Quantum Hierarchical Systems: Fluctuation Force by Coarse-Graining, Decoherence by Correlation Noise
Bei-Lok Hu
While the issues of dissipation, fluctuations, noise and decoherence in open quantum systems (with autocratic divide) analyzed via Langevin dynamics are familiar subjects, the trea…
Fluctuation-Dissipation Relation for Open Quantum Systems in Nonequilibrium Steady State
Jen-Tsung Hsiang, Bei-Lok Hu
Continuing our work on the nature and existence of fluctuation-dissipation relations (FDR) in linear and nonlinear open quantum systems [1-3], here we consider such relations when…
Quantum Superposition of Two Gravitational Cat States
Charis Anastopoulos, Bei-Lok Hu
We extend our earlier work on probing a gravitational cat state (gravcat)---see, arXiv:1504.03103 ---to the quantum superposition of two gravcats in an exemplary model and in Bose-…
Fluctuation-Dissipation Relation from the Nonequilibrium Dynamics of a Nonlinear Open Quantum System
Jen-Tsung Hsiang, Bei-Lok Hu
Continuing our inquiry into the conditions when fluctuation-dissipation relations (FDR) may appear in the context of nonequilibrium dynamics of open quantum systems (over and beyon…
Nonequilibrium Nonlinear Open Quantum Systems I. Functional Perturbative Analysis of a Weakly Anharmonic Oscillator
Jen-Tsung Hsiang, B. L. Hu
We introduce a functional perturbative method for treating weakly nonlinear systems coupled with a quantum field bath. We demonstrate using this method to obtain the covariance mat…
Atom-Field Interaction: From Vacuum Fluctuations to Quantum Radiation and Quantum Dissipation / Radiation Reaction
Jen-Tsung Hsiang, B. L. Hu
In this paper we dwell on three issues: 1) revisit the relation between vacuum fluctuations and radiation reaction in atom-field interactions, which began in the 70s and settled in…
Ground State Excitation of an Atom Strongly Coupled to a Free Quantum Field
Jen-Tsung Hsiang, Bei-Lok Hu
This paper presents a nonperturbative treatment of strong-coupling induced effects in atom-field systems which cannot be seen in traditional perturbative treatments invoking compro…
Infrared Behavior of Quantum Fields in Inflationary Cosmology -- Issues and Approaches: an overview
Bei-Lok Hu
This is a pedagogical guide to works on this subject which began in the 80s but has seen vibrant activities in the last decade. It aims to help orient readers, especially students,…
Comment on "A Spin Entanglement Witness for Quantum Gravity" and on "Gravitationally Induced Entanglement between Two Massive Particles is Sufficient Evidence of Quantum Effects in Gravity"
C. Anastopoulos, Bei-Lok Hu
This is a comment on articles Phys. Rev. Lett. 119, 240401 (2017) [arXiv:1707.06050] and Phys. Rev. Lett. 119, 240402 (2017) [arXiv:1707.06036]. We argue that gravity-induced entan…