Single and entangled atomic systems in thermal bath and the
Fulling-Davies-Unruh effect
- URL: http://arxiv.org/abs/2402.03351v1
- Date: Thu, 25 Jan 2024 14:19:28 GMT
- Title: Single and entangled atomic systems in thermal bath and the
Fulling-Davies-Unruh effect
- Authors: Arnab Mukherjee, Sunandan Gangopadhyay, and Archan S. Majumdar
- Abstract summary: We revisit the Fulling-Davies-Unruh effect in the context of two-level single and entangled atomic systems.
We consider the interaction between the systems and a massless scalar field, covering the scenarios of free space as well as within a cavity.
- Score: 0.10713888959520207
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We revisit the Fulling-Davies-Unruh effect in the context of two-level single
and entangled atomic systems that are either uniformly accelerated or static in
a thermal bath. We consider the interaction between the systems and a massless
scalar field, covering the scenarios of free space as well as within a cavity.
Through the calculation of atomic transition rates, it is found that in free
space there is an equivalence between a uniformly accelerated atom with respect
to an observer with that of a single atom which is static with respect to the
observer and immersed in a thermal bath, as long as the temperature of the
thermal bath matches the Unruh temperature. This equivalence breaks down in the
presence of a cavity. For two-atom systems, we consider the initial state to be
in a general pure entangled form. We find that in this case, the equivalence
between the accelerated and static thermal bath scenarios holds only under
specific limiting conditions in free space but breaks down completely in a
cavity set-up.
Related papers
- Thermalization in Trapped Bosonic Systems With Disorder [3.1457219084519004]
We study experimentally accessible states in a system of bosonic atoms trapped in an open linear chain with disorder.
We find that, within certain tolerances, most states in the chaotic region thermalize.
However, states with low participation ratios in the energy eigenstate basis show greater deviations from thermal equilibrium values.
arXiv Detail & Related papers (2024-07-05T19:00:02Z) - Microscopic contributions to the entropy production at all times: From
nonequilibrium steady states to global thermalization [0.0]
We numerically study microscopic contributions to the entropy production for the single electron transistor.
We find that the entropy production is dominated for most times by microscopic deviations from thermality in the baths.
arXiv Detail & Related papers (2023-09-21T06:30:20Z) - Fulling-Davies-Unruh effect for accelerated two-level single and
entangled atomic systems [0.32771631221674324]
We investigate the transition rates of uniformly accelerated two-level single and entangled atomic systems in empty space and inside a cavity.
For the two-atom system, we consider that the system is initially prepared in a generic pure entangled state.
No transition occurs for a maximally entangled super-radiant initial state.
arXiv Detail & Related papers (2023-05-11T06:50:10Z) - Entangled states dynamics of moving two-level atoms in a thermal field bath [0.0]
We study the dynamics of entanglement between the moving atom and a qubit at rest and isolated from the thermal field.
We find that in the case of the standard Unruh-DeWitt coupling and for high temperatures of the environment the decay of entanglement is delayed due to the atom's motion.
arXiv Detail & Related papers (2023-03-19T10:08:07Z) - Floquet-heating-induced Bose condensation in a scar-like mode of an open
driven optical-lattice system [62.997667081978825]
We show that the interplay of bath-induced dissipation and controlled Floquet heating can give rise to non-equilibrium Bose condensation.
Our predictions are based on a microscopic model that is solved using kinetic equations of motion derived from Floquet-Born-Markov theory.
arXiv Detail & Related papers (2022-04-14T17:56:03Z) - Heat transport and cooling performance in a nanomechanical system with
local and non local interactions [68.8204255655161]
We study heat transport through a one dimensional time-dependent nanomechanical system.
The system presents different stationary transport regimes depending on the driving frequency, temperature gradients and the degree of locality of the interactions.
arXiv Detail & Related papers (2022-02-21T12:03:54Z) - Dissipative phase transition in a spatially-correlated bosonic bath [0.0]
We show that atoms in a spatially-correlated thermal bath can show both the behavior depending on the temperature.
In this condition, a set of weak symmetries exist, which prevent thermalization.
The system undergoes a symmetry-broken dissipative phase transition of the first order as the temperature rises above zero.
arXiv Detail & Related papers (2021-04-18T16:21:55Z) - Taking the temperature of a pure quantum state [55.41644538483948]
Temperature is a deceptively simple concept that still raises deep questions at the forefront of quantum physics research.
We propose a scheme to measure the temperature of such pure states through quantum interference.
arXiv Detail & Related papers (2021-03-30T18:18:37Z) - Collective spontaneous emission of two entangled atoms near an
oscillating mirror [50.591267188664666]
We consider the cooperative spontaneous emission of a system of two identical atoms, interacting with the electromagnetic field in the vacuum state.
Using time-dependent theory, we investigate the spectrum of the radiation emitted by the two-atom system.
We show that it is modulated in time, and that the presence of the oscillating mirror can enhance or inhibit the decay rate.
arXiv Detail & Related papers (2020-10-07T06:48:20Z) - Analog cosmological reheating in an ultracold Bose gas [58.720142291102135]
We quantum-simulate the reheating-like dynamics of a generic cosmological single-field model in an ultracold Bose gas.
Expanding spacetime as well as the background oscillating inflaton field are mimicked in the non-relativistic limit.
The proposed experiment has the potential of exploring the evolution up to late times even beyond the weak coupling regime.
arXiv Detail & Related papers (2020-08-05T18:00:26Z) - Out-of-equilibrium quantum thermodynamics in the Bloch sphere:
temperature and internal entropy production [68.8204255655161]
An explicit expression for the temperature of an open two-level quantum system is obtained.
This temperature coincides with the environment temperature if the system reaches thermal equilibrium with a heat reservoir.
We show that within this theoretical framework the total entropy production can be partitioned into two contributions.
arXiv Detail & Related papers (2020-04-09T23:06:43Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.