Semiclassical gravity beyond coherent states

• URL: http://arxiv.org/abs/2310.16289v1
• Date: Wed, 25 Oct 2023 01:48:53 GMT
• Title: Semiclassical gravity beyond coherent states
• Authors: Shahnewaz Ahmed, Caroline Lima and Eduardo Mart\'in-Mart\'inez
• Abstract summary: We show that it is possible to still use semiclassical gravity together with quantum field theory. In particular, we identify families of cat states for which the gravitational backreaction can be modeled by semiclassical gravity.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We show that it is possible to still use semiclassical gravity together with quantum field theory beyond the regimes where the field state is coherent. In particular, we identify families of cat states (superposition of almost-distinguishable coherent states that have very non-classical features) for which the gravitational backreaction can be modeled by semiclassical gravity.

Related papers

• State Swapping via Semiclassical Gravity [0.0]
  We show that the Hamiltonian of semiclassical gravity results in an evolution of coherent states that is virtually indistinguishable from swapping them. Our results indicate that drawing a definitive conclusion about the nature of gravity based solely on its ability to swap a pair of coherent states would be premature.
  arXiv  Detail & Related papers  (2024-10-28T13:33:53Z)
• Testing the quantum nature of gravity without entanglement [5.461938536945723]
  Given a unitary evolution $U$, how well can $U$ be simulated by local operations and classical communication (LOCC) on that ensemble? We establish a general, efficiently computable upper bound on the maximal LOCC simulation fidelity. We then apply our findings to the fundamental setting where $U$ implements a quantum Newtonian Hamiltonian over a gravitationally interacting system.
  arXiv  Detail & Related papers  (2023-02-06T19:22:48Z)
• Quantum Instability [30.674987397533997]
  We show how a time-independent, finite-dimensional quantum system can give rise to a linear instability corresponding to that in the classical system. An unstable quantum system has a richer spectrum and a much longer recurrence time than a stable quantum system.
  arXiv  Detail & Related papers  (2022-08-05T19:53:46Z)
• Correspondence Between the Energy Equipartition Theorem in Classical Mechanics and its Phase-Space Formulation in Quantum Mechanics [62.997667081978825]
  In quantum mechanics, the energy per degree of freedom is not equally distributed. We show that in the high-temperature regime, the classical result is recovered.
  arXiv  Detail & Related papers  (2022-05-24T20:51:03Z)
• Quantum dynamics corresponding to chaotic BKL scenario [62.997667081978825]
  Quantization smears the gravitational singularity avoiding its localization in the configuration space. Results suggest that the generic singularity of general relativity can be avoided at quantum level.
  arXiv  Detail & Related papers  (2022-04-24T13:32:45Z)
• Three little paradoxes: making sense of semiclassical gravity [0.0]
  I show that an experiment by Page and Geilker does not exclude such a semiclassical theory. I present a classification of semiclassical models defined by the way in which the wave function collapse is introduced.
  arXiv  Detail & Related papers  (2022-01-25T16:54:49Z)
• Entanglement dynamics of spins using a few complex trajectories [77.34726150561087]
  We consider two spins initially prepared in a product of coherent states and study their entanglement dynamics. We adopt an approach that allowed the derivation of a semiclassical formula for the linear entropy of the reduced density operator.
  arXiv  Detail & Related papers  (2021-08-13T01:44:24Z)
• Non-equilibrium stationary states of quantum non-Hermitian lattice models [68.8204255655161]
  We show how generic non-Hermitian tight-binding lattice models can be realized in an unconditional, quantum-mechanically consistent manner. We focus on the quantum steady states of such models for both fermionic and bosonic systems.
  arXiv  Detail & Related papers  (2021-03-02T18:56:44Z)
• Squeezed coherent states for gravitational well in noncommutative space [0.0]
  We have studied the quantum gravitational well (GW) under the shed of noncommutative (NC) space. We have considered both position-position and momentum-momentum noncommutativity. We have shown that the solutions of the time-dependent Schr"odinger equation are squeezed-coherent states.
  arXiv  Detail & Related papers  (2020-06-20T23:02:23Z)
• Relating the Entanglement and Optical Nonclassicality of Multimode States of a Bosonic Quantum Field [0.0]
  We provide bounds relating entanglement measures with optical nonclassicality measures. We infer strong bounds on the entanglement that can be produced with an optically nonclassical state impinging on a beam splitter.
  arXiv  Detail & Related papers  (2020-04-24T14:44:02Z)
• From a quantum theory to a classical one [117.44028458220427]
  We present and discuss a formal approach for describing the quantum to classical crossover. The method was originally introduced by L. Yaffe in 1982 for tackling large-$N$ quantum field theories.
  arXiv  Detail & Related papers  (2020-04-01T09:16:38Z)

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.