Near-field dynamical Casimir effect

• URL: http://arxiv.org/abs/2410.21420v1
• Date: Mon, 28 Oct 2024 18:14:10 GMT
• Title: Near-field dynamical Casimir effect
• Authors: Renwen Yu, Shanhui Fan,
• Abstract summary: We propose the dynamical Casimir effect in a time-modulated near-field system. We have identified flux contributions from both quantum and thermal fluctuations at finite temperatures. Our findings open an avenue for the exploration of dynamical Casimir effect beyond cryogenic temperatures.
• Score: 0.2302001830524133
• License:
• Abstract: We propose the dynamical Casimir effect in a time-modulated near-field system. The system consists of two bodies made of polaritonic materials, that are brought in close proximity to each other, and the modulation frequency is approximately twice the relevant resonance frequencies of the system. We develop a rigorous fluctuational electrodynamics formalism to explore the produced Casimir flux, associated with the degenerate as well as non-degenerate two-polariton emission processes. We have identified flux contributions from both quantum and thermal fluctuations at finite temperatures, with a dominant quantum contribution even at room temperature under the presence of a strong near-field effect. We have conducted a nonclassicality test for the total radiative flux at finite temperatures, and shown that nonclasscical states of emitted photons can be obtained for a high temperature up to $\sim 250\,$K. Our findings open an avenue for the exploration of dynamical Casimir effect beyond cryogenic temperatures, and may be useful for creating tunable nanoscale nonclassical light sources.

Related papers

• Visualizing Dynamics of Charges and Strings in (2+1)D Lattice Gauge Theories [103.95523007319937]
  We study the dynamics of local excitations in a lattice of superconducting qubits. For confined excitations, the magnetic field induces a tension in the string connecting them. Our method allows us to experimentally image string dynamics in a (2+1)D LGT.
  arXiv  Detail & Related papers  (2024-09-25T17:59:05Z)
• Limits for coherent optical control of quantum emitters in layered materials [49.596352607801784]
  coherent control of a two-level system is among the most essential challenges in modern quantum optics. We use a mechanically isolated quantum emitter in hexagonal boron nitride to explore the individual mechanisms which affect the coherence of an optical transition under resonant drive. New insights on the underlying physical decoherence mechanisms reveals a limit in temperature until which coherent driving of the system is possible.
  arXiv  Detail & Related papers  (2023-12-18T10:37:06Z)
• Quantum field heat engine powered by phonon-photon interactions [58.720142291102135]
  We present a quantum heat engine based on a cavity with two oscillating mirrors. The engine performs an Otto cycle during which the walls and a field mode interact via a nonlinear Hamiltonian.
  arXiv  Detail & Related papers  (2023-05-10T20:27:15Z)
• Exciton Dynamics and Time-Resolved Fluorescence in Nanocavity-Integrated Monolayers of Transition-Metal Dichalcogenides [9.960057330841405]
  We have developed an ab-initio-based numerically-accurate methodology for the simulation of the exciton dynamics and time- and frequency-resolved fluorescence spectra of the cavity-controlled materials at finite temperature. This allowed us to establish dynamical and spectroscopic signatures of the polaronic and polaritonic effects as well as uncover their characteristic timescales in the relevant range of temperatures.
  arXiv  Detail & Related papers  (2023-03-25T10:13:43Z)
• Local Fluctuations in Cavity Control of Ferroelectricity [0.0]
  We study a quantum paraelectric sandwiched between two high-quality metal mirrors. We find that once a continuum of transverse modes are included the cavity ends up suppressing ferroelectric correlations. Our results are based on a general formalism and are expected to be widely applicable.
  arXiv  Detail & Related papers  (2023-01-05T02:55:52Z)
• Incandescent temporal metamaterials [0.0]
  Time-varying media can be seized to control and manipulate wave phenomena. Time-modulation releases strong field fluctuations confined within epsilon-near-zero bodies. It enables a narrowband (partially coherent) emission spanning the whole range of wavevectors.
  arXiv  Detail & Related papers  (2022-10-11T16:00:00Z)
• Photoinduced prethermal order parameter dynamics in the two-dimensional large-$N$ Hubbard-Heisenberg model [77.34726150561087]
  We study the microscopic dynamics of competing ordered phases in a two-dimensional correlated electron model. We simulate the light-induced transition between two competing phases.
  arXiv  Detail & Related papers  (2022-05-13T13:13:31Z)
• Non-equilibrium quantum thermodynamics of a particle trapped in a controllable time-varying potential [0.0]
  We study the dynamics of a levitated nanoparticles undergoing the transition from an harmonic potential to a double-well. We investigate the dynamics with the Wehrl entropy production and its rates. The effects and the competitions of the unitary and the dissipative parts onto the system are demonstrated.
  arXiv  Detail & Related papers  (2021-10-29T16:25:25Z)
• Evolution of a Non-Hermitian Quantum Single-Molecule Junction at Constant Temperature [62.997667081978825]
  We present a theory for describing non-Hermitian quantum systems embedded in constant-temperature environments. We find that the combined action of probability losses and thermal fluctuations assists quantum transport through the molecular junction.
  arXiv  Detail & Related papers  (2021-01-21T14:33:34Z)
• Quantum versus Classical Regime in Circuit Quantum Acoustodynamics [8.00487309438664]
  We experimentally study a circuit quantum acoustodynamics system, which consists of a superconducting artificial atom. We show that the propagation of microwave photons in the microwave transmission line can be controlled by a few phonons in the acoustic wave resonator.
  arXiv  Detail & Related papers  (2020-11-10T12:49:35Z)
• 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)

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.