How is the density of quasi-two-dimensional uniform dipolar quantum Bose gases affected by trap imperfections?

• URL: http://arxiv.org/abs/2403.04719v1
• Date: Thu, 7 Mar 2024 18:15:41 GMT
• Title: How is the density of quasi-two-dimensional uniform dipolar quantum Bose gases affected by trap imperfections?
• Authors: Thibault Bourgeois, Lauriane Chomaz
• Abstract summary: We theoretically investigate the impact of weak perturbations of a flat potential on the density of a quasi-two-dimensional dipolar Bose gas. We use a mean-field perturbative treatment of the potential defects and derive their effects at first order in the mean-field stable regime.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We theoretically investigate the impact of weak perturbations of a flat potential on the density of a quasi-two-dimensional dipolar Bose gas. We use a mean-field perturbative treatment of the potential defects and derive their effects at first order in the mean-field stable regime. We first focus on defects containing a single spatial frequency and study the wavevector dependence of the density perturbation. A qualitative modification of the wavenumber dependence with the interaction parameters and a sensitivity in the excitation direction reveal the long-range and anisotropic dipolar effects. These effects are found to be most important at intermediate wavenumbers and can give rise to a local maximum in the density perturbation reminiscent of the roton mode softening and local instabilities. The dependence on the gas and interaction parameters is studied. The case of a flat potential perturbed with white noise on a certain momentum range is then examined. Here it is found that the strength perturbation becomes independent of the mean density when sufficiently large. Our study touches upon experimentally relevant issues, giving hints on how flat a uniform potential should be to achieve uniform quasi-two-dimensional dipolar Bose gases.

Related papers

• Observation of many-body coherence in quasi-one-dimensional attractive Bose gases [2.023140069605251]
  Macroscopic coherence is an important feature of quantum many-body systems exhibiting collective behaviors.<n>Here, we experimentally study the first- and second-order coherence of degenerate quasi-one-dimensional (1D) Bose gases quenched from repulsive to modulationally unstable interaction regimes.<n>The resulting dynamics reveals phase-coherent density wave evolutions arising from the interplay between noise-amplified density modulations and dispersive shock waves of broad interest within nonlinear physics.
  arXiv  Detail & Related papers  (2025-06-16T15:23:20Z)
• Quantum optical scattering by macroscopic lossy objects: A general approach [55.2480439325792]
  We develop a general approach to describe the scattering of quantum light by a lossy macroscopic object placed in vacuum. We exploit the input-output relation to connect the output state of the field to the input one. We analyze the impact of the classical transmission and absorption dyadics on the transitions from ingoing to outgoing s-polariton.
  arXiv  Detail & Related papers  (2024-11-27T17:44:29Z)
• Dissipative stabilization of maximal entanglement between non-identical emitters via two-photon excitation [49.1574468325115]
  Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement. We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
  arXiv  Detail & Related papers  (2023-06-09T16:49:55Z)
• Fate of the "vacuum point'' and of grey solitons in dispersive quantum shock waves in a one-dimensional Bose gas [0.0]
  We study dispersive quantum shock waves in a one-dimensional Bose gas beyond the mean-field approximation. We show that both the vacuum point and grey solitons cease to manifest themselves beyond the mean-field approach.
  arXiv  Detail & Related papers  (2023-05-28T06:39:06Z)
• Dynamics of moire trion and its valley polarization in microfabricated WSe2/MoSe2 heterobilayer [0.36944296923226316]
  We propose a microfabrication technique based on focused Ga+ ion beams, which enables us to control the number of peaks originating from the moire potential. By taking advantage of this approach, we reveal emissions from a single moire exciton and charged moire exciton (trion) under electrostatic doping conditions.
  arXiv  Detail & Related papers  (2023-01-26T10:02:37Z)
• Quantum asymmetry and noisy multi-mode interferometry [55.41644538483948]
  Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator. We show that the asymmetry may emphincrease as a result of a emphdecrease of coherence inside a degenerate subspace.
  arXiv  Detail & Related papers  (2021-07-23T07:30:57Z)
• Multimode Trapped Interferometer with Ideal Bose-Einstein Condensates [2.0290671957380604]
  We experimentally demonstrate a multi-mode interferometer comprising a Bose-Einstein condensate of $39$K atoms trapped in a harmonic potential. We find that the relative amplitudes of the momentum components at the interferometer output are sensitive to external forces.
  arXiv  Detail & Related papers  (2021-06-14T06:33:17Z)
• Light-matter interactions near photonic Weyl points [68.8204255655161]
  Weyl photons appear when two three-dimensional photonic bands with linear dispersion are degenerated at a single momentum point, labeled as Weyl point. We analyze the dynamics of a single quantum emitter coupled to a Weyl photonic bath as a function of its detuning with respect to the Weyl point.
  arXiv  Detail & Related papers  (2020-12-23T18:51:13Z)
• Entanglement dynamics in dissipative photonic Mott insulators [62.997667081978825]
  In spite of particle losses the quantum entanglement propagation exhibits a ballistic character with propagation speeds related to the differerent quasiparticles that are involved in the dynamics. Our analysis reveals that photon dissipation has a strikingly asymmetric behavior in the two configurations with a much more dramatic role on the holon entanglement propagation than for the doublon case.
  arXiv  Detail & Related papers  (2020-04-27T15:48:24Z)
• Theory of waveguide-QED with moving emitters [68.8204255655161]
  We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace. We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
  arXiv  Detail & Related papers  (2020-03-20T12:14:10Z)
• Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
  We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit. We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront. The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
  arXiv  Detail & Related papers  (2020-03-09T21:27:02Z)

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.