Pattern formation in one-dimensional polaron systems and temporal orthogonality catastrophe

• URL: http://arxiv.org/abs/2110.11165v1
• Date: Thu, 21 Oct 2021 14:20:12 GMT
• Title: Pattern formation in one-dimensional polaron systems and temporal orthogonality catastrophe
• Authors: G. M. Koutentakis, S. I. Mistakidis, P. Schmelcher
• Abstract summary: Recent studies have demonstrated that higher than two-body bath-impurity correlations are not important for quantitatively describing the ground state of the Bose polaron. We employ the so-called Gross Ansatz approach to unravel the stationary and dynamical properties of the homogeneous one-dimensional Bose-polaron.
• Score: 0.0
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: Recent studies have demonstrated that higher than two-body bath-impurity correlations are not important for quantitatively describing the ground state of the Bose polaron. Motivated by the above, we employ the so-called Gross Ansatz (GA) approach to unravel the stationary and dynamical properties of the homogeneous one-dimensional Bose-polaron for different impurity momenta and bath-impurity couplings. We explicate that the character of the equilibrium state crossovers from the quasi-particle Bose polaron regime to the collective-excitation stationary dark-bright soliton for varying impurity momentum and interactions. Following an interspecies interaction quench the temporal orthogonality catastrophe is identified, provided that bath-impurity interactions are sufficiently stronger than the intraspecies bath ones, thus generalizing the results of the confined case. This catastrophe originates from the formation of dispersive shock wave structures associated with the zero-range character of the bath-impurity potential. For initially moving impurities, a momentum transfer process from the impurity to the dispersive shock waves via the exerted drag force is demonstrated, resulting in a final polaronic state with reduced velocity. Our results clearly demonstrate the crucial role of non-linear excitations for determining the behavior of the one-dimensional Bose polaron.

Related papers

• Observation of Nonlinear Response and Onsager Regression in a Photon Bose-Einstein Condensate [34.82692226532414]
  The quantum regression theorem states that the correlations of a system at two different times are governed by the same equations of motion as the temporal response of the average values. Here we experimentally demonstrate that the two-time particle number correlations in a photon Bose-Einstein condensate inside a dye-filled microcavity exhibit the same dynamics as the response of the condensate to a sudden perturbation of the dye molecule bath. This confirms the regression theorem for a quantum gas and, moreover, establishes a test of this relation in an unconventional form where the perturbation acts on the bath and only the condensate response is monitored.
  arXiv  Detail & Related papers  (2024-03-07T17:59:58Z)
• Bound impurities in a one-dimensional Bose lattice gas: low-energy properties and quench-induced dynamics [0.0]
  We study two mobile bosonic impurities immersed in a one-dimensional optical lattice and interacting with a bosonic bath. We consider the branch of repulsive interactions that induce the formation of bound impurities, akin to the bipolaron problem.
  arXiv  Detail & Related papers  (2024-02-05T15:01:14Z)
• Dynamics of inhomogeneous spin ensembles with all-to-all interactions: breaking permutational invariance [49.1574468325115]
  We investigate the consequences of introducing non-uniform initial conditions in the dynamics of spin ensembles characterized by all-to-all interactions. We find that the dynamics of the spin ensemble now spans a more expansive effective Hilbert space.
  arXiv  Detail & Related papers  (2023-09-19T16:44:14Z)
• Dissipative preparation of a Floquet topological insulator in an optical lattice via bath engineering [44.99833362998488]
  Floquet engineering is an important tool for realizing charge-neutral atoms in optical lattices. We show that a driven-dissipative system approximates a topological insulator.
  arXiv  Detail & Related papers  (2023-07-07T17:47:50Z)
• Nonergodic dynamics for an impurity interacting with bosons in tilted lattice [0.0]
  The fate of the single particle immersed in and interacting with a bath of other particles localized in a tilted lattice is investigated. For tilt values comparable to the tunneling rate a slow-down of the dynamics is observed without, however, a clear localization of the impurity.
  arXiv  Detail & Related papers  (2023-06-11T15:35:47Z)
• Dynamics of polaron formation in 1D Bose gases in the strong-coupling regime [0.0]
  We discuss the dynamics of the formation of a Bose polaron when an impurity is injected into a weakly interacting Bose condensate. We use Truncated Wigner simulations to show under what conditions the influence of quantum fluctuations is small.
  arXiv  Detail & Related papers  (2023-04-27T19:55:18Z)
• Intra- and interband excitations induced residue decay of the Bose polaron in a one-dimensional double-well [4.2575268077562685]
  We investigate the polaronic properties of a single impurity immersed in a bosonic environment confined within a one-dimensional double-well potential. We find that an increase of the impurity-bath coupling results in a vanishing residue. These residue regimes are characterized by two critical values of the bosonic repulsion and originate from the interplay between the intra- and the interband excitations of the impurity.
  arXiv  Detail & Related papers  (2021-11-04T15:36:41Z)
• 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)
• Parallel dark soliton pair in a bistable 2D exciton-polariton superfluid [47.187609203210705]
  2D dark solitons are unstable and collapse into vortices due to snake instabilities. We demonstrate that a pair of dark solitons can be formed in the wake of an obstacle in a polariton flow resonantly supported by a homogeneous laser beam.
  arXiv  Detail & Related papers  (2020-03-25T13:52:22Z)
• Dynamical solitons and boson fractionalization in cold-atom topological insulators [110.83289076967895]
  We study the $mathbbZ$ Bose-Hubbard model at incommensurate densities. We show how defects in the $mathbbZ$ field can appear in the ground state, connecting different sectors. Using a pumping argument, we show that it survives also for finite interactions.
  arXiv  Detail & Related papers  (2020-03-24T17:31:34Z)
• Pump Probe Spectroscopy of Bose Polarons: Dynamical Formation and Coherence [0.0]
  We propose and investigate a pump-probe spectroscopy scheme to unveil the time-resolved dynamics of fermionic or bosonic impurities immersed in a harmonically trapped Bose-Einstein condensate. A pump pulse initially transfers the impurities from a noninteracting to a resonantly interacting spin-state and, after a finite time, the probe pulse reverses this transition. We show that for interspecies repulsions exceeding the intraspecies ones a temporality catastrophe occurs, followed by enhanced energy redistribution processes, independently of the impurity's flavor.
  arXiv  Detail & Related papers  (2020-01-01T18:18:48Z)

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.