Phenomenology of a Rydberg impurity in an ideal Bose Einstein condensate

• URL: http://arxiv.org/abs/2404.03980v1
• Date: Fri, 5 Apr 2024 09:22:17 GMT
• Title: Phenomenology of a Rydberg impurity in an ideal Bose Einstein condensate
• Authors: Aileen A. T. Durst, Matthew T. Eiles,
• Abstract summary: impurity-bath interaction can greatly exceed the mean interparticle distance. Our analysis finds three distinct parameter regimes, each characterized by a unique spectral response. Our exploration offers insights into the interplay between interaction range, density, and many-body behavior in impurity systems.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate the absorption spectrum of a Rydberg impurity immersed in and interacting with an ideal Bose-Einstein condensate. Here, the impurity-bath interaction can greatly exceed the mean interparticle distance; this discrepancy in length scales challenges the assumptions underlying the universal aspects of impurity atoms in dilute bosonic environments. Our analysis finds three distinct parameter regimes, each characterized by a unique spectral response. In the low-density regime, we find that the Rydberg impurity is dressed by the surrounding bath similarly to the known Bose polaron. Transitioning to intermediate densities, the impurity response, given by sharp quasiparticle peaks, fragments into an intricate pattern bearing the hallmarks of a diverse molecular structure. Finally, at high density, a universal Gaussian response emerges as the statistical nature of the bath dominates its quantum dynamics. We complement this analysis with a study of an ionic impurity, which behaves equivalently. Our exploration offers insights into the interplay between interaction range, density, and many-body behavior in impurity systems.

Related papers

• Engineering impurity Bell states through coupling with a quantum bath [0.0]
  We consider two distinguishable impurities immersed in an atomic background cloud of bosons, with the entire system being confined in a harmonic trap. We show that the two impurities can form spatially entangled bipolaron states due to mediated interactions from the bosonic bath.
  arXiv  Detail & Related papers  (2024-06-11T05:50:16Z)
• Universal quantum dynamics of Bose polarons [0.0]
  We measure the spectral properties and real-time dynamics of mobile impurities injected into a homogeneous Bose--Einstein condensate. We map out both attractive and repulsive branches of polaron quasiparticles. For near-resonant interactions the polarons are no longer well defined, but the universality still holds.
  arXiv  Detail & Related papers  (2024-02-22T18:59:55Z)
• 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)
• The strongly driven Fermi polaron [49.81410781350196]
  Quasiparticles are emergent excitations of matter that underlie much of our understanding of quantum many-body systems. We take advantage of the clean setting of homogeneous quantum gases and fast radio-frequency control to manipulate Fermi polarons. We measure the decay rate and the quasiparticle residue of the driven polaron from the Rabi oscillations between the two internal states.
  arXiv  Detail & Related papers  (2023-08-10T17:59:51Z)
• Fragmented superconductivity in the Hubbard model as solitons in Ginzburg-Landau theory [58.720142291102135]
  Superconductivity and charge density waves are observed in close vicinity in strongly correlated materials. We investigate the nature of such an intertwined state of matter stabilized in the phase diagram of the elementary $t$-$tprime$-$U$ Hubbard model. We provide conclusive evidence that the macroscopic wave functions of the superconducting fragments are well-described by soliton solutions of a Ginzburg-Landau equation.
  arXiv  Detail & Related papers  (2023-07-21T18:00:07Z)
• 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)
• Stability and breakdown of Fermi polarons in a strongly interacting Fermi-Bose mixture [1.038987460834095]
  We investigate an imbalanced mixture of bosonic $41$K impurities immersed in a Fermi sea of ultracold $6$Li atoms. We find that the energy of the Fermi polarons formed in the thermal fraction of the impurity cloud remains rather insensitive to the impurity concentration. A closer investigation of the behavior of the condensate by means of Rabi oscillation measurements support this observation.
  arXiv  Detail & Related papers  (2021-03-05T12:08:42Z)
• Long-distance entanglement of purification and reflected entropy in conformal field theory [58.84597116744021]
  We study entanglement properties of mixed states in quantum field theory via entanglement of purification and reflected entropy. We find an elementary proof that the decay of both, the entanglement of purification and reflected entropy, is enhanced with respect to the mutual information behaviour.
  arXiv  Detail & Related papers  (2021-01-29T19:00:03Z)
• 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 and Complexity of Purification in (1+1)-dimensional free Conformal Field Theories [55.53519491066413]
  We find pure states in an enlarged Hilbert space that encode the mixed state of a quantum field theory as a partial trace. We analyze these quantities for two intervals in the vacuum of free bosonic and Ising conformal field theories.
  arXiv  Detail & Related papers  (2020-09-24T18:00:13Z)
• 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)

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.