Droplet-superfluid compounds in binary bosonic mixtures

• URL: http://arxiv.org/abs/2110.15675v1
• Date: Fri, 29 Oct 2021 10:45:54 GMT
• Title: Droplet-superfluid compounds in binary bosonic mixtures
• Authors: M. Nilsson Tengstrand and S.M. Reimann
• Abstract summary: We study the rotational properties of a superfluid system in a one-dimensional setting. We find that the residual condensate can carry angular momentum even in the absence of vorticity. Our findings are corroborated by an analysis of the elementary excitations in the system, and shed new light on the coexistence of localization and superfluidity.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: While quantum fluctuations in binary mixtures of bosonic atoms with short-range interactions can lead to the formation of a self-bound droplet, for equal intra-component interactions but an unequal number of atoms in the two components, there is an excess part that cannot bind to the droplet. Imposing confinement, as here through periodic boundary conditions in a one-dimensional setting, the droplet becomes amalgamated with a residual condensate. The rotational properties of this compound system reveal simultaneous rigid-body and superfluid behavior in the ground state and uncover that the residual condensate can carry angular momentum even in the absence of vorticity. In contradiction to the intuitive idea that the superfluid fraction of the system would be entirely made up of the excess atoms not bound by the droplet, we find evidence that this fraction is higher than what one would expect in such a picture. Our findings are corroborated by an analysis of the elementary excitations in the system, and shed new light on the coexistence of localization and superfluidity.

Related papers

• Production and stabilization of a spin mixture of ultracold dipolar Bose gases [39.58317527488534]
  We present experimental results for a mixture composed of the two lowest Zeeman states of $162$Dy atoms. Due to an interference phenomenon, the rate for such inelastic processes is dramatically reduced with respect to the Wigner threshold law.
  arXiv  Detail & Related papers  (2024-07-11T17:37:01Z)
• 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)
• 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)
• Fermionization of a Few-Body Bose System Immersed into a Bose-Einstein Condensate [0.0]
  We study the recently introduced self-pinning transition [Phys. Rev. Lett. 128, 053401 (2022) in a quasi-one-dimensional two-component quantum gas. As a result of the matter-wave backaction, the fermionization in the limit of infinite intraspecies repulsion occurs via a first-order phase transition to the self-pinned state. The system also exhibits an additional super state for the immersed component if the interspecies interaction is able to overcome the intraspecies repulsion.
  arXiv  Detail & Related papers  (2023-02-02T08:07:35Z)
• On the characterisation of fragmented Bose-Einstein condensation and its emergent effective evolution [77.34726150561087]
  Fragmented Bose-Einstein condensates are large systems of identical bosons displaying macroscopic occupations of one-body states. Characterising fragmentation solely in terms of reduced density matrices is unsatisfactory and ambiguous. We provide a quantitative rate of convergence to the leading effective dynamics in the double limit of infinitely many particles and infinite energy gap.
  arXiv  Detail & Related papers  (2022-11-14T06:25:19Z)
• Dynamical formation of two-fold fragmented many-body state induced by an impurity in a double-well [4.2575268077562685]
  We unravel the correlated quantum quench dynamics of a single impurity immersed in a bosonic environment. For a non-interacting bosonic bath and weak postquench impurity-bath interactions, we observe the formation of a two-fold fragmented many-body state.
  arXiv  Detail & Related papers  (2022-11-10T20:02:54Z)
• Mechanism for particle fractionalization and universal edge physics in quantum Hall fluids [58.720142291102135]
  We advance a second-quantization framework that helps reveal an exact fusion mechanism for particle fractionalization in FQH fluids. We also uncover the fundamental structure behind the condensation of non-local operators characterizing topological order in the lowest-Landau-level (LLL)
  arXiv  Detail & Related papers  (2021-10-12T18:00:00Z)
• Formation and quench of homonuclear and heteronuclear quantum droplets in one dimension [0.0]
  We exemplify the impact of beyond Lee-Huang-Yang (LHY) physics, especially due to intercomponent correlations, in the ground state and the quench dynamics of quantum droplets. Our findings pave the way for probing correlation-induced phenomena of droplet dynamics in current ultracold atom experiments.
  arXiv  Detail & Related papers  (2021-08-02T08:53:38Z)
• Observation-dependent suppression and enhancement of two-photon coincidences by tailored losses [68.8204255655161]
  Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter. In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement. Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
  arXiv  Detail & Related papers  (2021-05-12T06:47:35Z)
• Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(II) [52.259804540075514]
  We report the existence of a sizeable quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes. The level anti-crossing, or magnetic clock transition, associated with this gap has been directly monitored by heat capacity experiments. The comparison of these results with those obtained for a Co derivative, for which tunnelling is forbidden by symmetry, shows that the clock transition leads to an effective suppression of intermolecular spin-spin interactions.
  arXiv  Detail & Related papers  (2021-03-04T13:31:40Z)
• Rotational properties of superfluid Fermi-Bose mixtures in a tight toroidal trap [0.0]
  We consider a mixture of a Bose-Einstein condensate, with a paired Fermi superfluid, confined in a ring potential. We start with the ground state of the two clouds, identifying the boundary between the regimes of their phase separation and phase coexistence. When the two species coexist, the spectrum has a rich structure, consisting of continuous and discontinuous phase transitions.
  arXiv  Detail & Related papers  (2020-04-17T09:40:25Z)

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.