Universal quantum dynamics of Bose polarons

• URL: http://arxiv.org/abs/2402.14816v1
• Date: Thu, 22 Feb 2024 18:59:55 GMT
• Title: Universal quantum dynamics of Bose polarons
• Authors: Ji\v{r}\'i Etrych, Gevorg Martirosyan, Alec Cao, Christopher J. Ho, Zoran Hadzibabic, Christoph Eigen
• Abstract summary: 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Predicting the emergent properties of impurities immersed in a quantum bath is a fundamental challenge that can defy quasiparticle treatments. Here, we measure the spectral properties and real-time dynamics of mobile impurities injected into a homogeneous Bose--Einstein condensate, using two Feshbach resonances to tune both the impurity-bath and intrabath interactions. We map out both attractive and repulsive branches of polaron quasiparticles, resolving the repulsive polaron and the molecular state associated with the Feshbach resonance in the strongly interacting regime, and show that the latter also has a many-body character. Our measurements reveal remarkably universal behavior, controlled by the bath density and a single dimensionless interaction parameter; for near-resonant interactions the polarons are no longer well defined, but the universality still holds.

Related papers

• Long-range interactions in Weyl dense atomic arrays protected from dissipation and disorder [41.94295877935867]
  Long-range interactions are a key resource in many quantum phenomena and technologies. We show how to design the polaritonic bands of these atomic metamaterials to feature a pair of frequency-isolated Weyl points. These Weyl excitations can thus mediate interactions that are simultaneously long-range, due to their gapless nature; robust, due to the topological protection of Weyl points; and decoherence-free, due to their subradiant character.
  arXiv  Detail & Related papers  (2024-06-18T20:15:16Z)
• 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)
• Phenomenology of a Rydberg impurity in an ideal Bose Einstein condensate [0.0]
  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.
  arXiv  Detail & Related papers  (2024-04-05T09:22:17Z)
• 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)
• A unified theory of strong coupling Bose polarons: From repulsive polarons to non-Gaussian many-body bound states [0.0]
  We show that the interplay of impurity-induced instability and stabilization by repulsive boson-boson interactions results in a discrete set of metastable many-body bound states. This work provides a unified theory of attractive and repulsive Bose polarons on the repulsive side of the Feshbach resonance.
  arXiv  Detail & Related papers  (2023-05-01T14:05:11Z)
• Collective flow of fermionic impurities immersed in a Bose-Einstein Condensate [34.82692226532414]
  We study the collective oscillations of spin-polarized fermionic impurities immersed in a Bose-Einstein condensate. For strong interactions, the Fermi gas perfectly mimics the superfluid hydrodynamic modes of the condensate. With an increasing number of bosonic thermal excitations, the dynamics of the impurities cross over from the collisionless to the hydrodynamic regime.
  arXiv  Detail & Related papers  (2023-04-16T00:58:05Z)
• Mobile impurities interacting with a few one-dimensional lattice bosons [0.0]
  We report a comprehensive study of the ground-state properties of one and two bosonic impurities immersed in small one-dimensional optical lattices loaded with a few bosons. We report polaron and bipolaron energies across the superfluid to Mott-insulator transition and confirm the formation of bipolaron bound states induced by repulsive interactions.
  arXiv  Detail & Related papers  (2022-07-19T14:49:51Z)
• Formation of robust bound states of interacting microwave photons [148.37607455646454]
  One of the hallmarks of interacting systems is the formation of multi-particle bound states. We develop a high fidelity parameterizable fSim gate that implements the periodic quantum circuit of the spin-1/2 XXZ model. By placing microwave photons in adjacent qubit sites, we study the propagation of these excitations and observe their bound nature for up to 5 photons.
  arXiv  Detail & Related papers  (2022-06-10T17:52:29Z)
• Quantum chaos driven by long-range waveguide-mediated interactions [125.99533416395765]
  We study theoretically quantum states of a pair of photons interacting with a finite periodic array of two-level atoms in a waveguide. Our calculation reveals two-polariton eigenstates that have a highly irregular wave-function in real space.
  arXiv  Detail & Related papers  (2020-11-24T07:06:36Z)
• Collective spontaneous emission of two entangled atoms near an oscillating mirror [50.591267188664666]
  We consider the cooperative spontaneous emission of a system of two identical atoms, interacting with the electromagnetic field in the vacuum state. Using time-dependent theory, we investigate the spectrum of the radiation emitted by the two-atom system. We show that it is modulated in time, and that the presence of the oscillating mirror can enhance or inhibit the decay rate.
  arXiv  Detail & Related papers  (2020-10-07T06:48:20Z)

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.