Reshaped Three-Body Interactions and the Observation of an Efimov State in the Continuum

• URL: http://arxiv.org/abs/2308.06237v2
• Date: Sat, 9 Mar 2024 20:15:21 GMT
• Title: Reshaped Three-Body Interactions and the Observation of an Efimov State in the Continuum
• Authors: Yaakov Yudkin, Roy Elbaz, Jos\'e P. D'Incao, Paul S. Julienne, Lev Khaykovich
• Abstract summary: Efimov trimers are exotic three-body quantum states that emerge from the different types of three-body continua. We find that the $7$Li Efimov trimer does not immediately dissociate when passing the threshold. We identify this behavior with a universal phenomenon related to the emergence of a repulsive interaction in the atom-dimer channel.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Efimov trimers are exotic three-body quantum states that emerge from the different types of three-body continua in the vicinity of two-atom Feshbach resonances. In particular, as the strength of the interaction is decreased to a critical point, an Efimov state merges into the atom-dimer threshold and eventually dissociates into an unbound atom-dimer pair. Here we explore the Efimov state in the vicinity of this critical point using coherent few-body spectroscopy in $^7$Li atoms using a narrow two-body Feshbach resonance. Contrary to the expectation, we find that the $^7$Li Efimov trimer does not immediately dissociate when passing the threshold, and survives as a metastable state embedded in the atom-dimer continuum. We identify this behavior with a universal phenomenon related to the emergence of a repulsive interaction in the atom-dimer channel which reshapes the three-body interactions in any system characterized by a narrow Feshbach resonance. Specifically, our results shed light on the nature of $^7$Li Efimov states and provide a path to understand various puzzling phenomena associated with them.

Related papers

• Dynamics of the unitary Bose gas near a narrow Feshbach resonance: universal coherent atom-molecule oscillations [6.676897456266681]
  We study a very narrow Feshbach resonance of $133$Cs atoms having a width of 8.3 mG. A rapid quench of an atomic condensate to unit leads to coherent oscillations involving dynamically produced condensed and non-condensed molecules and atoms. The same characteristic frequency, determined by the Feshbach coupling, is observed in all types of particles.
  arXiv  Detail & Related papers  (2024-08-15T20:48:31Z)
• Coherent Control of Spontaneous Emission for a giant driven $Λ $-type three-level atom [1.9976998521795732]
  Quantum optics with giant atoms provides a new approach for implementing optical memory devices at the atomic scale. We study the relaxation dynamics of a single driven three-level atom interacting with a one-dimensional waveguide.
  arXiv  Detail & Related papers  (2024-05-30T11:03:08Z)
• Rydberg molecules bound by strong light fields [0.0]
  We show that Rydberg macrodimers, weakly bound pairs of Rydberg atoms, can form bound states with the continuum of free motional states. This is enabled by the unique combination of extraordinarily slow vibrational motion in the molecular state and the optical coupling to a non-interacting continuum. Our results present an intriguing mechanism to control decoherence and bind multiatomic molecules using strong light-matter interactions.
  arXiv  Detail & Related papers  (2024-01-10T12:51:51Z)
• Loosely Bound Few-Body States in a Spin-1 Gas with Near-Degenerate Continua [0.0]
  A distinguishing feature of ultracold collisions of bosonic lithium atoms is the presence of two near-degenerate two-body continua. The influence of such a near-degeneracy on the few-body physics is investigated within the framework of a minimal model.
  arXiv  Detail & Related papers  (2023-01-19T14:34:03Z)
• 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)
• Non-Gaussian superradiant transition via three-body ultrastrong coupling [62.997667081978825]
  We introduce a class of quantum optical Hamiltonian characterized by three-body couplings. We propose a circuit-QED scheme based on state-of-the-art technology that implements the considered model.
  arXiv  Detail & Related papers  (2022-04-07T15:39:21Z)
• Dimerization of many-body subradiant states in waveguide quantum electrodynamics [137.6408511310322]
  We study theoretically subradiant states in the array of atoms coupled to photons propagating in a one-dimensional waveguide. We introduce a generalized many-body entropy of entanglement based on exact numerical diagonalization. We reveal the breakdown of fermionized subradiant states with increase of $f$ with emergence of short-ranged dimerized antiferromagnetic correlations.
  arXiv  Detail & Related papers  (2021-06-17T12:17:04Z)
• Partitioning dysprosium's electronic spin to reveal entanglement in non-classical states [55.41644538483948]
  We report on an experimental study of entanglement in dysprosium's electronic spin. Our findings open up the possibility to engineer novel types of entangled atomic ensembles.
  arXiv  Detail & Related papers  (2021-04-29T15:02:22Z)
• 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)
• Efimov energy level rebounding off the atom-dimer continuum [0.0]
  We show that the trimer energy level rebounds from the atom-dimer continuum and becomes a deeper bound state again. This provides a new challenge and guide for few-body theories to incorporate realistic interatomic potentials.
  arXiv  Detail & Related papers  (2020-04-06T15:01:45Z)

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.