Nonadiabatic creation of macroscopic superpositions with strongly correlated 1D bosons on a ring trap

Abstract

We consider a strongly interacting quasi-one dimensional Bose gas on a tight ring trap subjected to a localized barrier potential. We explore the possibility to form a macroscopic superposition of a rotating and a nonrotating state under nonequilibrium conditions, achieved by a sudden quench of the barrier velocity. Using an exact solution for the dynamical evolution in the impenetrable-boson (Tonks-Girardeau) limit, we find an expression for the many-body wavefunction corresponding to a superposition state. The superposition is formed when the barrier velocity is tuned close to multiples of integer or half-integer number of Coriolis flux quanta. As a consequence of the strong interactions, we find that (i) the state of the system can be mapped onto a macroscopic superposition of two Fermi spheres, rather than two macroscopically occupied single-particle states as in a weakly interacting gas, and (ii) the barrier velocity should be larger than the sound velocity to better discriminate the two components of the superposition.

5 pages, 3 figures, revised introduction and new Fig3, final version to appear in PRA

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Cited by in corpus (20)

• Experimental realization of Josephson junctions for an Atom SQUID
• Atomtronic circuits: from many-body physics to quantum technologies
• Optimal Persistent Currents for Interacting Bosons on a Ring with a Gauge Field
• Few-body Bose gases in low dimensions -- a laboratory for quantum dynamics
• Coherent superposition of current flows in an Atomtronic Quantum Interference Device
• Critical Rotation of an Annular Superfluid Bose Gas
• Separation of Timescales in a Quantum Newton's Cradle
• Damping of Josephson oscillations in strongly correlated one-dimensional atomic gases
• Superfluid currents in half-moon polariton condensates
• Coherent Quantum Phase Slip in two-component bosonic Atomtronic Circuits
• Perspective on new implementations of atomtronic circuits
• Persistent currents in ultracold gases
• Tunneling vortex dynamics in linearly coupled Bose-Hubbard rings
• Static and dynamic phases of a Tonks-Girardeau gas in an optical lattice
• Bose-Einstein condensate confined in a 1D ring stirred with a rotating delta link
• Persistent currents in Bose-Bose mixtures after an interspecies interaction quench
• Nonclassical states in strongly correlated bosonic ring ladders
• Current production in ring condensates with a weak link
• Berry phase for a Bose gas on a one-dimensional ring
• Mesoscopic electron transport and atomic gases, a review of Frank W. J. Hekking's scientific work