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Title: Nonclassical states in strongly correlated bosonic ring ladders
Authors: Victorin, Nicolas
Haug, Tobias
Kwek, Leong-Chuan
Amico, Luigi
Minguzzi, Anna
Keywords: Bose Gases
Bose-Einstein Condensates
Issue Date: 2019
Source: Victorin, N., Haug, T., Kwek, L.-C., Amico, L., & Minguzzi, A. (2019). Nonclassical states in strongly correlated bosonic ring ladders. Physical Review A, 99(3), 033616-. doi:10.1103/PhysRevA.99.033616
Series/Report no.: Physical Review A
Abstract: We study the ground state of a bosonic ring ladder under a gauge flux in the vortex phase, corresponding to the case where the single-particle dispersion relation has two degenerate minima. By combining exact diagonalization and an approximate fermionization approach we show that the ground state of the system evolves from a fragmented state of two single-particle states at weak interparticle interactions to a fragmented state of two Fermi seas at large interactions. Fragmentation is inferred from the study of the eigenvalues of the reduced single-particle density matrix as well as from the calculation of the fidelity of the states. We characterize these nonclassical states by the momentum distribution, the chiral currents, and the current-current correlations.
ISSN: 2469-9926
DOI: 10.1103/PhysRevA.99.033616
Rights: © 2019 American Physical Society. All rights reserved. This paper was published in Physical Review A and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:IAS Journal Articles

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