Cat states in a driven superfluid: role of signal shape and switching protocol



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Mateos Maroto, Jesús and Pieplow, Gregor and Creffield, Charles E. and Sols Lucía, Fernando (2021) Cat states in a driven superfluid: role of signal shape and switching protocol. European physical journal-special topics, 11 (1). ISSN 1951-6355

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We investigate the behavior of a one-dimensional Bose-Hubbard model whose kinetic energy is made to oscillate with zero time-average. The effective dynamics is governed by an atypical many-body Hamiltonian where only even-order hopping processes are allowed. At a critical value of the driving, the system passes from a Mott insulator to a superfluid formed by a cat-like superposition of two quasi-condensates with opposite non-zero momenta. We analyze the robustness of this unconventional ground state against variations of a number of system parameters. In particular we study the effect of the waveform and the switching protocol of the driving signal. Knowledge of the sensitivity of the system to these parameter variations allows us to gauge the robustness of the exotic physical behavior.

Item Type:Article
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©2021 Springer Heilderberg
This work was supported by Spain's MINECO through Grant FIS2017-84368-P, and by the UCM through Grant FEI-EU-19-12.

Uncontrolled Keywords:Physics; Multidisciplinary
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:65368
Deposited On:10 May 2021 17:32
Last Modified:11 May 2021 12:37

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