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

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

URL: http://arxiv.org/abs/2005.05181v1
Date: Mon, 11 May 2020 15:15:06 GMT
Title: Cat states in a driven superfluid: role of signal shape and switching protocol
Authors: Jes\'us Mateos, Gregor Pieplow, Charles Creffield, Fernando Sols
Abstract summary: We investigate the behavior of a one-dimensional Bose-Hubbard model whose kinetic energy is made to oscillate with zero time-average. We analyze the robustness of this unconventional ground state against variations of a number of system parameters.
Score: 62.997667081978825
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: 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.

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