Quench dynamics of Rydberg-dressed bosons on two-dimensional square lattices

Zhou, Yijia; Li, Yongqiang; Nath, Rejish; Li, Weibin

Abstract

We study dynamics of bosonic atoms on a two dimensional square lattice, where atomic interactions are long ranged with either a box or soft-core shape. The latter can be realized through laser dressing ground state atoms to electronically excited Rydberg states. When the range of interactions is equal or larger than the lattice constant, the system is governed by an extended Bose-Hubbard model. We propose a quench process by varying the atomic hopping linearly across phase boundaries of the Mott insulator-supersolid and supersolid-superfluid phases. Starting from a Mott insulator state, dynamical evolution exhibits a universal behaviour at the early stage. We numerically find that the universality is largely independent of interactions during this stage. However, dynamical evolution could be significantly altered by long-range interactions at later times. We demonstrate that density wave excitations are important below a critical quench rate, where non-universal dynamics is found. We also show that the quench dynamics can be analysed through time-of-flight images, i.e. measuring the momentum distribution and noise correlations.

• Journal Article Type: Article
• Acceptance Date: Jan 3, 2020
• Online Publication Date: Jan 21, 2020
• Publication Date: Jan 21, 2020
• Deposit Date: Jan 15, 2020
• Publicly Available Date: Jan 21, 2020
• Journal: Physical Review A
• Print ISSN: 2469-9926
• Electronic ISSN: 2469-9934
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 101
• Issue: 1
• Article Number: 013427
• DOI: https://doi.org/10.1103/physreva.101.013427
• Public URL: https://nottingham-repository.worktribe.com/output/3732162