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Condensed Matter > Quantum Gases
Title: Dissipative two-dimensional Raman lattice
(Submitted on 1 Nov 2022 (this version), latest version 18 Jan 2023 (v2))
Abstract: We show that a dissipative two-dimensional Raman lattice can be engineered in a two-component ultracold atomic gas, where the interplay of the two-dimensional spin-orbit coupling and lightinduced atom loss gives rise to a density flow diagonal to the underlying square lattice. The flow is driven by the non-Hermitian corner skin effect, under which eigenstates localize toward one corner of the system. We illustrate that the topological edge states of the system can only be accounted for by the non-Bloch band theory where the deformation of the bulk eigenstates are explicitly considered. The directional flow can be detected through the dynamic evolution of an initially localized condensate in the lattice, or by introducing an immobile impurity species that interact spin-selectively with a condensate in the ground state of the Raman lattice.
Submission history
From: Haowei Li [view email][v1] Tue, 1 Nov 2022 12:35:38 GMT (1773kb,D)
[v2] Wed, 18 Jan 2023 02:39:29 GMT (1775kb,D)
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