Antichiral and trap-skin dynamics in a nonreciprocal bosonic two-leg ladder with artificial magnetic flux

Abstract

Non-Hermiticity and synthetic gauge fields play two fundamental roles in engineering exotic phases and dynamics in artificial quantum systems. Here we explore the mean-field dynamics of interacting bosons in a two-leg ladder with synthetic magnetic flux and nonreciprocal hopping under the open boundary condition. In the Hermitian limit, we showcase the breakdown of the flux-driven chiral dynamics due to the nonlinear self-trapping effect. We further find that the nonreciprocity can drive the transition between chiral dynamics and antichiral dynamics. The antichiral motion is manifested as the non-Hermitian skin dynamics along the same direction on two legs that are not suppressed by the magnetic flux, while the chiral-antichiral transition is flux-tunable. We also reveal the trap-skin dynamics with the coexistence of the self-tapping and skin dynamics in the ladder. Dynamical phase diagrams with respect to the chiral-antichiral dynamics, skin dynamics, self-trapping dynamics, and trap-skin dynamics are presented. Our results shed light on intriguing dynamical phenomena under the interplay among non-Hermiticity, nonlinearity, and artificial gauge fields.

9 pages, 6 figures

References in corpus (13)

• Topological Photonics
• Topological Quantum Matter with Ultracold Gases in Optical Lattices
• Nonlinear control of PT-symmetry and non-Hermitian topological states
• Mean-field dynamics of a non-Hermitian Bose-Hubbard dimer
• Tunable non-reciprocal quantum transport through a dissipative Aharonov-Bohm ring in ultracold atoms
• Vortex and Meissner phases of strongly-interacting bosons on a two-leg ladder
• Aharonov-Bohm Caging and Inverse Anderson transition in Ultracold Atoms
• Topological Anderson insulators in two-dimensional non-Hermitian disordered systems
• Anti-chiral edge states in an exciton polariton strip
• Dynamical nonlinear higher-order non-Hermitian skin effects and topological trap-skin phase
• Correlations at PT-symmetric quantum critical point
• Nonlinear Topological Edge States in a non-Hermitian Array of Optical Waveguides Embedded in an Atomic Gas
• Interplay of nonreciprocity and nonlinearity on mean-field energy and dynamics of a Bose-Einstein condensate in a double-well potential