Tunable chiral spiral phases in a non-Hermitian Ising-Gamma spin chain

Abstract

We study the influence of dissipation on the Ising-Gamma model. Through observables such as ground-state energy, order parameters, entanglement entropy, etc., we identify each phase region and provide the global phase diagram of the system. The results show that the region of the spiral phase will continuously expand with the increase of dissipation, gradually squeezing the original paramagnetic and antiferromagnetic phase regions. Remarkably, unlike the conservative system, the introduction of dissipation will cause two spiral phases with opposite chiralities to emerge simultaneously in the system, which provides a possibility for the manipulation of spiral chirality in cold atomic experiments. Moreover, we reveal the mechanism of the dependence of the transformation between these two spiral phases with distinct chirality on the strength of the relative coefficient of off-diagonal Gamma interactions in the Ising-Gamma model. Since both the relevant order parameters and dissipation can be well controlled within a detectable range, these phenomena can be observed in ultracold atomic experiments.

References in corpus (16)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Spontaneous Skyrmion Ground States in Magnetic Metals
• Quantum trajectories and open many-body quantum systems
• Observation of parity-time symmetry breaking in a single spin system
• Subwavelength vacuum lattices and atom-atom interactions in photonic crystals
• Twisted magnetic patterns: Exploring the Dzyaloshinskii--Moriya vector
• Phase Diagram and Entanglement of Ising Model With Dzyaloshinskii-Moriya Interaction
• Ground-state phase diagram of a spin-1/2 frustrated ferromagnetic XXZ chain: Haldane dimer phase and gapped/gapless chiral phases
• Dynamical Control of Quantum Heat Engines Using Exceptional Points
• Impact of off-diagonal exchange interactions on the Kitaev spin liquid state of $\alpha$-RuCl${}_3$
• Emergent phase transition in Cluster Ising model with dissipation
• Lifshitz phase transitions in one-dimensional Gamma model
• Double exceptional links in a three-dimensional dissipative cold atomic gas
• Information propagation in one-dimensional XY-$\Gamma$ chains
• Spin-1/2 XX chains with modulated Gamma interaction
• Exact mobility line and mobility ring in the complex energy plane of a flat band lattice with a non-Hermitian quasiperiodic potential