Activity-induced phase transition in a quantum many-body system

Abstract

A crowd of nonequilibrium entities can show phase transition behaviors that are prohibited in conventional equilibrium setups. An interesting question is whether similar activity-driven phase transitions also occur in pure quantum systems. Here we introduce a minimally simple quantum many-body model that undergoes quantum phase transitions induced by non-Hermiticity. The model is based on a classical anisotropic lattice gas model that undergoes motility-induced phase separation (MIPS), and the quantum phase diagram includes other active phases such as the flocking phase. The quantum phase transitions, which in principle can be tested in ultracold atom experiments, is also identified as the transitions of dynamical paths in the classical kinetics upon the application of biasing fields. This approach sheds light on the useful connection between classical nonequilibrium kinetics and non-Hermitian quantum physics.

21 pages, 24 figures

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Cited by in corpus (16)

• Designing open quantum systems with known steady states: Davies generators and beyond
• Universal properties of repulsive self-propelled particles and attractive driven particles
• Engineering active motion in quantum matter
• Proposal of a quantum version of active particles via a nonunitary quantum walk
• Propelling Ferrimagnetic Domain Walls by Dynamical Frustration
• Power-law correlation in the homogeneous disordered state of anisotropically self-propelled systems
• Measurement-Induced Phase Transitions in Informational Active Matter
• Singular density correlations in chiral active fluids in three dimensions
• Heat-to-motion conversion for quantum active matter
• Hermitian and non-Hermitian topology in active matter
• Motion from Measurement: The Role of Symmetry of Quantum Measurements
• Modeling dissipation in quantum active matter
• Bubble formation in active binary mixture model
• Symmetry breaking in time-dependent billiards
• Dissipative Generation of Currents by Nonreciprocal Local and Global Environments
• On Interactions for Large Scale Interacting Systems