Nonadiabatic Phase Transition with Broken Chiral Symmetry

Abstract

We explore nonadiabatic quantum phase transitions in an Ising spin chain with a linearly time-dependent transverse field and two different spins per unit cell. Such a spin system passes through critical points with gapless excitations, which support nonadiabatic transitions. Nevertheless, we find that the excitations on one of the chain sub-lattices are suppressed in the nearly-adiabatic regime exponentially. Thus, we reveal a coherent mechanism to induce exponentially large density separation for different quasiparticles.

v2: published version. 5+5 pages, 3+1 figures

References in corpus (4)

• Matter and Antimatter in the Universe
• Irruption of massive particle species during inflation
• Multistate Landau-Zener models with all levels crossing at one point
• Loss of adiabaticity with increasing tunneling gap in non-integrable multistate Landau-Zener models

Cited by in corpus (2)

• Kibble-Zurek scaling in the quantum Ising chain with a time-periodic perturbation
• Quantum cluster kink and ring frustration