Aperiodic dynamical quantum phase transition in multi-band Bloch Hamiltonian and its origin
Kaiyuan Cao,
Hao Guo,
Guangwen Yang
Abstract:We investigate the dynamical quantum phase transition (DQPT) in the multi-band Bloch Hamiltonian of the one-dimensional periodic Kitaev model, focusing on quenches from a Bloch band. By analyzing the dynamical free energy and Pancharatnam geometric phase, we show that the critical times of DQPTs deviate from periodic spacing due to the multi-band effect, contrasting with results from two-band models. We propose a geometric interpretation to explain this non-uniform spacing. Additionally, we clarify the conditi… Show more
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