Excited-state quantum phase transitions and Loschmidt-echo spectra in a spinor Bose-Einstein condensate
Excited-state quantum phase transitions and Loschmidt-echo spectra in a spinor Bose-Einstein condensate
Identifying dynamical signatures of excited-state quantum phase transitions (ESQPTs) in experimentally realizable quantum many-body systems is helpful for understanding the dynamical effects of ESQPTs. In such systems, the highly controllable spinor Bose-Einstein condensates (BECs) offer an exceptional platform to study ESQPTs. In this work, we investigate the dynamical characteristics of …