Dynamical quantum phase transition with divergent multipartite entanglement

• URL: http://arxiv.org/abs/2506.13898v1
• Date: Mon, 16 Jun 2025 18:19:20 GMT
• Title: Dynamical quantum phase transition with divergent multipartite entanglement
• Authors: Jie Chen, Ricardo Costa de Almeida, Hendrik Weimer,
• Abstract summary: We investigate the nonequilibrium quench dynamics of the one-dimensional transverse-field Ising model in both integrable and nonintegrable regimes.<n>We report on a novel type of dynamical quantum phase transition (DQPT) that is characterized by a divergent multipartite entanglement at critical times in the post-quench dynamics.
• Score: 3.8286668229859098
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: We investigate the nonequilibrium quench dynamics of the one-dimensional transverse-field Ising model in both integrable and nonintegrable regimes. In particular, we report on a novel type of dynamical quantum phase transition (DQPT) that is characterized by a divergent multipartite entanglement at critical times in the post-quench dynamics. We quantify the multipartite entanglement of the state by the quantum Fisher information and demonstrate that the DQPT belongs to a different universality class than the ground-state phase transition. Furthermore, we perform a spectral analysis of the DQPT and demonstrate that it is a genuine nonequilibrium transition arising from the constructive interference of excited states of the system during the many-body dynamics. Finally, we discuss potential experimental realizations in Rydberg platforms as well as applications in the context of quantum metrology.

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