Multipartite Entanglement in the Measurement-Induced Phase Transition of
the Quantum Ising Chain
- URL: http://arxiv.org/abs/2302.06477v1
- Date: Mon, 13 Feb 2023 15:54:11 GMT
- Title: Multipartite Entanglement in the Measurement-Induced Phase Transition of
the Quantum Ising Chain
- Authors: Alessio Paviglianiti and Alessandro Silva
- Abstract summary: External monitoring of quantum many-body systems can give rise to a measurement-induced phase transition.
We show that this transition extends beyond bipartite correlations to multipartite entanglement.
- Score: 77.34726150561087
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: External monitoring of quantum many-body systems can give rise to a
measurement-induced phase transition characterized by a change in behavior of
the entanglement entropy from an area law to an unbounded growth. In this
Letter, we show that this transition extends beyond bipartite correlations to
multipartite entanglement. Using the quantum Fisher information, we investigate
the entanglement dynamics of a continuously monitored quantum Ising chain.
Multipartite entanglement exhibits the same phase boundaries observed for the
entropy in the post-selected no-click trajectory. Instead, quantum jumps give
rise to a more complex behavior that still features the transition, but adds
the possibility of having a third phase with logarithmic entropy but bounded
multipartiteness.
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