Current browse context:
quant-ph
Change to browse by:
References & Citations
Quantum Physics
Title: Long-range multipartite entanglement near measurement-induced transitions
(Submitted on 24 Apr 2024)
Abstract: Measurements profoundly impact quantum systems, and can be used to create new states of matter out of equilibrium. Here, we investigate the multipartite entanglement structure that emerges in quantum circuits involving unitaries and measurements. We describe how a balance between measurements and unitary evolution can lead to multipartite entanglement spreading to distances far greater than what is found in non-monitored systems, thus evading the usual fate of entanglement. We introduce a graphical representation based on spanning graphs that allows to infer the evolution of genuine multipartite entanglement for general subregions. We exemplify our findings on circuits that realize a 1d measurement-induced dynamical phase transition, where we find genuine 3-party entanglement at all separations. The 2- and 4-party cases are also covered with examples. Finally, we discuss how our approach can provide fundamental insights regarding entanglement dynamics for a wide class of quantum circuits and architectures.
Submission history
From: William Witczak-Krempa [view email][v1] Wed, 24 Apr 2024 18:00:01 GMT (575kb,D)
Link back to: arXiv, form interface, contact.