Quench-Probe Setup as Analyzer of Fractionalized Entanglement Spreading
| Autor: | Bauer, Nicolas P., Budich, Jan Carl, Trauzettel, Björn, Calzona, Alessio |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 130, 190401 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.130.190401 |
| Popis: | We propose a novel spatially inhomogeneous setup for revealing quench-induced fractionalized excitations in entanglement dynamics. In this quench-probe setting, the region undergoing a quantum quench is tunnel-coupled to a static region, the probe.Subsequently, the time-dependent entanglement signatures of a tunable subset of excitations propagating to the probe are monitored by energy selectivity. We exemplify the power of this generic approach by identifying a unique dynamical signature associated with the presence of an isolated Majorana zero mode in the post-quench Hamiltonian. In this case excitations emitted from the topological part of the system give rise to a fractionalized jump of $\log(2)/2$ in the entanglement entropy of the probe. This dynamical effect is highly sensitive to the localized nature of the Majorana zero mode, but does not require the preparation of a topological initial state. Comment: Accepted version |
| Databáze: | arXiv |
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