Work

Entanglement in a fermion chain under continuous monitoring

Year: 2019

Type: article

Abstract: We study the entanglement entropy of the quantum trajectories of a free fermion chain under continuous monitoring of local occupation numbers. We propose a simple theory for entanglement entropy evolution from disentangled and highly excited initial states. It is based on generalized hydrodynamics and the quasi-particle pair approach to entanglement in integrable systems. We test several quantitative predictions of the theory against extensive numerics and find good agreement. In particular, the volume law entanglement is destroyed by the presence of arbitrarily weak measurement.

Source: SciPost Physics

DOI: 10.21468/scipostphys.7.2.024

Authors: Xiangyu Cao, Antoine Tilloy, Andrea De Luca

Institutions: University of California, Berkeley, Max Planck Institute of Quantum Optics, University of Oxford

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond