Universal entanglement entropy in the ground state of biased bipartite systems

• URL: http://arxiv.org/abs/2206.03073v2
• Date: Wed, 24 Aug 2022 08:43:11 GMT
• Title: Universal entanglement entropy in the ground state of biased bipartite systems
• Authors: Ohad Shpielberg
• Abstract summary: Ground state entanglement entropy is studied in a many-body bipartite quantum system. Single and multiple conserved quantities lead to different power-law exponents. occupancy measurements allow to infer the bipartite entanglement entropy.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The ground state entanglement entropy is studied in a many-body bipartite quantum system with either a single or multiple conserved quantities. It is shown that the entanglement entropy exhibits a universal power-law behaviour at large $R$ -- the occupancy ratio between the two subsystems. Single and multiple conserved quantities lead to different power-law exponents, suggesting the entanglement entropy can serve to detect hidden conserved quantities. Moreover, occupancy measurements allow to infer the bipartite entanglement entropy. All the above results are generalized for the R\'enyi entropy.

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