Universal entanglement entropy in the ground state of biased bipartite systems

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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 behavior 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 inference of the bipartite entanglement entropy. All the above results are generalized for the Rényi entropy.

Original languageEnglish
Article numberL030401
JournalPhysical Review A
Issue number3
StatePublished - Sep 2022

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© 2022 American Physical Society.

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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