Entanglement Spectrum and Entanglement Thermodynamics of Quantum Hall Bilayers at nu=1

Abstract

We study the entanglement spectra of bilayer quantum Hall systems at total filling factor nu=1. In the interlayer-coherent phase at layer separations smaller than a critical value, the entanglement spectra show a striking similarity to the energy spectra of the corresponding monolayer systems around half filling. The transition to the incoherent phase can be followed in terms of low-lying entanglement levels. Finally, we describe the connection between those two types of spectra in terms of an effective temperature leading to relations for the entanglement entropy which are in full analogy to canonical thermodynamics.

arXiv commentNew findings in Eqs.(5)-(8) and pertaining discussion, and addendum to the title, version as published

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