Hartle-Hawking state is a maximum of entanglement entropy

Details Hartle-Hawking state is a maximum of entanglement entropy Hartle-Hawking state is a maximum of entanglement entropy

1999-04-02

arxiv.org/abs/gr-qc/9904005v2

Phys.Rev. D61 (2000) 064015

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Latex, 4 pages, Some comments are added on the "small backreaction condition"

Scientific paper

10.1103/PhysRevD.61.064015

It is shown that the Hartle-Hawking state of a scalar field is a maximum of
entanglement entropy in the space of pure quantum states satisfying the
condition that backreaction is finite. In other words, the Hartle-Hawking state
is a curved-space analogue of the EPR state, which is also a maximum of
entanglement entropy.

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