Area, Entanglement Entropy and Supertranslations at Null Infinity
Mar 24, 201610 pages
Published in:
- Class.Quant.Grav. 34 (2017) 16, 165007
- Published: Jul 26, 2017
e-Print:
- 1603.07706 [hep-th]
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Abstract: (IOP)
The area of a cross-sectional cut of future null infinity ( ) is infinite. We define a finite, renormalized area by subtracting the area of the same cut in any one of the infinite number of BMS-degenerate classical vacua. The renormalized area acquires an anomalous dependence on the choice of vacuum. We relate it to the modular energy, including a soft graviton contribution, of the region of to the future of . Under supertranslations, the renormalized area shifts by the supertranslation charge of . In quantum gravity, we conjecture a bound relating the renormalized area to the entanglement entropy across of the outgoing quantum state on .Note:
- 14 pages
- entropy: entanglement
- quantum gravity
- vacuum state
- gravitation
- graviton
- modular
References(48)
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