期刊
CLASSICAL AND QUANTUM GRAVITY
卷 32, 期 24, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0264-9381/32/24/245003
关键词
gravitational observables; black hole chaos; microcausality
类别
资金
- National Science Foundation [PHY12-05500, PHY15-04541, PHY11-25915]
- University of California
Observables in gravitational systems must be non-local so as to be invariant under diffeomorphism gauge transformations. But at the classical level some such observables can nevertheless satisfy an exact form of microcausality. This property is conjectured to remain true at all orders in the semiclassical expansion, though with limitations at finite (h) over bar or l(Planck). We also discuss related issues concerning observables in black hole spacetimes and comment on the senses in which they do and do not experience the form of chaos identified by Shenker and Stanford. In particular, in contrast to the situation in a reflecting cavity, this chaos does not afflict observables naturally associated with Hawking radiation for evaporating black holes.
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