Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-11-18
Class.Quant.Grav.28:025002,2011
Physics
High Energy Physics
High Energy Physics - Theory
11 pages of text and figures, + references. v2 minor text. v3 small revisions to match final journal version
Scientific paper
10.1088/0264-9381/28/2/025002
A proposal for resolution of the information paradox is that "nice slice" states, which have been viewed as providing a sharp argument for information loss, do not in fact do so as they do not give a fully accurate description of the quantum state of a black hole. This however leaves an information *problem*, which is to provide a consistent description of how information escapes when a black hole evaporates. While a rather extreme form of nonlocality has been advocated in the form of complementarity, this paper argues that is not necessary, and more modest nonlocality could solve the information problem. One possible distinguishing characteristic of scenarios is the information retention time. The question of whether such nonlocality implies acausality, and particularly inconsistency, is briefly addressed. The need for such nonlocality, and its apparent tension with our empirical observations of local quantum field theory, may be a critical missing piece in understanding the principles of quantum gravity.
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