Nonlocality vs. complementarity: a conservative approach to the information problem

Understand

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.