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Is there an information-loss problem for black holes? | | Claus Kiefer
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29 Apr 2003 | | Subject: | gr-qc hep-th | | Abstract: | Black holes emit thermal radiation (Hawking effect). If after black-hole evaporation nothing else were left, an arbitrary initial state would evolve into a thermal state (`information-loss problem’). Here it is argued that the whole evolution is unitary and that the thermal nature of Hawking radiation emerges solely through decoherence -- the irreversible interaction with further degrees of freedom. For this purpose a detailed comparison with an analogous case in cosmology (entropy of primordial fluctuations) is presented. Some remarks on the possible origin of black-hole entropy due to interaction with other degrees of freedom are added. This might concern the interaction with quasi-normal modes or with background fields in string theory. | | Source: | arXiv, gr-qc/0304102 | | Services: | Forum | Review | PDF | Favorites | |
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