Can string theory overcome deep problems in quantum gravity?

Details Can string theory overcome deep problems in quantum gravity? Can string theory overcome deep problems in quantum gravity?

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phlb..272..239s&link_type=abstract

Physics Letters B, Volume 272, Issue 3-4, p. 239-244.

Physics

10

Scientific paper

Studies of the consequences of requiring a reconciliation of quantum mechanics and general relativity have led to a number of distasteful allegations. These include claims that pure quantum states evolve into mixed states and that wormhole contributions to the euclidean path integral render the parameters of particle physics stochastic. My point of view is that a sensible reconciliation requires replacing general relativity by string theory, and it should provide more satisfying answers to these problems. One possibility is that it provides many different types of ``quantum hair'', perhaps enough to account for all the entropy associated with black holes. Some possible sources of quantum hair in string theory are considered.

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