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dc.contributor.authorCorichi, Alejandro-
dc.contributor.authorCortez, Jerónimo-
dc.contributor.authorMena Marugán, Guillermo A.-
dc.identifier.citationPhysical Review D, 73 ( 8), id. 084020 (2006)en_US
dc.description17 pags.en_US
dc.description.abstractThe quantization of the family of linearly polarized Gowdy T3 spacetimes is discussed in detail, starting with a canonical analysis in which the true degrees of freedom are described by a scalar field that satisfies a Klein-Gordon type equation in a fiducial time-dependent background. A time-dependent canonical transformation, which amounts to a change of the basic (scalar) field of the model, brings the system to a description in terms of a Klein-Gordon equation on a background that is now static, although subject to a time-dependent potential. The system is quantized by means of a natural choice of annihilation and creation operators. The quantum time evolution is considered and shown to be unitary, so that both the Schrödinger and Heisenberg pictures can be consistently constructed. This has to be contrasted with previous treatments for which time evolution failed to be implementable as a unitary transformation. Possible implications for both canonical quantum gravity and quantum field theory in curved spacetime are noted.en_US
dc.description.sponsorshipThis work was supported by the Spanish MEC Projects No. FIS2004-01912 and No. FIS2005-05736- C03-02 and by CONACyT (Me´xico) Grant No. U47857- F. J. Cortez was funded by the Spanish MEC, No./ Ref. SB2003-0168.en_US
dc.format.extent234464 bytes-
dc.publisherAmerican Physical Societyen_US
dc.subject[PACS] Canonical quantization (gravitation)en_US
dc.subject[PACS] Lower dimensional and minisuperspace models in quantum gravityen_US
dc.subject[PACS] Quantum field theory in curved spacetimeen_US
dc.subject[PACS] Quantum cosmologyen_US
dc.titleQuantum Gowdy T3 model: a unitary descriptionen_US
dc.description.peerreviewedPeer revieweden_US
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