Quantum back reaction in integrable cosmology

M. Hotta, Y. Suzuki, Y. Tamiya, M. Yoshimura

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Two-dimensional dilaton gravity theories with a conserved current admit analytic integration of quantum back reaction in the semiclassical limit, yielding only a few classes of homogeneous cosmological solutions. One class of solutions describe a toy model of an inflationary universe which decays into a flat universe due to quantum back reaction, despite the apparent presence of a cosmological constant, thus providing a possible resolution of the cosmological constant problem. In another class of solutions the semiclassical approximation breaks down either initially or finally in the cosmological evolution.

Original languageEnglish
Pages (from-to)707-712
Number of pages6
JournalPhysical Review D
Issue number2
Publication statusPublished - 1993


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