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Strings in singular time‐dependent backgrounds
Author(s) -
Giveon A.,
Rabinovici E.,
Sever A.
Publication year - 2003
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.200310102
Subject(s) - gravitational singularity , quotient , cosmology , abelian group , algebraic number , theoretical physics , gauge theory , physics , field (mathematics) , gauge (firearms) , space (punctuation) , mathematical physics , pure mathematics , mathematics , algebra over a field , mathematical analysis , quantum mechanics , computer science , geography , archaeology , operating system
We review the construction of time‐dependent backgrounds with space‐like singularities. We mainly consider exact CFT backgrounds. The algebraic and geometric aspects of these backgrounds are discussed. Physical issues, results and difficulties associated with such systems are reviewed. Finally, we present some new results: a two dimensional cosmology in the presence of an Abelian gauge field described within a family of ${{SL(2)\times U(1)} \over {U(1)\times Z}}$ quotient CFTs.