Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series APC-TH
Subjects hep-th
Date Tuesday 17 October 2017
Time 14:00
Institute APC
Seminar Room 483 A - Malevitch
Speaker's Last Name Babichev
Speaker's First Name Eugeny
Speaker's Email Address
Speaker's Institution LTP Orsay
Title Caustic free completion of k-essence
Abstract Both k-essence and the pressureless perfect fluid develop caustic singularities at finite time. We explore the connection between the two and show that they belong to the same class of models, which admits the caustic free completion by means of the canonical complex scalar field. Specifically, the free massive/self- interacting complex scalar reproduces dynamics of pressureless perfect fluid/shift-symmetric k-essence under certain initial conditions in the limit of large mass/sharp self-interacting potential. We elucidate a mechanism of resolving caustic singularities in the complete picture.
arXiv Preprint Number

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