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SUMMARY:La Trobada: Theoretical bounds on the tensor-to-scalar ratio in th
 e cosmic microwave background
DTSTART;VALUE=DATE-TIME:20130508T093000Z
DTEND;VALUE=DATE-TIME:20130508T103000Z
DTSTAMP;VALUE=DATE-TIME:20260703T161619Z
UID:indico-event-1918@indico.ific.uv.es
DESCRIPTION:Tensor modes in the cosmic microwave background are one of the
  most robust signatures of inflation. We derive theoretical bounds on the 
 tensor fraction\, as a generalization of the well-known Lyth bound. Under 
 reasonable assumptions\, the new bounds are at least two orders of magnitu
 de stronger than the original one. We comment on a previously derived gene
 ralization\, the so-called Efstathiou-Mack relationship. We also derive a 
 new absolute upper bound on tensors using de Sitter entropy bounds.\n\nhtt
 ps://indico.ific.uv.es/event/1918/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1918/
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