Slinky inflation

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Slinky inflation
Gabriela Barenboim University of Valencia and IFIC
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• The Lagrangian for a scalar field is given
  by
• L ½ ?mf ?mf V(f)
  
• using Noethers theorem
• rf ½ f2 V(f) pf ½ f2 -
  V(f)
• In general kinetic and potential energy evolve
  with time. However..
• for a free field V0
• negligible kinetic energy (slow roll case)
• coherent oscillations

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A new ( quite bizarre) equation of state
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A new ( quite bizarre) equation of state
w - Cos ( Log (1z) )
- Cos ( Log (a ))
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A new ( quite bizarre) equation of state
w - Cos ( b Log (1z) )
- Cos ( b Log (a ))
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The thermal history of the Universe
ri rR rDE
rM
Wi
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How to get this pattern ?
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courtesy of Chris Quigg
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How to get this pattern ?
plus a weak perturbative coupling to light
fermions (friction)
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Conclusions
Dark energy and inflation can be explained both
by the evolution of a single scalar field.
It needs only three parameters to agree with all
available data
The thermal history of the Universe is far from
being known