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Signatures of a hidden cosmic microwave background
Joerg Jaeckel, Javier Redondo, Andreas Ringwald
If there is a hidden photon -- i.e. a light abelian gauge boson in the hidden sector -- its kinetic mixing with the standard photon can produce a hidden cosmic microwave background…
Entropy Growth and the Dark Energy Equation of State
Wilfried Buchmuller, Joerg Jaeckel
We revisit the conjecture of a generalized second law of thermodynamics which states that the combined entropy of matter and horizons must grow. In an expanding universe a generali…
What measurable zero point fluctuations can(not) tell us about dark energy
Michael Doran, Joerg Jaeckel
We show that laboratory experiments cannot measure the absolute value of dark energy. All known experiments rely on electromagnetic interactions. They are thus insensitive to parti…
Testing Dark Energy and Light Particles via Black Hole Evaporation at Colliders
Michael Doran, Joerg Jaeckel
We show that collider experiments have the potential to exclude a light scalar field as well as generic models of modified gravity as dark energy candidates. Our mechanism uses the…
Loop Corrections to Scalar Quintessence Potentials
Michael Doran, Joerg Jaeckel
The stability of scalar quintessence potentials under quantum fluctuations is investigated both for uncoupled models and models with a coupling to fermions. We find that uncoupled…
Loop Corrections to Scalar Quintessence Potentials
M. Doran, J. Jaeckel
The stability of scalar quintessence potentials under quantum fluctuations is investigated for both uncoupled models and models with a coupling to fermions. We find that uncoupled…