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Experiment to detect dark energy forces using atom interferometry
Dylan Sabulsky, Indranil Dutta, E. A. Hinds +3
The accelerated expansion of the universe motivates a wide class of scalar field theories that modify gravity on large scales. In regions where the weak field limit of General Rela…
Inflation in Loop Quantum Cosmology
Anshuman Bhardwaj, Edmund J. Copeland, Jorma Louko
We develop a consistent analytic approach to determine the conditions under which slow roll inflation can arise when the inflaton is the same scalar field that is responsible for t…
Dark energy after GW170817, revisited
Edmund J. Copeland, Michael Kopp, Antonio Padilla +2
We revisit the status of scalar-tensor theories with applications to dark energy in the aftermath of the gravitational wave signal GW170817 and its optical counterpart GRB170817A.…
Symmetron Scalar Fields: Modified Gravity, Dark Matter or Both?
Clare Burrage, Edmund J. Copeland, Christian Käding +1
Scalar fields coupled to gravity through the Ricci scalar have been considered both as dark matter candidates and as a possible modified gravity explanation for galactic dynamics.…
Fifth forces, Higgs portals and broken scale invariance
Clare Burrage, Edmund J. Copeland, Peter Millington +1
We study the relationship between the strength of fifth forces and the origin of scale breaking in the Standard Model (SM) of particle physics. We start with a light scalar field t…
Gravitational waves from asymmetric oscillon dynamics?
Mustafa A. Amin, Jonathan Braden, Edmund J. Copeland +4
It has been recently suggested that oscillons produced in the early universe from certain asymmetric potentials continue to emit gravitational waves for a number of -folds of ex…