4 papers · 1 filter
Cheshire terms, Aharonov-Bohm effects, and axions
Shi Chen, Aleksey Cherman, Gongjun Choi +1
We discuss unusual terms that can appear in field theories that allow global vortices. These `Cheshire terms' induce Aharonov-Bohm effects for some particles that move arou…
The Role of the Curvaton Post-Planck
Gongjun Choi, Wenqi Ke, Keith A. Olive
The expected improvements in the precision of inflationary physics observables including the scalar spectral index and the tensor-to-scalar ratio will reveal more than…
Inflaton Production of Scalar Dark Matter through Fluctuations and Scattering
Gongjun Choi, Marcos A. G. Garcia, Wenqi Ke +3
We study the effects on particle production of a Planck-suppressed coupling between the inflaton and a scalar dark matter candidate, . In the absence of this coupling, the domin…
Minimal Production of Prompt Gravitational Waves during Reheating
Gongjun Choi, Wenqi Ke, Keith A. Olive
The inflationary reheating phase begins when accelerated expansion ends. As all Standard Model particles are coupled to gravity, gravitational interactions will lead to particle pr…