Seminar by Lucas Fabian
Talk time and date:
March 21th at 11:00 AM in Nicholson 241
Title: Review / progress report on entanglement of squeezed vacua
Abstract: There is a lot of ongoing work using complex structures to study power spectrum and entanglement entropy of scalar perturbations in cosmology. I will review our general methods and explain the machinery connecting entanglement entropy, correlation function and complex structure for Gaussian states. There are some subtleties when going from finitely many degrees of freedom to infinitely many, due to unitarily inequivalent representations. A recent progress provided an elegant method of finding adiabatic vacua using an ε expansion of the complex structure, rather than going through the standard WKB approximation. This aspect is still incomplete, but I will explain the general approach.
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