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Quantum measurement backaction and upconverting microwave signals with mechanical resonators

TitleQuantum measurement backaction and upconverting microwave signals with mechanical resonators
Publication TypeThesis
Year of Publication2017
AuthorsPeterson, RW
Academic DepartmentPhysics
DegreePh.D.
Number of Pages135
Date Published2017-04
UniversityUniversity of Colorado
CityBoulder, CO
Abstract

The limits of optical measurement and control of mechanical motion are set by the quantum nature of light. The familiar shot noise limit can be avoided by increasing the optical power, but at high enough powers, the backaction of the randomly arriving photons' radiation pressure can grow to become the dominant force on the system. This thesis will describe an experiment showing how backaction limits the laser cooling of macroscopic drumhead membranes, as well as work on how these membranes can be used to upconvert microwave signals to optical frequencies, potentially preserving the fragile quantum state of the upconverted signal.