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Quantum measurement backaction and upconverting microwave signals with mechanical resonators

Event Details

Event Dates: 

Wednesday, April 5, 2017 - 10:00am

Seminar Location: 

  • JILA X317

Speaker Name(s): 

Bob Peterson

Speaker Affiliation(s): 

JILA, Regal group
Seminar Type/Subject

Scientific Seminar Type: 

  • JILA Thesis Defense

Event Details & 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 defense 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.