HQOC/ITAMP Joint Quantum Sciences Seminar
Wednesday, March 6, 2013, 4:00 PM, J250
Guest Presenter: Prof. Keith Schwab, Professor of Applied Physics,
California Institute of Technology
"Experiments with Mechanical Systems at Quantum Limits: Current Status, Limitations,
Ways Forward"
It is now possible to both cool micron-scale mechanical structures to thermal states with
occupancy near the ground state and to perform back-action evading measurements with
sensitivity near the zero-point level. However, we have found that glassy dielectrics and
resulting noise processes block further cooling to a high purity ground state and leads to
parametric instabilities. I will describe this work and our plans to avoid these noise
sources. I will also describe our experiments with a gram-scale oscillators formed by a
superfluid He-4 acoustic resonator coupled to very low dissipation microwave resonators,
and prospects to achieve extremely low-dissipation, measurements at the standard quantum
limit, and extremely sensitive detection of inertial forces.
Student Presentation by Philip Zupancic, Graduate Student, Greiner Lab
“Local Amplitude and Phase Control – Dynamic Beamshaping via MicromirrorDevices”
Student Presentation will begin at 4:00 PM
Guest Presentation will begin at 4:30 PM
Refreshments will be provided
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HQOC/ITAMP Joint Quantum Sciences Seminar
Wednesday, March 6, 2013, 4:00 PM, J250
Guest Presenter: Prof. Keith Schwab, Professor of Applied Physics,
California Institute of Technology
"Experiments with Mechanical Systems at Quantum Limits: Current Status, Limitations,
Ways Forward"
It is now possible to both cool micron-scale mechanical structures to thermal states with
occupancy near the ground state and to perform back-action evading measurements with
sensitivity near the zero-point level. However, we have found that glassy dielectrics and
resulting noise processes block further cooling to a high purity ground state and leads to
parametric instabilities. I will describe this work and our plans to avoid these noise
sources. I will also describe our experiments with a gram-scale oscillators formed by a
superfluid He-4 acoustic resonator coupled to very low dissipation microwave resonators,
and prospects to achieve extremely low-dissipation, measurements at the standard quantum
limit, and extremely sensitive detection of inertial forces.
Student Presentation by Philip Zupancic, Graduate Student, Greiner Lab
“Local Amplitude and Phase Control – Dynamic Beamshaping via Micromirror Devices”
Student Presentation will begin at 4:00 PM
Guest Presentation will begin at 4:30 PM
Refreshments will be provided