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quant-ph2019★ 19 cited
Microwave measurement beyond the quantum limit with a nonreciprocal amplifier
F. Lecocq, L. Ranzani, G. A. Peterson +6
The measurement of a quantum system is often performed by encoding its state in a single observable of a light field. The measurement efficiency of this observable can be reduced b…
quant-ph2019★ 68 cited
Ultrastrong parametric coupling between a superconducting cavity and a mechanical resonator
G. A. Peterson, S. Kotler, F. Lecocq +5
We present a new optomechanical device where the motion of a micromechanical membrane couples to a microwave resonance of a three-dimensional superconducting cavity. With this arch…