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Detecting and coupling quantum objects with quantum light

Dan Stamper-Kurn, Berkeley
Monday, April 18, 2016 - 4:00pm to 5:00pm
PAA A-102
An assortment of quantum technologies are being developed, for purposes
such as precise sensing, quantum information processing, and quantum
simulation of complex systems, in which light is used to cause quantum
objects to interact and to allow their properties to be measured. By
combining techniques of ultracold atomic physics and quantum optics, we
have developed a system in which both mechanical oscillators and also
spin oscillators, both comprised of small batches of atoms trapped in
vacuum, interact with the electromagnetic modes of a high-finesse
optical cavity. This system has allows us to explore optomechanical and
magneto-optical interactions at distinctly quantum mechanical regimes.
I will highlight three major results from our work: the first
demonstration of a force sensor operating at the standard quantum limit,
the observation of coherent and incoherent backaction effects on spin
oscillators coupled to an optical cavity, and an exploration of
light-mediated interactions between two near-ground-state mechanical
oscillators.

​Watch a video​ of the colloquium

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