Seminars
Towards EPR Entanglement in a Hybrid Spin-Optomechanical system
May 30th, 2019 CHRISTOFFER BO MOLLER
Copenhagen University

The trade-off between imprecision noise and induced quantum back-action on a system under investigation sets the limit of measurement sensitivity. Even so, this talk will describe how a measurement of motion, with precision beyond the vacuum state uncertainty in both position and momentum, is possible simultaneously if carried out in an appropriate quantum reference frame.

In practice the center of mass motion of a membrane is optomechanically measured with a sensitivity limited by the quantum back-action. This talk will demonstrate how the quantum back-action is significantly evaded when measured in the quantum reference frame of a polarized cesium spin ensemble. Furthermore, our current efforts towards improving this evasion to the point of projecting the hybrid spin-optomechanical system into an EPR entangled state will be discussed.


Seminar, May 30, 2019, 10:00. Red Nest Meeting Room

Hosted by Prof. Adrian Bachtold

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