Optomechanical state preparation via strong measurement

Ulrich B. Hoff, Johann S. Kollath-Bönig, Jonas Schou Neergaard-Nielsen +1 more

A novel protocol for generating quantum superpositions of macroscopically distinct states of a bulk mechanical oscillator is proposed, compatible with existing optomechanical devices operating in the bad-cavity limit. By combining a pulsed optomechanical quantum nondemolition (QND) interaction with nonclassical optical resources and measurement-induced feedback, the need for strong single-photon coupling is avoided. We outline a three-pulse sequence of QND interactions encompassing squeezing-enhanced cooling by measurement, state preparation, and tomography.

Manoj Das

Carlos Navarrete–Benlloch, Mehdi Abdi, Peter Degenfeld-Schonburg +2 more

George A. Brawley, Michael Ross Vanner, Warwick P. Bowen +2 more

We experimentally demonstrate, for the first time, quadratic measurement of mechanical motion in an optomechanical system. We use this nonlinear measurement to conditionally prepare classical non-Gaussian states of motion of a micro-mechanical oscillator.

Shabir Barzanjeh, André Xuereb, Simon Gröblacher +3 more

Max Ludwig