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Q: Fachverband Quantenoptik und Photonik

Q 8: Micromechanic oscillators II

Q 8.6: Vortrag

Montag, 18. März 2013, 15:15–15:30, F 142

Continuous-time quantum state engineering in optomechanics — •Sebastian Hofer¹, Markus Aspelmeyer¹, and Klemens Hammerer² — ¹Vienna Center for Quantum Science and Technology, Faculty of Physics, University of Vienna, 1090 Vienna, Austria — ²Institute for Theoretical Physics, Institute for Gravitational Physics, Leibniz University Hannover, 30167 Hannover, Germany

Control and state preparation of mechanical oscillators on the quantum level is one of the main goals of quantum optomechanics and has seen plenty of theoretical and experimental interest lately. Preparing a mechanical system in the ground state by side-band cooling has already been achieved. Recently cooling of mechanical motion has as well been demonstrated in a pulsed scheme, which also has the potential to prepare a mechanical squeezed states.

Building on our previous work which discussed optomechanical teleportation in the pulsed regime we here explore continuous-time mechanical state engineering. More specifically, we analyze a continuous quantum teleportation protocol which allows for teleportation of squeezed light states onto a mechanical oscillator by applying stochastic-master-equation methods developed in the context of continuous measurement and quantum control and estimation theory. We also show that with a similar scheme it is possible to generate continuous entanglement swapping between two oscillators. Furthermore we consider optomechanical feedback cooling in different parameter regimes and discuss its limitations.