Entanglement-enhanced time-continuous quantum control in optomechanics

Author(s): S. Hofer, K. Hammerer

Journal: Physical Review A

Volume: 91

Page(s): 033822

Year: 2015

DOI Number: 10.1103/PhysRevA.91.033822

Link: Link to publication


The cavity-optomechanical radiation pressure interaction provides the means to create entanglement between a mechanical oscillator and an electromagnetic field interacting with it. Here we show how we can utilize this entanglement within the framework of time-continuous quantum control, in order to engineer the quantum state of the mechanical system. Specifically, we analyze how to prepare a low-entropy mechanical state by (measurement-based) feedback cooling operated in the blue detuned regime, the creation of bipartite mechanical entanglement via time-continuous entanglement swapping, and preparation of a squeezed mechanical state by time-continuous teleportation. The protocols presented here are feasible in optomechanical systems exhibiting a cooperativity larger than 1.

Note: http://arxiv.org/abs/1411.1337

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