Towards mechanical entanglement in nano-electromechanical devices

Details Towards mechanical entanglement in nano-electromechanical devices Towards mechanical entanglement in nano-electromechanical devices

2003-11-18

arxiv.org/abs/quant-ph/0311113v3

Phys. Rev. Lett. 93, 190402 (2004)

Physics

Quantum Physics

4 pages, 3 figures, new material added

Scientific paper

10.1103/PhysRevLett.93.190402

We study arrays of mechanical oscillators in the quantum domain and demonstrate how the motions of distant oscillators can be entangled without the need for control of individual oscillators and without a direct interaction between them. These oscillators are thought of as being members of an array of nano-electromechanical resonators with a voltage being applicable between neighboring resonators. Sudden non-adiabatic switching of the interaction results in a squeezing of the states of the mechanical oscillators, leading to an entanglement transport in chains of mechanical oscillators. We discuss spatial dimensions, Q-factors, temperatures and decoherence sources in some detail, and find a distinct robustness of the entanglement in the canonical coordinates in such a scheme. We also briefly discuss the challenging aspect of detection of the generated entanglement.

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