Engineering Superposition States and Tailored Probes for Nano-resonators Via Open-Loop Control

Details Engineering Superposition States and Tailored Probes for Nano-resonators Via Open-Loop Control Engineering Superposition States and Tailored Probes for Nano-resonators Via Open-Loop Control

2008-07-31

arxiv.org/abs/0807.5132v2

Phys. Rev. Lett. 102, 057208 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, Revtex 4

Scientific paper

10.1103/PhysRevLett.102.057208

We show that a nano-resonator can be prepared in mesoscopic-superposition states merely by monitoring a qubit coupled to the square of the resonators position. This works for thermal initial states, and does not require a third-order nonlinearity. The required coupling can be generated using a simple open-loop control protocol, obtained with optimal control theory. We simulate the complete preparation process, including environmental noise. Our results indicate the power of open-loop control for state-engineering and measurement in quantum nano-systems.

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