Feedback Control Using Only Quantum Back-Action

Details Feedback Control Using Only Quantum Back-Action Feedback Control Using Only Quantum Back-Action

2009-04-24

arxiv.org/abs/0904.3745v1

New J. Phys. 12, 043005 (2010)

Physics

Quantum Physics

4 pages, revtex4, 3 eps figures

Scientific paper

The traditional approach to feedback control is to apply forces to a system by modifying the Hamiltonian. Here we show that quantum systems can be controlled without any Hamiltonian feedback, purely by exploiting the random quantum back-action of a continuous weak measurement. We demonstrate that, quite remarkably, the quantum back-action of such an adaptive measurement is just as effective at controlling quantum systems as traditional feedback.

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