Quantum Feedback Control of Atomic Motion in an Optical Cavity

Details Quantum Feedback Control of Atomic Motion in an Optical Cavity Quantum Feedback Control of Atomic Motion in an Optical Cavity

2003-10-24

arxiv.org/abs/quant-ph/0310153v3

Phys. Rev. Lett. 92 (2004) 223004

Physics

Quantum Physics

5 pages, 4 figures; v2 includes minor corrections (no content change); v3 includes minor wording/figure changes to match publi

Scientific paper

10.1103/PhysRevLett.92.223004

We study quantum feedback cooling of atomic motion in an optical cavity as a prototypical nonlinear quantum control problem. We design a feedback algorithm that can cool the atom to the ground state of the optical potential with high efficiency despite the nonlinear nature of this problem. An important ingredient is a simplified state-estimation algorithm, necessary for a real-time implementation of the feedback loop. We also describe the critical role of parity dynamics in the cooling process and present a simple theory that predicts the achievable steady-state atomic energies.

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