0310153v3

related topics
{cavity, atom, atoms}
{time, wave, function}
{measurement, state, measurements}
{state, algorithm, problem}
{state, states, coherent}
{level, atom, field}
{trap, ion, state}
{energy, state, states}
{cos, sin, state}
{light, field, probe}
{energy, gaussian, time}
{state, phys, rev}
{information, entropy, channel}

Quantum Feedback Control of Atomic Motion in an Optical Cavity

Daniel A. Steck, Kurt Jacobs, Hideo Mabuchi, Tanmoy Bhattacharya, Salman Habib

abstract: 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.

oai_identifier:
oai:arXiv.org:quant-ph/0310153
categories:
quant-ph
comments:
5 pages, 4 figures; v2 includes minor corrections (no content change); v3 includes minor wording/figure changes to match published PRL version
doi:
10.1103/PhysRevLett.92.223004
arxiv_id:
quant-ph/0310153
journal_ref:
Phys. Rev. Lett. 92 (2004) 223004
report_no:
LA-UR-03-6826
created:
2003-10-24
updated:
2004-06-24

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