|
related topics |
{cavity, atom, atoms} |
{time, wave, function} |
{measurement, state, measurements} |
{state, algorithm, problem} |
{level, atom, field} |
{light, field, probe} |
{trap, ion, state} |
{classical, space, random} |
{key, protocol, security} |
{information, entropy, channel} |
{photon, photons, single} |
{time, decoherence, evolution} |
{energy, gaussian, time} |
|
Strategies for Real-Time Position Control of a Single Atom in Cavity QED
T. W. Lynn, K. Birnbaum, H. J. Kimble
abstract: Recent realizations of single-atom trapping and tracking in cavity QED open
the door for feedback schemes which actively stabilize the motion of a single
atom in real time. We present feedback algorithms for cooling the radial
component of motion for a single atom trapped by strong coupling to
single-photon fields in an optical cavity. Performance of various algorithms is
studied through simulations of single-atom trajectories, with full dynamical
and measurement noise included. Closed loop feedback algorithms compare
favorably to open-loop "switching" analogs, demonstrating the importance of
applying actual position information in real time. The high optical information
rate in current experiments enables real-time tracking that approaches the
standard quantum limit for broadband position measurements, suggesting that
realistic active feedback schemes may reach a regime where measurement
backaction appreciably alters the motional dynamics.
- oai_identifier:
- oai:arXiv.org:quant-ph/0507064
- categories:
- quant-ph
- comments:
- 12 pages, 10 figures, submitted to J. Opt. B Quant. Semiclass. Opt
- doi:
- 10.1088/1464-4266/7/10/004
- arxiv_id:
- quant-ph/0507064
- created:
- 2005-07-06
Full article ▸
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