Strategies for Real-Time Position Control of a Single Atom in Cavity QED
arXiv:quant-ph/0507064 · doi:10.1088/1464-4266/7/10/004
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.
arXiv comment12 pages, 10 figures, submitted to J. Opt. B Quant. Semiclass. Opt
References in corpus (10)
- Quantum state transfer and entanglement distribution among distant nodes in a quantum network
- Trapping of single atoms in cavity QED
- Cavity cooling of a single atom
- State-Insensitive Cooling and Trapping of Single Atoms in an Optical Cavity
- Full observation of single-atom dynamics in cavity QED
- State and dynamical parameter estimation for open quantum systems
- Trapping of Single Atoms with Single Photons in Cavity QED
- Cooling of a single atom in an optical trap inside a resonator
- Programmable Logic Devices in Experimental Quantum Optics
- Standard Quantum Limits for broadband position measurement