Quantum control of the hyperfine-coupled electron and nuclear spins in alkali atoms
arXiv:0804.2920 · doi:10.1103/PhysRevA.78.023404
Abstract
We study quantum control of the full hyperfine manifold in the ground-electronic state of alkali atoms based on applied radio frequency and microwave fields. Such interactions should allow essentially decoherence-free dynamics and the application of techniques for robust control developed for NMR spectroscopy. We establish the conditions under which the system is controllable in the sense that one can generate an arbitrary unitary on the system. We apply this to the case of Cs with its dimensional Hilbert space of magnetic sublevels in the state, and design control waveforms that generate an arbitrary target state from an initial fiducial state. We develop a generalized Wigner function representation for this space consisting of the direct sum of two irreducible representation of SU(2), allowing us to visualize these states. The performance of different control scenarios is evaluated based on the ability to generate high-fidelity operation in an allotted time with the available resources. We find good operating points commensurate with modest laboratory requirements.
14 pages, 7 figures; corrected typos
References in corpus (9)
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Experimental demonstration of quantum memory for light
- Mapping photonic entanglement into and out of a quantum memory
- Quantum Control of the Hyperfine Spin of a Cs Atom Ensemble
- Efficient Quantum State Estimation by Continuous Weak Measurement and Dynamical Control
- Laserless trapped-ion quantum simulations without spontaneous scattering using microtrap arrays
- Why should anyone care about computing with anyons?
- Submicrometer position control of single trapped neutral atoms
- High-fidelity ion-trap quantum computing with hyperfine clock states