Zeno and anti-Zeno polarization control of spin-ensembles by induced dephasing
arXiv:1008.5122 · doi:10.1103/PhysRevLett.105.160401
Abstract
We experimentally and theoretically demonstrate the purity (polarization) control of qubits entangled with multiple spins, using induced dephasing in nuclear magnetic resonance (NMR) setups to simulate repeated quantum measurements. We show that one may steer the qubit ensemble towards a quasi-equilibrium state of certain purity, by choosing suitable time intervals between dephasing operations. These results demonstrate that repeated dephasing at intervals associated with the anti-Zeno regime lead to ensemble purification, whereas those associated with the Zeno regime lead to ensemble mixing.
Main Text: 5 pages, 2 figures. Sup. Inf.: 5pages, 1 figure
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