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Q: Quantenoptik
Q 40: Quanteneffekte IV
Q 40.1: Talk
Thursday, March 19, 1998, 11:00–11:15, R 513
Inverting quantum jumps in the motional state of an ion — •J. Steinbach1, J. Twamley2, and P. L. Knight1 — 1Optics Section, Blackett Laboratory, Imperial College, London SW7 2BZ, UK — 2Department of Mathematical Physics, National University of Ireland, Maynooth, Co. Kildare, Eire.
We present a scheme to detect and invert quantum jumps in the quantized centre of mass motion of a single trapped ion. We asssume the ion to be confined in a harmonic trap potential and consider motional decoherence using the quantum jump approach. Given the ion in an unknown superposition of two specific motional states we show how a quantum jump can be detected by employing the ion’s electronic degrees of freedom. The action of the quantum jump on the motional state can then be inverted and the initial superposition state preserved.