Bonn 2000 – wissenschaftliches Programm
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Q: Quantenoptik
Q 43: Quanteninformation IV
Q 43.5: Vortrag
Freitag, 7. April 2000, 13:00–13:15, HS X
Driving Atoms Into Decoherence-Free States — •Almut Beige1, Daniel Braun2, and Peter L. Knight1 — 1Blackett Laboratory, Imperial College London, London SW7 2BZ, England — 2FB7, Universität-GHS Essen, 45117 Essen, Germany
We describe the decoherence-free subspace of N atoms in a cavity, in which decoherence due to the leakage of photons through the cavity mirrors is suppressed. We show how the states of the subspace can be entangled with the help of weak laser pulses, using the high decay rate of the cavity field and strong coupling between the atoms and the resonator mode. The atoms remain decoherence-free with a probability which can, in principle, be arbitrarily close to unity.