Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 6: Quanteninformation (Atome und Ionen II)

Q 6.8: Talk

Monday, March 10, 2008, 18:15–18:30, 1B

A quantum memory of light in nuclear spins of a quantum dot — •Heike Schwager, Geza Giedke, and Ignacio Cirac — Max-Planck Institut für Quantenoptik, 85748 Garching

A quantum memory is an essential building block for quantum information and communication. Nuclear spins have long decoherence times and are thus a good candidate for a quantum memory.

We couple the field of an optical microcavity to the polarized nuclear spins of a charged quantum dot by a detuned Raman process. Eliminating the trion, we show that STIRAP allows to map the state of the cavity field to the nuclei. Similar techniques can be used to generate two-mode squeezed states of the nuclear spin-cavity system, enabling e.g. a light matter interface through teleportation.