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Q: Fachverband Quantenoptik und Photonik
Q 56: Poster IV
Q 56.43: Poster
Donnerstag, 5. März 2009, 16:30–19:00, VMP 9 Poster
Atomic Ensemble in an Optical Dipole Trap as Quantum Memory — •Valentin Hagel1, Thorsten Strassel1, Bo Zhao1, Zhen-Sheng Yuan1, Shuai Chen1,2, and Jian-Wei Pan1,2 — 1Physikalisches Institut, Universität Heidelberg, Germany — 2Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei, China
Quantum memory is a device which allows to store and retrieve quantum information. Realization of a quantum memory with long storage times allows for long distance quantum communication. Current implementations are limited to short storage times due to dephasing in residual magnetic fields and thermal atomic motion. In our setup the atoms are confined in a red-detuned, far-off resonant optical dipole trap during the storage-process: Raman-scattering of a weak, off-resonant write pulse imprints a collective atomic state in the ensemble which can be converted back into a defined photonic mode by a strong read-pulse. We provide a range of experimental results on the use of atomic ensembles as a light-matter interface. Moreover we report on techniques to achieve long storage times and further improvements.