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ics Colloquium
Friday, March 27, 2009
4:00 PM
Physics Building, Room 204
Note special time.
Thad Walker [Host: Tom Gallagher]
University of Wisconsin
"Quantum Manipulation of Neutral Atoms Without Forces"
 Slideshow (PDF)
Interactions between pairs of Rydberg atoms can be so strong that the energy level structure of one atom is dramatically altered by the presence of a second atom 10 microns away. This "Rydberg blockade" is predicted to allow conditional quantum manipulation of individual atoms based on the quantum state of a distant neighboring atom. When successful, the resulting entanglement process occurs without the atoms experiencing any significant interatomic forces. I will describe experiments at the University of Wisconsin that demonstrate blockade-conditioned coherent evolution of a single Rb atom based on the quantum state of a second atom 11 microns away. Extensions of these ideas to deterministic single atom and single photon sources with atomic ensembles will be presented.

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