Dipole Blockade and Quantum Information Processing in Mesoscopic Atomic Ensembles

Details Dipole Blockade and Quantum Information Processing in Mesoscopic Atomic Ensembles Dipole Blockade and Quantum Information Processing in Mesoscopic Atomic Ensembles

2000-11-07

arxiv.org/abs/quant-ph/0011028v1

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.87.037901

We describe a technique for manipulating quantum information stored in collective states of mesoscopic ensembles. Quantum processing is accomplished by optical excitation into states with strong dipole-dipole interactions. The resulting ``dipole blockade'' can be used to inhibit transitions into all but singly excited collective states. This can be employed for a controlled generation of collective atomic spin states as well as non-classical photonic states and for scalable quantum logic gates. An example involving a cold Rydberg gas is analyzed.

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