Scalable quantum computing with atomic ensembles

Details Scalable quantum computing with atomic ensembles Scalable quantum computing with atomic ensembles

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12i3032b&link_type=abstract

New Journal of Physics, Volume 12, Issue 9, pp. 093032 (2010).

Physics

2

Scientific paper

Atomic ensembles, comprising clouds of atoms addressed by laser fields, provide an attractive system for both the storage of quantum information and the coherent conversion of quantum information between atomic and optical degrees of freedom. We describe a scheme for full-scale quantum computing with atomic ensembles, in which qubits are encoded in symmetric collective excitations of many atoms. We consider the most important sources of error—imperfect exciton-photon coupling and photon losses—and demonstrate that the scheme is extremely robust against these processes: the required photon emission and collection efficiency threshold is gsim86%. Our scheme uses similar methods to those already demonstrated experimentally in the context of quantum repeater schemes and yet has information processing capabilities far beyond those proposals.

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