Light qubit storage and retrieval using macroscopic atomic ensembles

Generation, Storage, and Retrieval of Nonclassical States of Light using Atomic Ensembles

This thesis presents the experimental demonstration of several novel methods for generating, storing, and retrieving nonclassical states of light using atomic ensembles, and describes applications of these methods to frequency-tunable single-photon generation, single-photon memory, quantum networks, and long-distance quantum communication. We first demonstrate emission of quantum-mechanically c...

Entanglement storage in atomic ensembles

– We propose to entangle macroscopic atomic ensembles in cavity using EPRcorrelated beams. We show how the field entanglement can be almost perfectly mapped onto the long-lived atomic spins associated with the ground states of the ensembles, and how it can be retrieved in the fields exiting the cavities after a variable storage time. Such a continuous variable quantum memory is of interest for ...

Theory of Light – Atomic Ensemble Interactions: Entanglement, Storage, and Retrieval

Quantum interface between light and atomic ensembles

PRL/v98/e113602.Chaudhury, S., G. A. Smith, K. Schulz, and P. S. Jessen, 2006, Phys. Rev. Lett. 96(4), 043001 (pages 4), URL http: //link.aps.org/abstract/PRL/v96/e043001. Chen, S., Y.-A. Chen, T. Strassel, Z.-S. Yuan, B. Zhao,J. Schmiedmayer, and J.-W. Pan, 2006, Phys. Rev. Lett. 97(17), 173004 (pages 4), URL http://link.aps.org/ abstract/PRL/v97/e173004.PRL/v97/e173004. Chen, S., Y.-A...

Storage and retrieval of light pulses in atomic media with “slow” and “fast” light

We report experimental evidence that light storage, understood as the controlled release of a light pulse by an atomic sample dependent on the past presence of a writing pulse, is not restricted to small-group-velocity media but can also occur in a negative-group-velocity medium. We present a numerical modeling in close agreement with our observations and a simple physical picture applicable to...