Manipulating mesoscopic multipartite entanglement with atom-light interfaces
arXiv:0907.4261 · doi:10.1103/PhysRevA.80.062304
Abstract
Entanglement between two macroscopic atomic ensembles induced by measurement on an ancillary light system has proven to be a powerful method for engineering quantum memories and quantum state transfer. Here we investigate the feasibility of such methods for generation, manipulation and detection of genuine multipartite entanglement between mesoscopic atomic ensembles. Our results extend in a non trivial way the EPR entanglement between two macroscopic gas samples reported experimentally in [B. Julsgaard, A. Kozhekin, and E. Polzik, Nature {\bf 413}, 400 (2001)]. We find that under realistic conditions, a second orthogonal light pulse interacting with the atomic samples, can modify and even reverse the entangling action of the first one leaving the samples in a separable state.
8 pages, 6 figures
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- Gaussian conversion protocols for cubic phase state generation
- Composite Cluster States and Alternative Architectures for One- Way Quantum Computation
- Quantum Information with Continuous Variable systems
- Deterministic Gaussian conversion protocols for non-Gaussian single-mode resources
- A continuous-variable formalism for the Faraday atom-light interface
- Beyond pure state entanglement for atomic ensembles