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Entanglement properties of optical coherent states under amplitude damping

Through concurrence, we characterize the entanglement properties of optical coherent-state qubits subject to an amplitude damping channel. We investigate the distillation capabilities of known error correcting codes and obtain upper bounds on the entanglement depending on the non-orthogonality of the coherent states and the channel damping parameter. This work provides a first, full quantitative analysis of these photon-loss codes which are naturally reminiscent of the standard qubit codes against Pauli errors.

preprint2011arXivOpen access
Ricardo WickertNadja Kolb BernardesPeter van Loock
quant-ph
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Open access3 authors1 topic
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Ricardo WickertNadja Kolb BernardesPeter van Loock

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