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Journal Article

Entanglement properties of optical coherent states under amplitude damping


van Loock,  Peter
van Loock Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Wickert, R., Bernardes, N. K., & van Loock, P. (2010). Entanglement properties of optical coherent states under amplitude damping. PHYSICAL REVIEW A, 81(6): 062344. doi:10.1103/PhysRevA.81.062344.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6AEB-5
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 nonorthogonality of the coherent states and the channel damping parameter. This work provides a full quantitative analysis of these photon-loss codes which are naturally reminiscent of the standard qubit codes against Pauli errors.