Quantum-information processing for a coherent superposition state via a mixedentangled coherent channel

By H. Jeong, Myungshik S. Kim, Jinhyoung Lee. 2001

263 citations recorded by the source corpus.

An entangled two-mode coherent state is studied within the framework of $2\times 2$ dimensional Hilbert space. An entanglement concentration scheme based on joint Bell-state measurements is worked out. When the entangled coherent state is embedded in vacuum environment, its entanglement is degraded but not totally lost. It is found that the larger the initial coherent amplitude, the faster entanglement decreases. We investigate a scheme to teleport a coherent superposition state while considering a mixed quantum channel. We find that the decohered entangled coherent state may be useless for quantum teleportation as it gives the optimal fidelity of teleportation less than the classical limit 2/3.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/12e9380d33790a24a688e2a5c37abc902b6bb39c

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Linear optical quantum computing with photonic qubits (2005, background): “For example Bell measurements and fan-out gates become deterministic elements (van Enk and Hirota 2002; Jeong et al. 2001).”
Preparation of non-local superpositions of quasi-classical light states (2009, background): “For φ = 0, this is the coherent Bell state |ψ0〉 above, proposed as a resource to teleport coherent qubits |ξ〉 = a|α〉+b|−α〉 [7, 18]: mixing |ξ〉 with the mode 1 on a 50/50 BS and counting photons in the output ports projects the mode 2 into |ξ〉, with the usual bit- and phase- ips depending on which co”