Single-photon entanglement concentration for long-distance quantum communication
Quantum Information & Computation
Multipartite electronic entanglement purification using quantum-dot spin and microcavity system
Quantum Information Processing
High-efficiency multipartite entanglement purification of electron-spin states with charge detection
Quantum Information Processing
Efficient entanglement concentration for arbitrary less-entangled NOON states
Quantum Information Processing
Efficient entanglement concentration for quantum dot and optical microcavities systems
Quantum Information Processing
Two-step entanglement concentration for arbitrary electronic cluster state
Quantum Information Processing
Atomic entanglement purification using photonic Faraday rotation
Quantum Information Processing
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We present two entanglement concentration protocols (ECPs) for arbitrary three-electron W state based on their charges and spins. Different from other ECPs, with the help of the electronic polarization beam splitter and charge detection, the less-entangled W state can be concentrated into a maximally entangled state only with some single charge qubits. The second ECP is more optimal than the first one, for by constructing the complete parity check gate, the second ECP can be used repeatedly to further concentrate the less-entangled state and obtain a higher success probability. Therefore, both the ECPs especially the second one may be useful in current quantum information processing.