Efficient quantum entanglement distribution over an arbitrary collective-noise channel

Abstract

We present an efficient quantum entanglement distribution over an arbitrary collective-noise channel. The basic idea in the present scheme is that two parties in quantum communication first transmit the entangled states in the frequency degree of freedom which suffers little from the noise in an optical fiber. After the two parties share the photon pairs, they add some operations and equipments to transfer the frequency entanglement of pairs into the polarization entanglement with the success probability of 100\%. Finally, they can get maximally entangled polarization states with polarization independent wavelength division multiplexers and quantum frequency up-conversion which can erase distinguishability for frequency. Compared with conventional entanglement purification protocols, the present scheme works in a deterministic way in principle. Surprisingly, the collective noise leads to an additional advantage.

6 pages, 2 figures

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• Complete Bell-state analysis for superconducting-quantum-interference-device qubits with transitionless tracking algorithm
• Highly Efficient Processing Multi-photon States
• Single-photon-assisted entanglement concentration of a multi-photon system in a partially entangled W state with weak cross-Kerr nonlinearity
• Which verification qubits perform best for secure communication in noisy channel?
• Faithful entanglement sharing for quantum communication against collective noise
• Efficient polarization qubit transmission assisted by frequency degree of freedom
• Quantum key distribution based on orthogonal state encoding
• Schrödinger cat and Werner state disentanglement simulated by trapped ion systems
• Distributed quantum information processing via single atom driving
• Quantum key distribution over noisy channels by the testing state method