Quantum repeaters free of polarization disturbance and phase noise

Abstract

Original quantum repeater protocols based on single-photon interference suffer from phase noise of the channel, which makes the long-distance quantum communication infeasible. Fortunately, two-photon interference type quantum repeaters can be immune to phase noise of the channel. However, this type quantum repeaters may still suffer from polarization disturbance of the channel. Here we propose a quantum repeaters protocol which is free of polarization disturbance of the channel based on the invariance of the anti-symmetric Bell state $|{\psi }^{-}>=(|H>|V>-|V>|H>)/\sqrt{2}$ under collective noise. Our protocol is also immune to phase noise with the Sagnac interferometer configuration. Through single-atom cavity-QED technology and linear optics, this scheme can be implemented easily.

5 pages, 2 figures

References in corpus (20)

• Quantum Cryptography
• Long-distance quantum communication with atomic ensembles and linear optics
• Generation of Nonclassical Photon Pairs for Scalable Quantum Communication with Atomic Ensembles
• Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
• Measurement-Induced Entanglement for Excitation Stored in Remote Atomic Ensembles
• Experimental demonstration of a BDCZ quantum repeater node
• Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks
• Fault-tolerant Quantum Communication with Minimal Physical Requirements
• Fault-tolerant quantum repeaters with minimal physical resources, and implementations based on single photon emitters
• Memory-built-in quantum teleportation with photonic and atomic qubits
• Long-Distance Entanglement Distribution with Single-Photon Sources
• Robust creation of entanglement between remote memory qubits
• Intrinsic-Stabilization Uni-Directional Quantum Key Distribution Between Beijing and Tianjin
• Robust and Efficient Quantum Repeaters with Atomic Ensembles and Linear Optics
• A Robust Atom-Photon Entanglement Source for Quantum Repeaters
• Fault-tolerant quantum repeater with atomic ensembles and linear optics
• Phase noise measurements in long fiber interferometers for quantum repeaters applications
• Robust Quantum Communication Using A Polarization-Entangled Photon Pair
• Experimental Quantum Communication without a Shared Reference Frame
• Stability of Phase-modulated Quantum Key Distribution System

Cited by in corpus (2)

• Efficient quantum repeater based on deterministic Rydberg gates
• Heralded high-efficiency quantum repeater with atomic ensembles assisted by faithful single-photon transmission