Quantum repeater via entangled phase modulated multimode coherent states

Abstract

We present a scheme of quantum repeater that uses entangled multimode coherent states which are obtained by electro-optic modulation of symmetric and antisymmetric Schrödinger cat states. In this method subcarrier modes of the phase modulated states generated by the remote parties are sent to a symmetric beam splitter at the central node. The entangled coherent states are heraldedly prepared by photon counting measurements at the output channels of the beam splitter. We study how the effects of decoherence in the quantum channel affect statistics of photocounts and corresponding fidelity. We show how the proposed scheme can be useful for extending range of quantum key distribution with sub carrier wave encoding by exploiting quantum teleportation with the generated entanglement.

18 pages, 10 figures

References in corpus (15)

• Quantum metrology from a quantum information science perspective
• Generation of a superposition of odd photon number states for quantum information networks
• Towards real-world quantum networks: a review
• Tools for quantum network design
• Remote distribution of non-classical correlations over 1250 modes between a telecom photon and a ${}^{171}$Yb${}^{3+}$:Y${}_2$SiO${}_5$ crystal
• A flying Schrödinger cat in multipartite entangled states
• A long-lived solid-state optical quantum memory for high-rate quantum repeaters
• Quantum memories for fundamental science in space
• Toward a Quantum Memory in a Fiber Cavity Controlled by Intracavity Frequency Translation
• Broadband quantum memory in a cavity via zero spectral dispersion
• Efficient quantum repeater in perspectives of both entanglement concentration rate and LOCC complexity
• Entanglement generation in a quantum network with finite quantum memory lifetime
• Plug&Play subcarrier wave quantum key distribution with deep modulation
• Toward a quantum repeater protocol based on the coherent state approach
• Using a Heterodyne Detection Scheme in a Subcarrier Wave Quantum Communication System

Cited by in corpus (1)

• 1xN DWDM channel selective quantum frequency conversion