A Hybrid Long-Distance Entanglement Distribution Protocol

Abstract

We propose a hybrid (continuous-discrete variable) quantum repeater protocol for distribution of entanglement over long distances. Starting from entangled states created by means of single-photon detection, we show how entangled coherent state superpositions, also known as `Schrödinger cat states', can be generated by means of homodyne detection of light. We show that near-deterministic entanglement swapping with such states is possible using only linear optics and homodyne detectors, and we evaluate the performance of our protocol combining these elements.

4 pages, 3 figures

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• Characterizations and Quantifications of Macroscopic Quantumness and Its Implementations using Optical Fields
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• Heralded generation of a micro-macro entangled state
• Long-distance twin-field quantum key distribution with entangled sources
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• Dynamical entanglement purification using chains of atoms and optical cavities
• Asymptotic state transformations of continuous variable resources
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• Towards quantum state tomography of a single polariton state of an atomic ensemble
• Efficient quantum repeater in perspectives of both entanglement concentration rate and LOCC complexity
• Controlled quantum teleportation between discrete and continuous physical systems
• Complete temporal mode characterization of non-Gaussian states by dual homodyne measurement
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• Satellite-based Distribution of Hybrid Entanglement
• Method to deterministically generate large-amplitude optical cat states
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• Teleportation of Hybrid Entangled States with Continuous-Variable Entanglement
• Scheme for the generation of hybrid entanglement between time-bin and wavelike encodings
• Hierarchical Quantum Network using Hybrid Entanglement
• Witnessing single-photon entanglement with local homodyne measurements: analytical bounds and robustness to losses
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• Generation of distributed entangled coherent states over a lossy environment with inefficient detectors
• Compasslike states in a thermal reservoir and fragility of their nonclassical features
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• On the Teleportation of Discrete Variable Qubits Via Continuous Variable Lossy Channels
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• Realistic limits on the nonlocality of an N-partite single-photon superposition
• Surface Entanglement in Quantum Spin Networks
• Implementable Hybrid Entanglement Witness
• Quantum repeater based on cavity-QED evolutions and coherent light
• Deterministic amplification of Schroedinger cat states in circuit quantum electrodynamics
• Wavelength conversion for single-photon polarization qubits through continuous variable quantum teleportation
• Photonic Hybrid State Entanglement Swapping using Cat State Superpositions
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• Hybrid Rabi interaction with traveling states of light
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• Engineering nonlinear boson-boson interactions using mediating spin systems