Heralded amplification of photonic qubits

Abstract

We demonstrate heralded qubit amplification for Time-Bin and Fock-state qubits in an all-fibre, telecom-wavelength, scheme that highlights the simplicity, the stability and potential for fully integrated photonic solutions. Exploiting high-efficiency superconducting detectors, the gain, the fidelity and the performance of the amplifier are studied as a function of loss. We also demonstrate the first heralded Fock-state qubit amplifier without post-selection. This provides a significant advance towards demonstrating Device-Independent Quantum Key Distribution as well as fundamental tests of quantum mechanics over extended distances.

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Cited by in corpus (11)

• Photonic quantum information processing: a concise review
• Limits on the heralding efficiencies and spectral purities of spectrally-filtered single photons from photon pair sources
• Demonstration of EPR steering using single-photon path entanglement and displacement-based detection
• How far can one send a photon?
• Certifying the presence of a photonic qubit by splitting it in two
• Quantum-state texture and gate identification
• Heralded amplification of nonlocality via entanglement swapping for long-distance device-independent quantum key distribution
• Quantum channel correction outperforming direct transmission
• Hyperparallel transistor, router and dynamic random access memory with unity fidelities
• Implementations for Device-Independent Quantum Key Distribution
• Noiseless Loss Suppression for Entanglement Distribution