Heralded amplification of photonic qubits

Optics Express
Natalia BrunoRob Thew

Abstract

We demonstrate postselection free heralded qubit amplification for Time-Bin qubits and single photon states in an all-fibre, telecom-wavelength, scheme that highlights the simplicity, stability and potential for fully integrated photonic solutions. Exploiting high-efficiency superconducting detectors, the gain, fidelity and the performance of the amplifier are studied as a function of loss. We also demonstrate the first heralded single photon amplifier with independent sources. This provides a significant advance towards demonstrating device-independent quantum key distribution as well as fundamental tests of quantum mechanics over extended distances.

References

Aug 7, 2007·Physical Review Letters·Antonio AcínValerio Scarani
Jun 4, 2008·Physical Review Letters·Peter J MosleyIan A Walmsley
Apr 7, 2010·Physical Review Letters·Franck FerreyrolPhilippe Grangier
Apr 16, 2013·Nature·Marissa GiustinaAnton Zeilinger
Oct 15, 2013·Physical Review Letters·B G ChristensenP G Kwiat
Feb 12, 2014·Optics Express·T GuerreiroR T Thew
Dec 11, 2014·Physical Review Letters·Maria FuwaAkira Furusawa
May 16, 2015·Physical Review Letters·F MonteiroN Sangouard

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Citations

Mar 5, 2016·Physical Review Letters·Evan Meyer-ScottThomas Jennewein

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