560 citations
3 papers
quant-ph2005★ 19 cited
Comment on 'Secure Communication using mesoscopic coherent states', Barbosa et al, Phys Rev Lett 90, 227901 (2003)
Z. L. Yuan, A. J. Shields
In a recent letter, Barbosa et al [PRL 90, 227901(2003)] claim that secure communication is possible with bright coherent pulses, by using quantum noise to hide the data from an ea…
quant-ph2004★ 34 cited
Unconditionally secure quantum key distribution over 50km of standard telecom fibre
C. Gobby, Z. L. Yuan, A. J. Shields
We demonstrate a weak pulse quantum key distribution system using the BB84 protocol which is secure against all individual attacks, including photon number splitting. By carefully…
quant-ph2004★ 560 cited
Quantum key distribution over 122 km of standard telecom fiber
C. Gobby, Z. L. Yuan, A. J. Shields
We report the first demonstration of quantum key distribution over a standard telecom fiber exceeding 100 km in length. Through careful optimisation of the interferometer and singl…