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Coherent state quantum key distribution with continuous-wave laser beams

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4 Author(s)
Symul, T. ; Dept. of Quantum Sci., Australian Nat. Univ., Canberra, ACT, Australia ; Sharma, V. ; Ralph, T.C. ; Lam, P.K.

Continuous variable quantum key distribution relies on the transmission of weakly modulated coherent states and the detection of optical field for secure communication. In this talk, we give an overview of recent developments in continuous variable quantum key distribution. In particular, we discuss a scheme that uses continuous-wave laser beams without optical pulsing. Due to its continuous wave nature, our scheme is intrinsically broadband and does not require measurement basis switching. Finally, we present a status report on integration of this system into existing communication infrastructures at the Parliamentary Triangle of Australia in Canberra.

Published in:

Optical Fiber Communication (OFC), collocated National Fiber Optic Engineers Conference, 2010 Conference on (OFC/NFOEC)

Date of Conference:

21-25 March 2010