Abstract

A six-user quantum key distribution network implemented on a bus topology is experimentally demonstrated. The network employs the BB84 protocol to transmit cryptographic keys encoded unto the phase states of highly attenuated laser light to distances of up to 31 km in a standard telecommunication-grade fiber. Each user on the network is assigned a unique wavelength for communication with the network server at a time. The measured quantum bit error rate and sifted key rate compare favorably with theoretical results.

© 2006 IEEE

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Other (21)

C. H. Bennett and G. Brassard, "Quantum cryptography: Public key distribution and coin tossing", in Computers, Systems and Signal Processing, Bangalore, India, 1984, pp. 175-179.

C.-Z. Peng, et al. "Experimental free-space distribution of entangled photon pairs over 13 km: Towards satellite-based global quantum communication", Phys. Rev. Lett., vol. 94, no. 15, pp. 150501-1-150501-4, Apr. 2005.

D. Stucki, N. Gisin, O. Guinnard, G. Ribordy and H. Zbinden, "Quantum key distribution over 67 km with a plug & play system", New J. Phys., vol. 4, pp. 41.1-41.8, Mar. 2002.

D. S. Naik, C. G. Peterson, A. G. White, A. J. Berglund and P. G. Kwiat, "Entangled state quantum cryptography: Eavesdropping on the Ekert protocol", Phys. Rev. Lett., vol. 84, no. 20, pp. 4733-4736, May 2000.

"arXiv: Quant-ph/0403104", 2004.

R.J. Hughes, J.E. Nordholt, D. Derkacs and C.G. Peterson, "Practical free space quantum key distribution over 10 km in daylight and at night", New J Phys., vol. 4, pp. 43.1-43.14, May 2002.

N. Lutkenhaus, "Security against evesdropping in quantum cryptography", Phys. Rev. A, Gen. Phys., vol. 54, no. 1, pp. 97-111, Jul. 1996.

N. Gisin, G. Ribordy, W. Tittel and H. Zbinden, "Quantum cryptography", Rev. Mod. Phys., vol. 74, pp. 145-195, Jan 2002.

A. Muller, T. Herzog, B. Huttner, W. Tittel, H. Zbinden and N. Gisin, "‘Plug and Play’ systems for quantum cryptography", Appl. Phys. Lett., vol. 70, no. 7, pp. 793-795, Feb. 1997.

G. Ribordy, J.D. Gautier, N. Gisin, O. Guinnard and H. Zbinden, "Fast and user-friendly quantum key distribution", J. Mod Opt., vol. 47, no. 2/3, pp. 517-531, Feb. 2000.

D. S. Bethune and W. P. Risk, "An autocompensating fiber-optic quantum cryptography system based on polarization splitting of light", IEEE J. Quant. Elect., vol. 36, no. 3, pp. 340-347, Mar. 2000.

P. D. Kumavor, A. C. Beal, S. Yelin, E. Donkor and B. C. Wang, "Comparison of four multi-user quantum key distribution schemes over passive optical networks", J. Lightw. Technol., vol. 23, no. 1, pp. 268-276, Jan. 2005.

M. S. Goodman, et al. "Quantum cryptography for optical networks: A systems perspective", in Proc. IEEE-LEOS Conf., Tucson, AZ, Oct. 2003, pp. 1040-1041.

P. Toliver, et al. "Experimental investigation of quantum key distribution through transparent optical switch elements", IEEE Photon. Technol. Lett., vol. 15, no. 11, pp. 1669-1671, Nov. 2003.

C. Elliott, "Building the quantum network", New J. Phys., vol. 4, pp. 46.1-46.12, Jan. 2002.

P. D. Townsend, Quantum cryptography on multiuser optical fibre networks, London: U.K.: Nature, 1997,vol. 385, pp. 47-49.

P. D. Townsend, S. J. D. Phoenix, K. J. Blow and S. M. Barnett, "Design of quantum cryptography systems for passive optical networks", Electron. Lett., vol. 30, no. 22, pp. 1875-1877, Oct. 1994.

S. J. D. Phoenix, S. M. Barnett, P. D. Townsend and K. J. Blow, "Multi-user quantum cryptography on optical networks", J. Modern. Opt., vol. 42, no. 6, pp. 1155-1163, Jun. 1995.

M. Martinelli, "Time reversal for the polarization state in optical systems", J. Mod. Opt., vol. 39, no. 3, pp. 451-455, Mar. 1991.

D. Subacius, A. Zavriyev and A. Trifonov, "Backscattering limitation for fiber-optic quantum key distribution systems", Appl. Phys. Lett., vol. 86, pp. 011103-1-011103-3, Jan. 2005.

J.-C. Boileau, et al. "Robust polarization-based quantum key distribution over a collective-noise channel", Phys. Rev. Lett., vol. 92, no. 1, pp. 017901-1-017901-4, Jan. 2004.

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