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Optica Publishing Group
  • Laser 2001 - World of Photonics 15th International Conference on Lasers and Electrooptics in Europe
  • Technical Digest Series (Optica Publishing Group, 2001),
  • paper PS299

Quantum Key Distribution with Continuous Variables

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Quantum key distribution is the most advanced technology in the field of quantum information processing. Conventional implementations utilize discrete variable systems to realize the secure information transfer. However, in these setups the achievable data transmission rates are limited. A new development employs continuous variable systems [1], such as bright light fields, to obtain shorter key distribution times. Our scheme for a continuous variable system makes use of an easy to handle source of EPR-entanglement. In contrast to other continuous variable schemes we do not use predetermined bit values. Thus, the key generation process resembles the Ekert protocol which has proven to be successful for dichotomic variables.

© 2001 EPS

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