The Physics of Quantum Information

• Research unit: EU RFP
• Project number: 95.0776

Key words (English)

Quantum cryptography; open quantum systems

Alternative project number (English)

EU project number: FMRXCT960087

Research programs (English)

EU-programme: 4. Frame Research Programme - 10.1 Stimulation of training and mobility

Short description (English)

See abstract

Partners and International Organizations (English)

Coordinator: Leopold-Franzens Universität Innsbruck (D)

Abstract (English)

This large European network provides an excellent forum for the exchange of ideas in the fast evolving field of quantum information theory and its physics aspects. In Geneva, we concentrated on the relation between the security of quantum cryptography protocols and Bell's inequalities. This relation provides a nice connection between a quite concrete question (how good must a quantum channel be to guaranty quantum security?) and an abstract question (how good must a quantum channel be to allow the demonstration of quantum nonlocality?). Several papers on this issue have been published within various international collaborations. In particular, in Phys. Rev. Lett. 87, 117901, 2001, we proved that for an entire class of quantum key distribution between n partner protocols, the qualities of the quantum channel required for security and for quantum nonlocality are exactly identical.

References in databases (English)

Swiss Database: Euro-DB of the
State Secretariat for Education and Research
Hallwylstrasse 4
CH-3003 Berne, Switzerland
Tel. [phone]
Swiss Project-Number: 95.0776