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Experimental demonstration of an efficient quantum phase-covariant cloning and its possible applications to simulating eavesdropping in quantum cryptography
Jiangfeng Du, Thomas Durt, Ping Zou +4
We describe a nuclear magnetic resonance (NMR) experiment which implements an efficient one-to-two qubit phase-covariant cloning machine(QPCCM). In the experiment we have achieved…
About economic qubit cloning
Thomas Durt, Jiangfeng Du
In this paper we establish a deep connection between the 3 qubit one-to-two phase-covariant quantum cloning network of Fuchs et al. [C. Fuchs, N. Gisin, R.B. Griffiths, C.S. Niu, a…
About Covariant Quartit Cloning Machines
Thomas Durt, Bob Nagler
The study of quantum cryptography and quantum entanglement has traditionally been based on two-level quantum systems (qubits) and more recently on three-level systems (qutrits). We…
Security of Quantum Key Distribution with entangled quNits
Thomas Durt, Dagomir Kaszlikowski, Jing-Ling Chen +1
We consider a generalisation of Ekert's entanglement-based quantum cryptographic protocol where qubits are replaced by quits (i.e., N-dimensional systems). In order to study its…