Volume 87, Number 6, September 2009
|Number of page(s)||5|
|Published online||09 October 2009|
Secure quantum conversation through non-destructive discrimination of highly entangled multipartite states
Indian Institute of Technology-Bombay - Mumbai, 400076, India
2 Department of Information and communication technology, Royal Institute of Technology (KTH) SE-164 40 Kista, Sweden, EU
3 Indian Institute of Science Education and Research Kolkata, BCKV Campus Main Office - Mohanpur, 741252, India
4 Physical Research Laboratory - Navrangpura, Ahmedabad, 380 009, India
Accepted: 11 September 2009
“Quantum conversation” is a way in which two parties can communicate classical information with each other using entanglement as a shared resource. We present this scheme using a multipartite entangled state after describing its generation through appropriate circuit diagrams. We make use of a discrimination scheme which allows one to perform a measurement on the system without destroying its entanglement. We later prove that this scheme is secure in a noiseless and a lossless quantum channel.
PACS: 03.67.Hk – Quantum communication / 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)
© EPLA, 2009
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