Non-destructive discrimination of Bell states by NMR using a single ancilla qubit

Discrimination of Bell states plays an important role in a number of quantum computational protocols such as teleportation and secret sharing. However, most of the protocols dealing with Bell state discrimination in the literature either involve performing correlated measurements or destroying the e...

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Bibliographic Details
Published in:Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2010-05, Vol.43 (9), p.095508-095508
Main Authors: Samal, Jharana Rani, Gupta, Manu, Panigrahi, P K, Kumar, Anil
Format: Article
Language:English
Subjects:
Bells
Classical and quantum physics: mechanics and fields
Correlation analysis
Dealing
Discrimination
Entanglement
Exact sciences and technology
Nondestructive testing
Physics
Quantum information
Qubits (quantum computing)
Teleportation
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Summary:Discrimination of Bell states plays an important role in a number of quantum computational protocols such as teleportation and secret sharing. However, most of the protocols dealing with Bell state discrimination in the literature either involve performing correlated measurements or destroying the entanglement of the system. Here, we demonstrate an NMR-based experimental realization of a protocol for Bell state discrimination, following a scheme proposed by Gupta et al (quant-ph/0504183v1, 23 April 2005), which does not destroy the Bell state under consideration. Using the proposed protocol, one can deterministically distinguish the Bell states, without performing a measurement using the entangled basis. State discrimination is performed through two independent measurements on one ancilla qubit, which leaves the Bell states unchanged.
ISSN:0953-4075
1361-6455
DOI:10.1088/0953-4075/43/9/095508