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

Samal, JR and Gupta, M and Panigrahi, PK and Kumar, A (2010) Non-destructive discrimination of Bell states by NMR using a single ancilla qubit. In: Journal of Physics B: Atomic, Molecular and Optical Physics, 43 (9).

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Abstract

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.

Item Type:	Journal Article
Publication:	Journal of Physics B: Atomic, Molecular and Optical Physics
Publisher:	Institute of Physics
Additional Information:	Copyright of this article belongs to Institute of Physics.
Department/Centre:	Division of Chemical Sciences > NMR Research Centre (Formerly Sophisticated Instruments Facility) Division of Physical & Mathematical Sciences > Physics
Date Deposited:	15 Jul 2010 09:05
Last Modified:	19 Sep 2010 06:10
URI:	http://eprints.iisc.ac.in/id/eprint/28956

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