Developments in quantum information processing by nuclear magnetic resonance: Use of quadrupolar and dipolar couplings

Kumar, Anil and Ramanathan, KV and Mahesh, TS and Sinha, N and Murali, KVR (2002) Developments in quantum information processing by nuclear magnetic resonance: Use of quadrupolar and dipolar couplings. In: Pramana - Journal of Physics, 59 (2). pp. 243-254.

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Abstract

Use of dipolar and quadrupolar couplings for quantum information processing (QIP) by nuclear magnetic resonance (NMR) is described. In these cases, instead of the individual spins being qubits, the 2(n) energy levels of the spin-system can be treated as an n-qubit system. It is demonstrated that QIP in such systems can be carried out using transition-selective pulses, in (CHCN)-C-3, (CH3CN)-C-13, Li-7 (I = 3/2) and Cs-133 (I = 7/2), oriented in liquid crystals yielding 2 and 3 qubit systems. Creation of pseudopure states, implementation of logic gates and arithmetic operations (half-adder and subtractor) have been carried out in these systems using transition-selective pulses.

Item Type:	Journal Article
Publication:	Pramana - Journal of Physics
Publisher:	Indian Academy of Sciences
Additional Information:	Copyright of this article belongs to Indian Academy of Sciences.
Keywords:	Quantum information processing;qubit;nuclear magnetic resonance quantum computing.
Department/Centre:	Division of Chemical Sciences > Sophisticated Instruments Facility (Continued as NMR Research Centre) Division of Physical & Mathematical Sciences > Physics
Date Deposited:	21 Jul 2011 07:22
Last Modified:	21 Jul 2011 07:22
URI:	http://eprints.iisc.ac.in/id/eprint/39142

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