Quantum information processing with electron spin resonance

Arzhang Ardavan 

University of Oxford, Department of Physics, The Clarendon Laboratory, Parks Road, Oxford OX13PU, United Kingdom

Abstract

Electron spin systems were among the earliest proposed physical embodiments of quantum information processors. We have addressed a range of basic questions surrounding the practicalities of exploiting electron spins as qubits. We have shown that electron spin resonance can be used to perform quantum gates with a very high fidelity. We have studied the prospects for application of various candidate spin systems including N@C60 (a nitrogen atom encapsulated in a fullerene cage), molecular nanomagnets and phosphorus donors in silicon (P:Si). While in molecular nanomagnets the presence of magnetic nuclei in the vicinity of the electron qubit provides the dominant decoherence path, we have found that in N@C60 and P:Si nuclear moments can provide a valuable subsidiary resource in a quantum information processor.

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Presentation: Invited oral at E-MRS Fall Meeting 2009, Symposium E, by Arzhang Ardavan
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-05-25 10:48
Revised:   2009-06-07 00:48
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