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Magnetic field sensors using 13-spin cat states

Source: Phys. Rev. A 82, 022330 (2010); doi:10.1103/PhysRevA.82.022330

Published 26 August 2010

PACS
  • 03.67.Mn
    Entanglement measures, witnesses, and other characterizations (quantum information)
  • 07.55.Ge
    Magnetometers for magnetic field measurements
  • 76.60.-k
    Nuclear magnetic resonance and relaxation (condensed matter)
  • YEAR: 2010
PUBLICATION DATA
ISSN:
1553-9644 (online)
Publisher:
AIP is a member of CrossRef APS
Stephanie Simmons,1 Jonathan A. Jones,2 Steven D. Karlen,1 Arzhang Ardavan,2 and John J. L. Morton1,2
1Department of Materials, Oxford University, Oxford OX1 3PH, United Kingdom
2CAESR, Clarendon Laboratory, Oxford University, Oxford OX1 3PU, United Kingdom
Measurement devices could benefit from entangled correlations to yield a measurement sensitivity approaching the physical Heisenberg limit. Building upon previous magnetometric work using pseudoentangled spin states in solution-state NMR, we present two conceptual advancements to better prepare and interpret the pseudoentanglement resource. We apply these to a 13-spin cat state to measure the local magnetic field with a 12.2 sensitivity increase over an equivalent number of isolated spins. ©2010 The American Physical Society
History: Received 9 July 2009; published 26 August 2010
Permalink: http://link.aps.org/abstract/PRA/v82/e022330
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