Environment-assisted precision measurement
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Environment-assisted precision measurement. / Goldstein, G.; Cappellaro, P.; Maze, J. R.; Hodges, J. S.; Jiang, L.; Sørensen, Anders Søndberg; Lukin, M. D.
In: Physical Review Letters, Vol. 106, No. 14, 08.04.2011, p. 140502.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Environment-assisted precision measurement
AU - Goldstein, G.
AU - Cappellaro, P.
AU - Maze, J. R.
AU - Hodges, J. S.
AU - Jiang, L.
AU - Sørensen, Anders Søndberg
AU - Lukin, M. D.
PY - 2011/4/8
Y1 - 2011/4/8
N2 - We describe a method to enhance the sensitivity of precision measurements that takes advantage of the environment of a quantum sensor to amplify the response of the sensor to weak external perturbations. An individual qubit is used to sense the dynamics of surrounding ancillary qubits, which are in turn affected by the external field to be measured. The resulting sensitivity enhancement is determined by the number of ancillas that are coupled strongly to the sensor qubit; it does not depend on the exact values of the coupling strengths and is resilient to many forms of decoherence. The method achieves nearly Heisenberg-limited precision measurement, using a novel class of entangled states. We discuss specific applications to improve clock sensitivity using trapped ions and magnetic sensing based on electronic spins in diamond
AB - We describe a method to enhance the sensitivity of precision measurements that takes advantage of the environment of a quantum sensor to amplify the response of the sensor to weak external perturbations. An individual qubit is used to sense the dynamics of surrounding ancillary qubits, which are in turn affected by the external field to be measured. The resulting sensitivity enhancement is determined by the number of ancillas that are coupled strongly to the sensor qubit; it does not depend on the exact values of the coupling strengths and is resilient to many forms of decoherence. The method achieves nearly Heisenberg-limited precision measurement, using a novel class of entangled states. We discuss specific applications to improve clock sensitivity using trapped ions and magnetic sensing based on electronic spins in diamond
U2 - 10.1103/PhysRevLett.106.140502
DO - 10.1103/PhysRevLett.106.140502
M3 - Journal article
C2 - 21561175
VL - 106
SP - 140502
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
ER -
ID: 33234902