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Magnetic Field Sensing Beyond the Standard Quantum Limit Using 10-Spin NOON States
Abstract
Quantum-Enhanced Measurement: The single electron spin in a molecule, atom, or quantum dot precesses in a magnetic field and so can be used as a magnetic field sensor. As the number of spins in a sensor increases, so too does the sensitivity. Quantum mechanical entanglement of the spin ensemble should then allow the sensitivity to increase much more than would be expected from a simple increase in the number of individual spins in the ensemble. Using the highly symmetric molecule, trimethyl phosphite, a molecule containing a central P atom surrounded by nine hydrogen atoms, Jones et al. (p. 1166 , published online 23 April) quantum mechanically entangled the 10 spins (or qubits) to generate a nearly 10-fold enhancement in the magnetic field sensitivity. The results pave the way for the further development of quantum sensors.
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An algorithmic benchmark for quantum information processing
Knill, E., Laflamme, R., Martinez, R., & Tseng, C.-H. (2000) · Nature · doi:10.1038/35006012 · Cited by 290
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Braun, D., Adesso, G., Benatti, F., Floreanini, R., Marzolino, U., Mitchell, M. W., & Pirandola, S. (2018) · Reviews of Modern Physics · doi:10.1103/revmodphys.90.035006 · Cited by 434
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D'Ambrosio, V., Spagnolo, N., Del Re, L., Slussarenko, S., Li, Y., Kwek, L. C., Marrucci, L., Walborn, S. P., Aolita, L., & Sciarrino, F. (2013) · Nature Communications · doi:10.1038/ncomms3432 · Cited by 351
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Self-citationOptimal adaptive control for quantum metrology with time-dependent Hamiltonians
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Metadata
- Authors
- Jones, J. A., Karlen, S. D., Fitzsimons, J., Ardavan, A., Benjamin, S. C., Briggs, G. A. D., & Morton, J. J. L.
- Venue
- Science
- Published
- 2009-05-29
- Volume
- 324
- Issue
- 5931
- Pages
- 1166-1168
- ISSN
- 0036-8075
- 1095-9203
- Cited by
- 263
- References
- 3
- Language
- en
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