Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Behbood N."'
Autor:
Mitchell Morgan W., Sewell R. J., Napolitano M., Koschorreck M., Dubost B., Behbood N., Kubasik M.
Publikováno v:
EPJ Web of Conferences, Vol 57, p 03004 (2013)
Quantum metrology uses quantum features such as entanglement and squeezing to improve the sensitivity of quantum-limited measurements. Long established as a valuable technique in optical measurements such as gravitational-wave detection, quantum metr
Externí odkaz:
https://doaj.org/article/8e51f203f00e48d29be9bc2b1e740b61
Autor:
Behbood, N., Ciurana, F. Martin, Colangelo, G., Napolitano, M., Toth, Geza, Sewell, R. J., Mitchell, M. W.
Publikováno v:
Phys. Rev. Lett. 113, 093601 (2014)
We report the generation of a macroscopic singlet state in a cold atomic sample via quantum non-demolition (QND) measurement induced spin squeezing. We observe 3 dB of spin squeezing and detect entanglement of up to $5.5\times10^5 $ atoms with $5\sig
Externí odkaz:
http://arxiv.org/abs/1403.1964
Autor:
Sewell, R. J., Napolitano, M., Behbood, N., Colangelo, G., Ciurana, F. Martin, Mitchell, M. W.
Publikováno v:
Physical Review X 4, 021045 (2014)
We study nonlinear interferometry applied to a measurement of atomic spin and demonstrate a sensitivity that cannot be achieved by any linear-optical measurement with the same experimental resources. We use alignment-to-orientation conversion, a nonl
Externí odkaz:
http://arxiv.org/abs/1310.5889
Autor:
Behbood, N., Napolitano, M., Colangelo, G., Ciurana, F. Martin, Sewell, R. J., Mitchell, M. W.
Publikováno v:
Phys. Rev. Lett. 111, 103601 (2013)
We describe a measurement-and-feedback technique to deterministically prepare low-entropy states of atomic spin ensembles. Using quantum non-demolition measurement and incoherent optical feedback, we drive arbitrary states in the spin-orientation spa
Externí odkaz:
http://arxiv.org/abs/1305.3290
Publikováno v:
Nature Photonics 7, 517 (2013)
Quantum non-demolition (QND) measurements improve sensitivity by evading measurement back-action. The technique was first proposed to detect mechanical oscillations in gravity wave detectors,and demonstrated in the measurement of optical fields, lead
Externí odkaz:
http://arxiv.org/abs/1303.2490
Publikováno v:
Phys. Rev. Lett. 108, 183602 (2012)
We study theoretically and experimentally the quantification of non-Gaussian distributions via non-destructive measurements. Using the theory of cumulants, their unbiased estimators, and the uncertainties of these estimators, we describe a quantifica
Externí odkaz:
http://arxiv.org/abs/1112.3814
Publikováno v:
Phys. Rev. Lett. 109, 253605 (2012)
We report the generation of spin squeezing and entanglement in a magnetically-sensitive atomic ensemble, and entanglement-enhanced field measurements with this system. A maximal Raman coherence is prepared in an ensemble of 8.5x10^5 laser-cooled Rb-8
Externí odkaz:
http://arxiv.org/abs/1111.6969
Publikováno v:
Nature 471, 486-489 (24 March 2011)
Quantum metrology studies the use of entanglement and other quantum resources to improve precision measurement. An interferometer using N independent particles to measure a parameter X can achieve at best the "standard quantum limit" (SQL) of sensiti
Externí odkaz:
http://arxiv.org/abs/1012.5787
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Akademický článek
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