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Harnessing nuclear spin polarization fluctuations in a semiconductor nanowire.
- Source :
-
Nature Physics . Oct2013, Vol. 9 Issue 10, p631-635. 5p. - Publication Year :
- 2013
-
Abstract
- Soon after the first measurements of nuclear magnetic resonance in a condensed-matter system, Bloch predicted the presence of statistical fluctuations proportional to in the polarization of an ensemble of N spins. Such spin noise has recently emerged as a critical ingredient for nanometre-scale magnetic resonance imaging. This prominence is a consequence of present magnetic resonance imaging resolutions having reached less than (100 nm)3, a size scale at which statistical spin fluctuations begin to dominate the polarization dynamics. Here, we demonstrate a technique that creates spin order in nanometre-scale ensembles of nuclear spins by harnessing these fluctuations to produce polarizations both larger and narrower than the thermal distribution. This method may provide a route to enhancing the weak magnetic signals produced by nanometre-scale volumes of nuclear spins or a way of initializing the nuclear hyperfine field of electron-spin qubits in the solid state. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17452473
- Volume :
- 9
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Nature Physics
- Publication Type :
- Academic Journal
- Accession number :
- 90493216
- Full Text :
- https://doi.org/10.1038/nphys2731