Journal article
Substitutional nickel impurities in diamond: decoherence-free subspaces for quantum information processing
Europhysics letters, Vol.99(6), p.67006
12/19/2011
DOI: 10.1209/0295-5075/99/67006
Abstract
The electronic and magnetic properties of a neutral substitutional nickel
(Ni$_s^0$) impurity in diamond are studied using density functional theory in
the generalized gradient approximation. The spin-one ground state consists of
two electrons with parallel spins, one located on the nickel ion in the $3d^9$
configuration and the other distributed among the nearest-neighbor carbons. The
exchange interaction between these spins is due to $p-d$ hybridization and is
controllable with compressive hydrostatic or uniaxial strain, and for
sufficient strain the antiparallel spin configuration becomes the ground state.
Hence, the Ni impurity forms a controllable two-electron exchange-coupled
system that should be a robust qubit for solid-state quantum information
processing.
Details
- Title: Subtitle
- Substitutional nickel impurities in diamond: decoherence-free subspaces for quantum information processing
- Creators
- Thomas Chanier - University of IowaCraig Pryor - University of IowaMichael E Flatté
- Resource Type
- Journal article
- Publication Details
- Europhysics letters, Vol.99(6), p.67006
- DOI
- 10.1209/0295-5075/99/67006
- ISSN
- 0295-5075
- eISSN
- 1286-4854
- Language
- English
- Date published
- 12/19/2011
- Academic Unit
- Electrical and Computer Engineering; Physics and Astronomy
- Record Identifier
- 9984199797802771
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