APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011;
Dallas, Texas
Abstract: X15.00001 : Quantum information in silicon: Initialization, manipulation, storage and readout
2:30 PM–3:06 PM
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Author:
Spin qubits in silicon are exciting because of
their long coherence times [1] and the electrical readout of the
state of one electron spin [2]. In a single experiment we
demonstrate initialization [3], manipulation, storage and
electrical readout of quantum information with a small ensemble
of phosphorus electronic and nuclear spins in silicon [4]. Our
electrical readout does not destroy the electron spin coherence
which is limited instead by naturally-occurring $^{29}$Si nuclear
spins. These experiments require a pulsed electron spin resonance
spectrometer operating at high magnetic fields [5].
Silicon quantum computers would benefit from having
a second dopant species which can be addressed selectively [6-8],
and we find that bismuth atoms are well suited for this role [9].
They offer long spin coherence times [9,10] as well as new
opportunities [11] when compared with phosphorus.
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[1] A M Tyryshkin {\&} S A Lyon, Phosphorus electron spin
coherence time can be over 10 s, Private communication (2010)
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[2] A Morello\textit{ et al}, Nature \textbf{467}, 687 (2010)
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[3] D R McCamey, J van Tol, G W Morley {\&} C Boehme, Phys Rev
Lett \textbf{102}, 027601 (2009)
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[4] G W Morley\textit{ et al}, Phys Rev Lett \textbf{101}, 07602
(2008)
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[5] G W Morley, L-C Brunel {\&} J van Tol, Rev Sci Instrum
\textbf{79}, 064703 (2008)
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[6] A M Stoneham, A H Harker {\&} G W Morley, J Phys Condens
Matter \textbf{21}, 364222 (2009)
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[7] A M Stoneham, A J Fisher {\&} P T Greenland, J Phys Condens
Matter \textbf{15}, L447 (2003)
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[8] P T Greenland\textit{ et al}, Nature \textbf{465}, 1057 (2010)
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[9] G W Morley\textit{ et al}, Nature Mater \textbf{9}, 725 (2010)
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[10] R E George\textit{ et al}, Phys Rev Lett \textbf{105},
067601 (2010)
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[11] M H Mohammady, G W Morley {\&} T S Monteiro, Phys Rev Lett
\textbf{105}, 067602 (2010)
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.X15.1