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Session W46: Invited Session: Silicon Spin Qubits: Relaxation and Decoherence

11:15 AM–2:15 PM, Thursday, March 1, 2012
Room: 160AB

Sponsoring Units: DCMP GQI
Chair: Mark Eriksson, University of Wisconsin-Madison

Abstract ID: BAPS.2012.MAR.W46.4

Abstract: W46.00004 : Simulating a solid state spin qubit in a spin bath

1:03 PM–1:39 PM

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Author:

Wayne Witzel
(Sandia National Laboratories, NM)

Powerful computational methods have been developed in recent years for understanding decoherence induced by environmental spins. Specifically, the cluster correlation expansion [Phys. Rev. B 78, 085315 (2008)] and adaptations [Phys. Rev. Lett. 105, 187602 (2010)] provide successive approximations that approach the solution to the full quantum mechanical problem for small and large spin baths with good efficiency. With these methods, we are able to study the nature of spin-bath decoherence in various regimes, for different types of qubits (e.g., donors or quantum dots) and for different types of spin baths (e.g., nuclei or electrons). Our quantitative analyses have implications for solid state spin qubit prospects and materials choices. Sandia National Laboratories is a multiprogram laboratory operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.MAR.W46.4