Phys. Rev. Lett. 104, 126401 (2010) [4 pages]Theory of Anisotropic Exchange in Laterally Coupled Quantum DotsReceived 20 August 2009; published 23 March 2010 The effects of spin-orbit coupling on the two-electron spectra in lateral coupled quantum dots are investigated analytically and numerically. It is demonstrated that in the absence of magnetic field, the exchange interaction is practically unaffected by spin-orbit coupling, for any interdot coupling, boosting prospects for spin-based quantum computing. The anisotropic exchange appears at finite magnetic fields. A numerically accurate effective spin Hamiltonian for modeling spin-orbit-induced two-electron spin dynamics in the presence of magnetic field is proposed. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.104.126401
DOI:
10.1103/PhysRevLett.104.126401
PACS:
71.70.Gm, 71.70.Ej, 73.21.La, 75.30.Et
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