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Double-occupancy errors, adiabaticity, and entanglement of spin qubits in quantum dots

URN to cite this document:
urn:nbn:de:bvb:355-epub-282512
Schliemann, John ; Loss, Daniel ; MacDonald, A. H.
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Date of publication of this fulltext: 22 May 2013 13:32


Abstract

Quantum gates that temporarily increase singlet-triplet splitting in order to swap electronic spins in coupled quantum dots lead inevitably to a finite double-occupancy probability for both dots. By solving the time-dependent Schrödinger equation for a coupled dot model, we demonstrate that this does not necessarily lead to quantum computation errors. Instead, the coupled dot ground state evolves ...

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