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Long-range spin transfer in triple quantum dots

AutorSánchez, Rafael ; Platero, Gloria
Fecha de publicación2014
EditorAmerican Physical Society
CitaciónPhysical Review Letters 112: 176803 (2014)
ResumenTunneling in a quantum coherent structure is not restricted to only nearest neighbors. Hopping between distant sites is possible via the virtual occupation of otherwise avoided intermediate states. Here we report the observation of long-range transitions in the transport through three quantum dots coupled in series. A single electron is delocalized between the left and right quantum dots, while the center one remains always empty. Superpositions are formed, and both charge and spin are exchanged between the outermost dots. The delocalized electron acts as a quantum bus transferring the spin state from one end to the other. Spin selection is enabled by spin correlations. The process is detected via the observation of narrow resonances which are insensitive to Pauli spin blockade. © 2014 American Physical Society.
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Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.112.176803
URIhttp://hdl.handle.net/10261/98896
DOI10.1103/PhysRevLett.112.176803
Identificadoresdoi: 10.1103/PhysRevLett.112.176803
e-issn: 1079-7114
issn: 0031-9007
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