Long-range spin transfer in triple quantum dots

Abstract

Tunneling in a quantum coherent structure is not restricted to only nearest neighbours. 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 centre one remains always empty. Superpositions are formed and both charge and spin are exchanged between the outermost dots. Detection of the process is achieved via the observation of narrow resonances, insensitive to the transport Pauli spin blockade.

5 pages, 4 figures. Published version

References in corpus (8)

• Prospects for Spin-Based Quantum Computing
• Coherent electronic transfer in quantum dot systems using adiabatic passage
• Coherent spin manipulation in an exchange-only qubit
• An electrostatically defined serial triple quantum dot charged with few electrons
• All-electronic coherent population trapping in quantum dots
• The 3D transport diagram of a triple quantum dot
• Superexchange blockade in triple quantum dots
• Dark Bell states in tunnel-coupled spin qubits

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• Co-tunneling spin blockade observed in a three-terminal triple quantum dot
• Floquet Majorana Fermions in superconducting quantum dots
• Orbital and electronic entanglement in quantum teleportation schemes
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• Distinguishing coherent from incoherent charge transport in linear triple quantum dots
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• Universal control of superexchange in linear triple quantum dots with an empty mediator
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