Superexchange blockade in triple quantum dots

Abstract

We propose the interaction of two electrons in a triple quantum dot as a minimal system to control long range superexchange transitions. These are probed by transport spectroscopy. Narrow resonances appear indicating the transfer of charge from one side of the sample to the other with the central one being occupied only virtually. We predict that two different intermediate states establish the two arms of a one dimensional interferometer. Configurations of destructive interference of the two superexchage trajectories totally block the current through the system. We emphasize the role of spin correlations giving rise to lifetime-enhanced resonances.

5 pages, 4 figures. Published version

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Cited by in corpus (21)

• Semiconductor Spin Qubits
• Three-electron spin qubits
• Coherent spin-exchange via a quantum mediator
• Long-range spin transfer in triple quantum dots
• Dark states in a carbon nanotube quantum dot
• Dephasing-assisted transport in linear triple quantum dots
• Long-range Exchange Interaction in Triple Quantum Dots in the Kondo Regime
• Photon assisted long-range tunneling
• Fast Long-Distance Control of Spin Qubits by Photon Assisted Cotunneling
• Channel Blockade in a Two-Path Triple-Quantum-Dot System
• Coupled Landau-Zener-Stuckelberg Quantum Dot Interferometers
• Low-Error Operation of Spin Qubits with Superexchange Coupling
• Coherent Long-Range Thermoelectrics in Nonadiabatic Driven Quantum Systems
• Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
• Dynamical second-order noise sweetspots in resonantly driven spin qubits
• Distinguishing coherent from incoherent charge transport in linear triple quantum dots
• Formation of multiple quantum dots in ZnO heterostructures
• Making the Virtual Real: Measurement-Powered Tunneling Engines
• Pauli Spin Blockade in a Resonant Triple Quantum Dot Molecule
• Universal control of superexchange in linear triple quantum dots with an empty mediator
• Long-range spin transport in asymmetric quadruple quantum dots configurations