Generation of Spin Entanglement in Nonequilibrium Quantum Dots

Abstract

We propose schemes for generating spatially-separated spin entanglement in systems of two quantum dots with onsite Coulomb repulsion weakly coupled to a joint electron reservoir. An enhanced probability for the formation of spin entanglement is found in nonequilibrium situations with one extra electron on each dot, either in the transient state after rapid changes of the gate voltage, or in the steady state with applied bias voltage. In both cases so-called Werner states with spin singlet fidelity exceeding 1/2 are generated, which indicates entanglement.

6 pages, 4 figures, replaced with version to be published in PRB

References in corpus (25)

• Quantum Cryptography
• Mixed State Entanglement and Quantum Error Correction
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Cited by in corpus (15)

• Spin-resolved Andreev transport through double-quantum-dot Cooper pair splitters
• Entanglement witnessing and quantum cryptography with non-ideal ferromagnetic detectors
• Tunable dynamical channel blockade in double-dot Aharonov-Bohm interferometers
• Effect of confinement potential geometry on entanglement in quantum dot-based nanostructures
• Inducing spin-correlations and entanglement in a double quantum dot through non-equilibrium transport
• Transient Dynamics of Confined Charges in Quantum Dots in the Sequential Tunnelling Regime
• Robust fermionic-mode entanglement of a nanoelectronic system in non-Markovian environments
• Adiabatic pumping through an interacting quantum dot with spin-orbit coupling
• Non-Markovian Dynamics of Charge Carriers in Quantum Dots
• Generation and detection of a spin entanglement in nonequilibrium quantum dots
• Generation of EPR pairs and interconversion of static and flying electron spin qubits
• Decoherence of an entangled state of a strongly-correlated double quantum dot structure through tunneling processes
• Large Spin Entangled Current from a Passive Device
• Geometry induced entanglement transitions in nanostructures
• A $\pi$-shaped Quantum Device for Implementation of Bell States in Solid State Environment