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 (4)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Counting statistics of coherent population trapping in quantum dots
• Lower bound for electron spin entanglement from beamsplitter current correlations
• Electron Fabry-Perot interferometer with two entangled magnetic impurities

Cited by in corpus (5)

• Tunable dynamical channel blockade in double-dot Aharonov-Bohm interferometers
• 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
• Large Spin Entangled Current from a Passive Device