Non-equilibrium Entanglement and Noise in Coupled Qubits

Details Non-equilibrium Entanglement and Noise in Coupled Qubits Non-equilibrium Entanglement and Noise in Coupled Qubits

2006-02-03

arxiv.org/abs/cond-mat/0602063v1

Phys. Rev. B 75, 045340 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.75.045340

We study charge entanglement in two Coulomb-coupled double quantum dots in thermal equilibrium and under stationary non-equilibrium transport conditions. In the transport regime, the entanglement exhibits a clear switching threshold and various limits due to suppression of tunneling by Quantum Zeno localisation or by an interaction induced energy gap. We also calculate quantum noise spectra and discuss the inter-dot current correlation as an indicator of the entanglement in transport experiments.

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