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We study charge entanglement in two Coulomb-coupled double quantum dots inthermal equilibrium and under stationary non-equilibrium transport conditions.In the transport regime, the entanglement exhibits a clear switching thresholdand various limits due to suppression of tunneling by Quantum Zeno localisationor by an interaction induced energy gap. We also calculate quantum noisespectra and discuss the inter-dot current correlation as an indicator of theentanglement in transport experiments.Comment: 4 pages, 4 figure

Nonequilibrium entanglement and noise in coupled qubits