Entanglement between charge qubits induced by a common dissipative environment

Details Entanglement between charge qubits induced by a common dissipative environment Entanglement between charge qubits induced by a common dissipative environment

2007-10-18

arxiv.org/abs/0710.3576v1

Phys. Rev. B 77, 155420 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 7 figures

Scientific paper

10.1103/PhysRevB.77.155420

We study entanglement generation between two charge qubits due to the strong coupling with a common bosonic environment (Ohmic bath). The coupling to the boson bath is a source of both quantum noise (leading to decoherence) and an indirect interaction between qubits. As a result, two effects compete as a function of the coupling strength with the bath: entanglement generation and charge localization induced by the bath. These two competing effects lead to a non-monotonic behavior of the concurrence as a function of the coupling strength with the bath. As an application, we present results for charge qubits based on double quantum dots.

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