Journal
PHYSICAL REVIEW B
Volume 77, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.77.155420
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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 nonmonotonic behavior of the concurrence as a function of the coupling strength with the bath and, importantly, to steady-state entanglement. As an application, we present results for charge qubits based on double quantum dots.
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