Entanglement generation in persistent current qubits

Details Entanglement generation in persistent current qubits Entanglement generation in persistent current qubits

2004-01-20

arxiv.org/abs/cond-mat/0401358v3

Phys. Rev. B 70, 144527 (2004)

Physics

Condensed Matter

Superconductivity

7 pages, 4 figures, minor changes in reply to referees comments

Scientific paper

10.1103/PhysRevB.70.144527

In this paper we investigate the generation of entanglement between two persistent current qubits. The qubits are coupled inductively to each other and to a common bias field, which is used to control the qubit behaviour and is represented schematically by a linear oscillator mode. We consider the use of classical and quantum representations for the qubit control fields and how fluctuations in the control fields tend to suppress entanglement. In particular, we demonstrate how fluctuations in the bias fields affect the entanglement generated between persistent current qubits and may limit the ability to design practical systems.

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