Measurement of Two-Qubit States by a Two-Island Single Electron Transistor

Details Measurement of Two-Qubit States by a Two-Island Single Electron Transistor Measurement of Two-Qubit States by a Two-Island Single Electron Transistor

2003-09-29

arxiv.org/abs/cond-mat/0309648v1

Phy. Rev. B. vol. 69, p115301, (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.69.115301

We solve the master equations of two charged qubits measured by a
single-electron transistor (SET) consisted of two islands. We show that in the
sequential tunneling regime the SET current can be used for reading out results
of quantum calculations and providing evidences of two-qubit entanglement,
especially when the interaction between the two qubits is weak.

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