Weak values and the Leggett-Garg inequality in solid-state qubits

Details Weak values and the Leggett-Garg inequality in solid-state qubits Weak values and the Leggett-Garg inequality in solid-state qubits

2007-07-23

arxiv.org/abs/0707.3427v1

Phys. Rev. Lett. 100, 026804 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.100.026804

An implementation of weak values is investigated in solid-state qubits. We demonstrate that a weak value can be non-classical if and only if a Leggett-Garg inequality can also be violated. Generalized weak values are described, where post-selection on a range of weak measurement results. Imposing classical weak values permits the derivation of Leggett-Garg inequalities for bounded operators. Our analysis is presented in terms of kicked quantum nondemolition measurements on a quantum double-dot charge qubit.

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