Weak values and the Leggett-Garg inequality in solid-state qubits.
An implementation of weak values is investigated in solid-state qubits. We demonstrate that a weak value can be nonclassical if and only if a Leggett-Garg inequality can also be violated. Generalized weak values are described in which post-selection occurs 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.
Williams
Nathan S
NS
Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.
Jordan
Andrew N
AN