Partial-measurement back-action and non-classical weak values in a superconducting circuit

Autor:	Groen, J. P., Ristè, D., Tornberg, L., Cramer, J., de Groot, P. C., Picot, T., Johansson, G., DiCarlo, L.
Rok vydání:	2013
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Quantum Physics
Zdroj:	Phys. Rev. Lett. 111, 090506 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.111.090506
Popis:	We realize indirect partial measurement of a transmon qubit in circuit quantum electrodynamics by interaction with an ancilla qubit and projective ancilla measurement with a dedicated readout resonator. Accurate control of the interaction and ancilla measurement basis allows tailoring the measurement strength and operator. The tradeoff between measurement strength and qubit back-action is characterized through the distortion of a qubit Rabi oscillation imposed by ancilla measurement in different bases. Combining partial and projective qubit measurements, we provide the solid-state demonstration of the correspondence between a non-classical weak value and the violation of a Leggett-Garg inequality. Comment: 5 pages, 4 figures, and Supplementary Information (8 figures)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1302.5147 Zobrazit plný text záznamu View this record from Arxiv