Landau-Zener Transitions in an Adiabatic Quantum Computer

Autor:	Johansson, J., Amin, M. H. S., Berkley, A. J., Bunyk, P., Choi, V., Harris, R., Johnson, M. W., Lanting, T. M., Lloyd, Seth, Rose, G.
Rok vydání:	2008
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity Quantum Physics
Zdroj:	Phys. Rev. B 80, 012507 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.80.012507
Popis:	We report an experimental measurement of Landau-Zener transitions on an individual flux qubit within a multi-qubit superconducting chip designed for adiabatic quantum computation. The method used isolates a single qubit, tunes its tunneling amplitude Delta into the limit where Delta is much less than both the temperature T and the decoherence-induced energy level broadening, and forces it to undergo a Landau-Zener transition. We find that the behavior of the qubit agrees to a high degree of accuracy with theoretical predictions for Landau-Zener transition probabilities for a double-well quantum system coupled to 1/f magnetic flux noise. Comment: 4 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0807.0797 Zobrazit plný text záznamu View this record from Arxiv