Landau-Zener Transitions in an Adiabatic Quantum Computer

Details Landau-Zener Transitions in an Adiabatic Quantum Computer Landau-Zener Transitions in an Adiabatic Quantum Computer

2008-07-04

arxiv.org/abs/0807.0797v1

Phys. Rev. B 80, 012507 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

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.

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