Quantum Information Processing

, Volume 8, Issue 2, pp 245–259

Interband transitions and interference effects in superconducting qubits

  • Antti Paila
  • Jani Tuorila
  • Mika Sillanpää
  • David Gunnarsson
  • Jayanta Sarkar
  • Yuriy Makhlin
  • Erkki Thuneberg
  • Pertti Hakonen
Article

DOI: 10.1007/s11128-009-0102-4

Cite this article as:
Paila, A., Tuorila, J., Sillanpää, M. et al. Quantum Inf Process (2009) 8: 245. doi:10.1007/s11128-009-0102-4

Abstract

We investigate phase-sensitive interference effects in a periodically sin(2π frft)-driven, artificial two-state system connected to a microwave resonator at fLC ≃ 800 MHz. We observe two kinds of multiphoton transitions in the two-state system, accompanied by: (1) Several quanta from the drive at frf and (2) one quantum at frf and several at fLC. The former are described using phase-sensitive Landau–Zener transitions, while the latter are discussed in terms of vibronic transitions in diatomic molecules. Interference effects in the vibronic transitions governed by Franck–Condon coefficients are also considered.

Keywords

Landau–Zener tunnelingSuperconducting qubitsMultiphoton transitionsFranck–Condon physicsAharonov–Anandan phase

PACS

85.25.Cp73.23.Hk85.35.Gv

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Antti Paila
    • 1
  • Jani Tuorila
    • 2
  • Mika Sillanpää
    • 1
  • David Gunnarsson
    • 1
  • Jayanta Sarkar
    • 1
  • Yuriy Makhlin
    • 3
  • Erkki Thuneberg
    • 2
  • Pertti Hakonen
    • 1
  1. 1.Low Temperature LaboratoryHelsinki University of TechnologyTKKFinland
  2. 2.Department of Physical SciencesUniversity of OuluOuluFinland
  3. 3.Landau Institute for Theoretical PhysicsMoscowRussia