JETP Letters

, Volume 105, Issue 1, pp 47–50

Observation of a collective mode of an array of transmon qubits

  • K. V. Shulga
  • P. Yang
  • G. P. Fedorov
  • M. V. Fistul
  • M. Weides
  • A. V. Ustinov
Quantum Informatics

DOI: 10.1134/S0021364017010143

Cite this article as:
Shulga, K.V., Yang, P., Fedorov, G.P. et al. Jetp Lett. (2017) 105: 47. doi:10.1134/S0021364017010143
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Abstract

Arrays of transmon qubits coupled to a λ/2 superconducting coplanar waveguide resonator have been studied by microwave spectroscopy. The emergence of a collective mode has been discovered for a cluster of N > 5 qubits, whose coupling constant to the electromagnetic field in the resonator is √N times greater compared to a single qubit. In addition, the emergence of collective multiphoton transitions exciting higher levels of a qubit cluster has been demonstrated and the interaction of an individual qubit with such a cluster has been investigated.

Copyright information

© Pleiades Publishing, Inc. 2017

Authors and Affiliations

  • K. V. Shulga
    • 1
    • 2
    • 5
    • 6
  • P. Yang
    • 3
  • G. P. Fedorov
    • 5
    • 6
  • M. V. Fistul
    • 1
    • 4
    • 5
  • M. Weides
    • 3
  • A. V. Ustinov
    • 1
    • 3
    • 5
  1. 1.National Research Technological University MISiSMoscowRussia
  2. 2.Institute of Solid State PhysicsRussian Academy of SciencesChernogolovka, Moscow regionRussia
  3. 3.Physikalisches InstitutKarlsruhe Institute of TechnologyKarlsruheGermany
  4. 4.Theoretische Physik IIIRuhr-Universität BochumBochumGermany
  5. 5.Russian Quantum CenterSkolkovo, Moscow regionRussia
  6. 6.Moscow Institute of Physics and Technology (State University)Dolgoprudnyi, Moscow regionRussia

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