Effective model of nonlinear circuit quantum electrodynamics

ORAL

Abstract

Superconducting electronic circuits containing nonlinear elements such as Josephson junctions are of interest for quantum information processing. The low-energy spectrum of such circuits can now be measured to a precision of better than one part per million. A precise knowledge of their Hamiltonian that goes beyond current models is thus desirable. In this talk I will show how to quantize a superconducting, weakly nonlinear circuit from the knowledge of its classical linear admittance matrix. This approach represents a change of paradigm in circuit quantum electrodynamics and may potentially become a useful alternative to the standard models based on the language of atomic physics and quantum optics.

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Authors

  • Simon Nigg

    Physics Department Yale University, Physics Department, Yale University

  • Michel Devoret

    Yale University, Applied Physics, Yale University, Applied Physics Department Yale University, Department of Applied Physics, Yale University, Departments of Physics and Applied Physics, Yale University, Applied Physics - Yale University, Yale University, Dept. of Applied Physics, Applied Physics Dept. Yale University

  • Steven Girvin

    Department of Physics, Yale University, Yale University, Physics Department Yale University, Physics Department, Yale University, Departments of Physics and Applied Physics, Yale University, New Haven, Connecticut 06520, USA