Suppressing the instabilities of RF driven transmon by a kinetic inductive shunt - Part 2: Experimental results

ORAL

Abstract

The transmon is ubiquitous in circuit QED experiments due to its remarkable coherence properties and simplicity of design and fabrication. However, when strongly driven at microwave frequencies, the transmon exhibits various kinds of instabilities. Floquet-Markov theory indeed predicts such instabilities. Shunting the transmon with a linear inductance qualitatively changes the potential seen by the phase, thus increasing the device stability under certain conditions. We call the resulting qubit the inductively-shunted transmon (IST) to distinguish it from the RF SQUID. Comparison of driven transmons and ISTs with different implementations offers insights in eliminating these instabilities, and also sheds light on the fundamental problem of chaos in a strongly driven dissipative quantum system. This talk will focus on recent experimental results for such investigations.

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Presenters

  • Xu Xiao

    Applied Physics, Yale University

Authors

  • Xu Xiao

    Applied Physics, Yale University

  • Jayameenakshi Venkatraman

    Applied Physics, Yale University

  • Clarke Smith

    Applied Physics, Yale University

  • Zaki Leghtas

    Centre Automatique et Systèmes, Mines ParisTech, centre automatique et systèmes, Mines Paristech, Centre Automatique et Systmes, Mines-ParisTech, PSL Research University, 75006 Paris, France, Mines ParisTech / ENS Paris, Laboratoire Pierre Aigrain UMR 8551, Ecole normale Supérieure - PSL Research university, CNRS, Université Pierre et Marie Curie - Sorbonne Universités, Université Paris Dider, Centre Automatique et Systèmes, Mines-ParisTech and Laboratoire Pierre Aigrain, Ecole Normale Supérieure, Paris, France

  • Lucas Verney

    QUANTIC, INRIA, Paris

  • Mazyar Mirrahimi

    Yale Univ, Quantic Team, INRIA Paris, QUANTIC, INRIA Paris, QUANTIC, INRIA, Paris; YQI, Yale University, INRIA Paris and Yale University

  • Shyam Shankar

    Yale Univ, Applied Physics, Yale University, Department of Applied Physics, Yale University

  • Ioan-Mihai Pop

    Karlsruhe Institute of Technology, Physikalisches Institut, Karlsruhe Institute of Technology, Physics, Karlsruhe Institute of Technology, Physikalisches Institut, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany

  • Michel H. Devoret

    Yale Univ, Applied Physics, Yale University, Department of Applied Physics, Yale University, Department of Applied Physics, Yale University, New Haven, Connecticut 06511, USA