• Corpus ID: 251402798

Experimental verification of the treatment of time-dependent flux in circuit quantization

@inproceedings{Bryon2022ExperimentalVO,
  title={Experimental verification of the treatment of time-dependent flux in circuit quantization},
  author={Jacob Bryon and Daniel Weiss and Xinyuan You and Sara Sussman and Xanthe Croot and Ziwen Huang and Jens Koch and Andrew A. Houck},
  year={2022}
}

• J. Bryon, D. Weiss, +5 authors A. Houck
• Published 7 August 2022
• Physics

Recent theoretical work has highlighted that quantizing a superconducting circuit in the presence of time-dependent flux Φ( t ) generally produces Hamiltonian terms proportional to d Φ /dt unless a special allocation of the flux across inductive terms is chosen. Here, we present an experiment probing the effects of a fast flux ramp applied to a heavy-fluxonium circuit. The experiment confirms that na¨ıve omission of the d Φ /dt term leads to theoretical predictions inconsistent with experimental data. Experimental data are fully consistent with recent theory that includes the derivative term or equivalently uses “irrotational variables” that uniquely allocate the flux to properly eliminate the d Φ /dt term.