Variational tight-binding method for simulating large superconducting circuits

D. K. Weiss*, Wade Degottardi, Jens Koch, D. G. Ferguson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We generalize solid-state tight-binding techniques for the spectral analysis of large superconducting circuits. We find that tight-binding states can be better suited for approximating the low-energy excitations than charge basis states, as illustrated for the interesting example of the current-mirror circuit. The use of tight binding can dramatically lower the Hilbert-space dimension required for convergence to the true spectrum, and allows for the accurate simulation of larger circuits that are out of reach of charge basis diagonalization.

Original languageEnglish (US)
Article number033244
JournalPhysical Review Research
Issue number3
StatePublished - Sep 2021

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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