On "Consistent Quantization of Nearly Singular Superconducting Circuits"

Abstract

The analysis conducted by Rymarz and DiVincenzo (Phys. Rev. X 13, 021017 (2023)) regarding quantization of superconducting circuits is insufficient to justify their general conclusions, most importantly the need to discard Kirchhoff's laws to effect variable reductions. Amongst a variety of reasons, one source of several disagreements with experimental and theoretical results is the long-standing dispute between extended vs compact variables in the presence of Josephson junctions.

16 pages. 5 figures. Comments are most welcome. Typo corrected. Updated Fig. 5 and corrected related text imprecisions

References in corpus (17)

• Charge insensitive qubit design derived from the Cooper pair box
• Fluxonium: single Cooper pair circuit free of charge offsets
• Charging effects in the inductively shunted Josephson junction
• Superconducting circuit protected by two-Cooper-pair tunneling
• Protected Josephson Rhombi Chains
• Observation of Josephson Harmonics in Tunnel Junctions
• Inductively shunted transmon qubit with tunable transverse and longitudinal coupling
• Absence of a dissipative quantum phase transition in Josephson junctions
• Tunable inductive coupling of superconducting qubits in the strongly nonlinear regime
• Consistent Quantization of Nearly Singular Superconducting Circuits
• Calorimetry of a Quantum Phase Slip
• Hamiltonian Extrema of an Arbitrary Flux-Biased Josephson Circuit
• Geometrical description and Faddeev-Jackiw quantization of electrical networks
• Building a bigger Hilbert space for superconducting devices, one Bloch state at a time
• Lecture Notes on Quantum Electrical Circuits
• Quantum rotator and Josephson junction: compact vs. extended phase and dissipative quantum phase transition
• Indistinguishability of quantum states and rotation counting