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REVIEW 3 major objections 4 minor 44 references

A chain of 800 planar Al/InAs Josephson junctions behaves as a superinductor, with wave impedance above the resistance quantum and linear dispersion up to 12 GHz.

Reviewed by Pith at T0; open to challenge. T0 means a machine referee read the full paper against a public rubric. the ladder, T0–T4 →

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2026-08-03 10:25 UTC pith:AW2EQU3Z

load-bearing objection Solid first microwave characterization of Al/InAs junction chains as superinductors; the Z>R_Q claim holds, but the 'vanishing C_J' assertion is assumed rather than bounded. the 3 major comments →

arxiv 2601.10023 v1 pith:AW2EQU3Z submitted 2026-01-15 cond-mat.mes-hall quant-ph

Hybrid superinductance with Al/InAs

Junseok Oh , Ido Levy , Tyler Cowan , Jacob Issokson , Archana Kamal , Javad Shabani , Andrew P. Higginbotham This is my paper
classification cond-mat.mes-hall quant-ph
keywords superinductanceJosephson junction arraysAl/InAs heterostructuresplanar junctionsmicrowave spectroscopyfluxoniumshunt capacitancediffusive junctions
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

Superinductors are the load-bearing element of high-impedance qubits like fluxonium, but conventional junction chains fight a tradeoff: small charging energy (needed to avoid phase slips) drags down the plasma frequency. This paper reports that chains of 800 planar Al/InAs Josephson junctions sidestep that tradeoff. Because the planar junctions have vanishingly small shunt capacitance, the single-junction plasma frequency is immeasurably large, so the chain's mode dispersion stays linear up to 12 GHz while its characteristic impedance reaches 4.7–5.2 kΩ, well above the resistance quantum R_Q ≈ 1.027 kΩ. The loss is frequency-dependent and well described by a resistive shunt across each junction; the authors argue it may be intrinsic to the diffusive long junctions and propose mitigation strategies. If the loss can be reduced, hybrid superinductors would become practical for fluxonium qubits and readout of spin and parity qubits.

Core claim

The paper's central claim is that the planar geometry of Al/InAs Josephson junctions removes the usual superinductance barrier. In conventional Al/AlOx chains, the junction's shunt capacitance C_J dominates the dispersion and sets a plasma-frequency ceiling; here finite-element simulations reproduce the measured mode spacing of all devices without any added C_J, consistent with C_J being vanishingly small for planar junctions. As a result, the nominal criterion for superinductance, N > sqrt(C_J/C_0), no longer applies: one only needs the array self-resonances to lie outside the band of interest. Devices with 700 nm junctions reach characteristic impedances of 4.7 and 5.2 kΩ with linear dispe

What carries the argument

The central object is an 800-junction planar Al/InAs Josephson junction chain treated as an LC ladder: each cell contributes Josephson inductance L_J, a negligibly small shunt capacitance C_J, and a parasitic capacitance C_0 to ground. The argument is carried by two pieces: (i) finite-element electromagnetic simulation of a periodic sheet inductance reproduces the measured mode dispersion with no additional C_J, implying an immeasurably large single-junction plasma frequency; and (ii) a resistively-shunted-junction model in which each junction has an effective parallel resistance R_J. In the weak-shunt limit (R_J > ω L_J), the shunt transforms into a series resistance R*_J ≈ ω² L_J² / R_J, w

Load-bearing premise

The central claim rests on the assumption that the observed dispersion is fully captured by an LC ladder with negligible single-junction shunt capacitance C_J; if C_J is actually non-negligible, the fitted inductance and impedance would be wrong and the linear dispersion could mask plasma-frequency curvature.

What would settle it

Measure the same chains at frequencies above 12 GHz (or in a geometry with larger per-cell capacitance) and look for the onset of dispersion curvature; alternatively, fabricate a single planar junction in a resonator and directly extract C_J. If C_J is comparable to the ~80 aF parasitic capacitance C_0, the model and the derived Z > R_Q would collapse.

Watch this falsifier. Get emailed when new claim-graph text bears on it.

If this is right

  • Hybrid superinductance breaks the E_C/E_J tradeoff: planar junctions can have E_C > E_J and still behave as ideal superinductors because their plasma frequency is immeasurably high.
  • The superinductance criterion changes from N > sqrt(C_J/C_0) to simply keeping array self-resonances out of the operating band, simplifying design.
  • At current quality levels, the devices are promising for spin-qubit and parity-qubit readout below 1 GHz, where they could outperform coil inductors via higher Q, lower capacitance, and compact footprint.
  • Shortening junctions raises Q_i (3 kΩ vs 10 kΩ shunt), so shorter junctions or gated geometries with maintained inductance are a concrete route to lower loss.
  • Reproducibility across two 700 nm devices (4.7 and 5.2 kΩ) indicates the dispersion and inductance are well-controlled by geometry.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • If C_J is truly negligible, one could push Z even higher by decreasing C_0 (e.g., suspending the chain or reducing mesa width) or increasing L_J per cell, with the loss channel becoming the only ceiling; this is a testable design prediction.
  • The diffusive-junction loss hypothesis implies a specific scaling: Q_i should track the Thouless energy E_Th, so varying junction length and measuring Q_i would directly test whether the shunt is intrinsic.
  • The 1/f loss spectrum is reminiscent of quasiparticle or vortex motion; comparing Q_i below and above the superconducting gap, or under magnetic field, would distinguish the proposed resistive shunt from alternative loss mechanisms.
  • Because the chain is a low-loss, high-impedance transmission line to 12 GHz, it may serve as a broadband impedance transformer or coupling element for quantum circuits, not only as a lumped superinductor.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit.

Referee Report

3 major / 4 minor

Summary. The manuscript reports microwave spectroscopy of chains of 800 planar Al/InAs Josephson junctions. Three devices are measured (two with 700 nm junction length, one with 400 nm). Mode frequencies are extracted via one- and two-tone spectroscopy and fitted to finite-element EM simulations in which junctions are represented as regions of large sheet inductance; the fits yield per-cell Josephson inductance L_J, parasitic capacitance C0, and characteristic impedance Z ≈ 4.7 kΩ (Device 1), 5.17 kΩ (Device 2), and 1.07 kΩ (Device 3), all exceeding R_Q. Internal quality factors decrease roughly as 1/frequency, which the authors model with a resistively shunted junction, extracting R_J ≈ 10 kΩ, 11 kΩ, and 3 kΩ. The central claim is that hybrid Al/InAs chains exhibit superinductance without measurable single-junction plasma-frequency limitation up to 12 GHz, attributed to the planar geometry and 'vanishingly small' junction capacitance C_J.

Significance. If correct, the result demonstrates a practical hybrid superinductor with a much larger plasma frequency than conventional Al/AlOx chains, directly relevant to high-impedance superconducting circuits such as fluxonium qubits and low-frequency readout. The paper is transparent about the loss mechanism not being conclusively determined and about the modest current quality factors. Strengths include: three devices with different junction lengths, explicit finite-element simulations, a simple analytical loss model that captures the observed 1/f behavior, and acknowledgment of the device-to-device variation. The principal weakness is that the 'no plasma-frequency limitation' claim rests on an assumed zero junction capacitance C_J rather than on a fit or bound derived from the data, which is a load-bearing step for the abstract's strongest statement.

major comments (3)
  1. [Section II (after Fig. 3)] The claim that C_J is 'vanishingly small for planar junction' is not supported by the reported fitting procedure. The finite-element simulation represents junctions only as regions of large sheet inductance, with no C_J term. Agreement between this zero-C_J model and the measured mode frequencies cannot establish C_J ≈ 0 unless the measured band is demonstrably sensitive to C_J. For a planar junction with plasma frequency f_p ≳ 25 GHz, the curvature introduced into the mode frequencies scales as (f/f_p)^2 and amounts to only a few percent at 12 GHz, comparable to the environmental curvature in Fig. 2(f). The authors should either include C_J as a free parameter in the lumped/EM fit and report its fitted value and uncertainty, or provide a sensitivity analysis that places an upper bound on C_J from the data. Without this, the extracted L_J and Z are conditional on C_J=0, and the conclusio
  2. [Section II, Fig. 3 (Device 3)] The authors attribute the larger deviation of Device 3 from the EM simulation to a 'cooldown-specific microwave problem' but still use Device 3's fitted L_J and Z to extract R_J and to argue that shorter junctions have lower loss. This is a circularity: if the dispersion is corrupted by a cooldown issue, the extracted circuit parameters inherit that corruption, and the subsequent loss-model fit is not independent. The authors should either exclude Device 3 from the quantitative comparisons until the cooldown problem is understood, or provide a specific mechanism for the cooldown issue and demonstrate that it does not bias the fitted L_J, Z, and R_J values.
  3. [Section II, Eq. (3) and Fig. 4(a)] The loss-model fit extracts R_J using L_J and Z from the dispersion fit, but no uncertainties are reported for R_J, and the model's uniqueness is not tested. With only up to eight modes per device and one low-frequency point excluded for Device 3, the claim that Q_i ∝ 1/f_r is 'as observed' needs a quantitative goodness-of-fit or a comparison with alternative loss mechanisms (e.g., a residual plot or another scaling law). The text dismisses dielectric loss without showing its expected scaling; a brief quantitative comparison would substantially strengthen the phenomenological interpretation and the subsequent microscopic discussion.
minor comments (4)
  1. [Section II, Fig. 2(e-f) and text] The phrase 'speed of light in the chain (mode spacing Δf ≈ f_4 − f_3 ≈ 1.5 GHz)' is misleading: mode spacing is a frequency, not a speed. Rephrase to avoid the implication that a velocity is directly measured.
  2. [Section II, after Fig. 4(c)] The symbols I_c and R_N in 'the junction I_c R_N product' are not defined in the text. Define them at first use for readability.
  3. [Section II, Fig. 4(a)] For Device 3, the text says the lowest-frequency point is excluded from the fit because Q_c approaches Q_i. State explicitly how many points remain in each fit and whether the reported R_J values are stable under including/excluding that point.
  4. [General] The sentence 'This is consistent with the fact that the C_J is vanishingly small for planar junction' (after Fig. 3) is a logical non-sequitur in its present form; even if in the main text the issue is the absence of sensitivity, it should be reworded to avoid a claim that is not actually tested.

Circularity Check

0 steps flagged

No significant circularity: superinductance and loss claims are extracted from measured dispersion and independent EM simulation, not from self-referential fits.

full rationale

The central superinductance claim is obtained by fitting a single junction inductance L_J to measured mode frequencies in an EM model that treats junctions as regions of sheet inductance, then computing the chain impedance from L_J and the measured mode spacing; this is standard parameter extraction against an external numerical model, not a prediction that reduces to its own input. The slight curvature in mode spacing is attributed to the electromagnetic environment and end capacitances, and the comparison between periodic and uniform inductance gives the L_J fit nontrivial content. The loss model derives Qi = (Z R_J)/(2N omega0 L_J^2 f_r) from a resistively shunted junction circuit; the observed 1/f dependence is a functional consequence of the model rather than an input, and R_J is the only fitted parameter, so the model is not equivalent to the data by construction. The assertion that C_J is vanishingly small is an assumption that is not fitted or bounded; it is a sensitivity/correctness concern, not a circular reduction, because no equation or fitted parameter is defined in terms of the target conclusion. Self-citations (refs. 22, 26, 42, 43) share authors with this work but are used for motivation, context, and device comparison, and are not load-bearing for the dispersion or loss derivations. No uniqueness theorem or ansatz is imported from prior work to force the result. Therefore no significant circularity is present.

Axiom & Free-Parameter Ledger

3 free parameters · 5 axioms · 0 invented entities

The load-bearing new science is an experimental geometry, not a parameter-free derivation. The key numbers Z, C0, and R_J are all obtained by fitting simulated or analytical models to measured spectra; the paper is transparent about this, but the central claims inherit the fit.

free parameters (3)
  • L_J (per-unit-cell Josephson inductance) = 1.8 nH (Device 1), 2.14 nH (Device 2), 0.11 nH (Device 3)
    Chosen so that the finite-element simulation reproduces the measured mode frequencies (Fig. 2e-f, Fig. 3). Z and C0 are derived from it; not independently measured.
  • C0 (parasitic capacitance to ground per cell) = ≈80 aF
    Inferred from the same dispersion fit; per-cell shunt capacitance is not directly measured. The impedance Z is computed from L_J and C0.
  • R_J (shunt resistance per junction) = 10 kΩ (Device 1), 11 kΩ (Device 2), 3 kΩ (Device 3)
    Fit of Eq. 3 to the Qi vs frequency data for each device; normalizes the 1/f loss model. Device 3's lowest-frequency point excluded from fit.
axioms (5)
  • domain assumption Josephson-junction chain acts as an LC ladder with per-cell L_J, C_J, and C0 to ground (Fig. 1b).
    Used throughout Section II to interpret measured modes.
  • domain assumption Planar Al/InAs junctions have negligible shunt capacitance C_J.
    State that simulations match dispersion 'without any additional junction shunting capacitance' (Section II). This is an inference, not a direct capacitance measurement.
  • domain assumption The chain can be treated as a lossy transmission line (Eq. 2) in the weak-shunt limit R_J > ω L_J.
    Used to convert the parallel circuit to series R*, L* and derive Qi = 1/f. The limit is stated as 'relevant here' but not independently checked per mode.
  • domain assumption Long-junction limit l_J > ξ with ξ ≈ 200 nm; I_c R_N set by Thouless energy E_Th ~ 1/l_J^2.
    Used in the concluding loss discussion to argue that diffusive long junctions explain low Qi; drawn from prior ref. 26 and not independently verified in this paper.
  • domain assumption Coupling capacitors at the chain ends and the electromagnetic environment generate the slight mode-spacing curvature.
    Used to distinguish geometric dispersion from plasma-frequency dispersion (Section II, Fig. 2f).

pith-pipeline@v1.3.0-alltime-deepseek · 11151 in / 14867 out tokens · 148843 ms · 2026-08-03T10:25:19.118598+00:00 · methodology

0 comments
read the original abstract

We report microwave spectroscopy of Josephson junctions chains made from an epitaxial Al/InAs heterostructure. The chains exhibit superinductance, with characteristic wave impedance exceeding $R_{Q} = \hbar/(2e)^{2}$. The planar nature of the junctions results in a large plasma frequency, with no measurable deviations from ideal dispersion up to $12~\mathrm{GHz}$. Internal quality factors decrease sharply with frequency, which we describe with a simple loss model. The possibility of a loss mechanism intrinsic to the superconductor-semiconductor junction is considered.

Figures

Figures reproduced from arXiv: 2601.10023 by Andrew P. Higginbotham, Archana Kamal, Ido Levy, Jacob Issokson, Javad Shabani, Junseok Oh, Tyler Cowan.

Figure 2
Figure 2. Figure 2: FIG. 2. (a-d) Mode 1 - 4 of Device 1 measured through two-tone [PITH_FULL_IMAGE:figures/full_fig_p002_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3. (a) The mode frequencies and (b) the mode spacing for all [PITH_FULL_IMAGE:figures/full_fig_p003_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: FIG. 4. (a) [PITH_FULL_IMAGE:figures/full_fig_p003_4.png] view at source ↗

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Reference graph

Works this paper leans on

44 extracted references · 11 canonical work pages

  1. [1]

    Blais , author A

    author author A. Blais , author A. L. \ Grimsmo , author S. M. \ Girvin , \ and\ author A. Wallraff ,\ title title Circuit quantum electrodynamics , \ 10.1103/RevModPhys.93.025005 journal journal Rev. Mod. Phys. \ volume 93 ,\ pages 025005 ( year 2021 ) NoStop

    doi:10.1103/revmodphys.93.025005 2021

  2. [2]

    author author V. E. \ Manucharyan , author J. Koch , author L. I. \ Glazman , \ and\ author M. H. \ Devoret ,\ title title Fluxonium: Single cooper-pair circuit free of charge offsets , \ @noop journal journal Science \ volume 326 ,\ pages 113--116 ( year 2009 ) NoStop

    2009

  3. [3]

    author author L. B. \ Nguyen , author Y.-H. \ Lin , author A. Somoroff , author R. Mencia , author N. Grabon , \ and\ author V. E. \ Manucharyan ,\ title title High-coherence fluxonium qubit , \ @noop journal journal Physical Review X \ volume 9 ,\ pages 041041 ( year 2019 ) NoStop

    2019

  4. [4]

    Bao , author H

    author author F. Bao , author H. Deng , author D. Ding , author R. Gao , author X. Gao , author C. Huang , author X. Jiang , author H.-S. \ Ku , author Z. Li , author X. Ma , et al. ,\ title title Fluxonium: An alternative qubit platform for high-fidelity operations , \ @noop journal journal Physical review letters \ volume 129 ,\ pages 010502 ( year 2022...

    2022

  5. [5]

    Ding , author M

    author author L. Ding , author M. Hays , author Y. Sung , author B. Kannan , author J. An , author A. Di Paolo , author A. H. \ Karamlou , author T. M. \ Hazard , author K. Azar , author D. K. \ Kim , et al. ,\ title title High-fidelity, frequency-flexible two-qubit fluxonium gates with a transmon coupler , \ @noop journal journal Physical Review X \ volu...

    2023

  6. [6]

    Gyenis , author P

    author author A. Gyenis , author P. S. \ Mundada , author A. Di Paolo , author T. M. \ Hazard , author X. You , author D. I. \ Schuster , author J. Koch , author A. Blais , \ and\ author A. A. \ Houck ,\ title title Experimental realization of a protected superconducting circuit derived from the 0-- qubit , \ @noop journal journal PRX Quantum \ volume 2 ,...

    2021

  7. [7]

    Ardati , author S

    author author W. Ardati , author S. L \'e ger , author S. Kumar , author V. N. \ Suresh , author D. Nicolas , author C. Mori , author F. D’Esposito , author T. Vakhtel , author O. Buisson , author Q. Ficheux , et al. ,\ title title Using bifluxon tunneling to protect the fluxonium qubit , \ @noop journal journal Physical Review X \ volume 14 ,\ pages 0410...

    2024

  8. [8]

    author author R. A. \ Mencia , author W.-J. \ Lin , author H. Cho , author M. G. \ Vavilov , \ and\ author V. E. \ Manucharyan ,\ title title Integer fluxonium qubit , \ @noop journal journal PRX Quantum \ volume 5 ,\ pages 040318 ( year 2024 ) NoStop

    2024

  9. [9]

    author author N. A. \ Masluk , author I. M. \ Pop , author A. Kamal , author Z. K. \ Minev , \ and\ author M. H. \ Devoret ,\ title title Microwave characterization of josephson junction arrays: Implementing a low loss superinductance , \ 10.1103/PhysRevLett.109.137002 journal journal Phys. Rev. Lett. \ volume 109 ,\ pages 137002 ( year 2012 ) NoStop

    work page doi:10.1103/physrevlett.109.137002 2012

  10. [10]

    Maleeva , author L

    author author N. Maleeva , author L. Gr \"u nhaupt , author T. Klein , author F. Levy-Bertrand , author O. Dupre , author M. Calvo , author F. Valenti , author P. Winkel , author F. Friedrich , author W. Wernsdorfer , author A. V. \ Ustinov , author H. Rotzinger , author A. Monfardini , author M. V. \ Fistul , \ and\ author I. M. \ Pop ,\ title title Circ...

    work page doi:10.1038/s41467-018-06386-9 2018

  11. [11]

    Kuzmin , author R

    author author R. Kuzmin , author R. Mencia , author N. Grabon , author N. Mehta , author Y.-H. \ Lin , \ and\ author V. E. \ Manucharyan ,\ title title Quantum electrodynamics of a superconductor--insulator phase transition , \ @noop journal journal Nature Physics \ volume 15 ,\ pages 930--934 ( year 2019 ) NoStop

    2019

  12. [12]

    Mukhopadhyay , author J

    author author S. Mukhopadhyay , author J. Senior , author J. Saez-Mollejo , author D. Puglia , author M. Zemlicka , author J. M. \ Fink , \ and\ author A. P. \ Higginbotham ,\ title title Superconductivity from a melted insulator in josephson junction arrays , \ @noop journal journal Nature Physics \ volume 19 ,\ pages 1630--1635 ( year 2023 ) NoStop

    2023

  13. [13]

    Charpentier , author D

    author author T. Charpentier , author D. Perconte , author S. L \'e ger , author K. R. \ Amin , author F. Blondelle , author F. Gay , author O. Buisson , author L. Ioffe , author A. Khvalyuk , author I. Poboiko , et al. ,\ title title First-order quantum breakdown of superconductivity in an amorphous superconductor , \ @noop journal journal Nature Physics...

    2025

  14. [14]

    Charpentier , author A

    author author T. Charpentier , author A. Khvalyuk , author L. Ioffe , author M. Feigel'Man , author N. Roch , \ and\ author B. Sac \'e p \'e ,\ title title Universal scaling of microwave dissipation in superconducting circuits , \ @noop journal journal arXiv preprint arXiv:2507.08953 \ ( year 2025 b ) NoStop

    Pith/arXiv arXiv 2025

  15. [15]

    author author T. W. \ Larsen , author K. D. \ Petersson , author F. Kuemmeth , author T. S. \ Jespersen , author P. Krogstrup , author J. Nyg rd , \ and\ author C. M. \ Marcus ,\ title title Semiconductor-nanowire-based superconducting qubit , \ @noop journal journal Physical review letters \ volume 115 ,\ pages 127001 ( year 2015 ) NoStop

    2015

  16. [16]

    Luthi , author T

    author author F. Luthi , author T. Stavenga , author O. Enzing , author A. Bruno , author C. Dickel , author N. Langford , author M. A. \ Rol , author T. S. \ Jespersen , author J. Nyg rd , author P. Krogstrup , et al. ,\ title title Evolution of nanowire transmon qubits and their coherence in a magnetic field , \ @noop journal journal Physical review let...

    2018

  17. [17]

    Casparis , author M

    author author L. Casparis , author M. R. \ Connolly , author M. Kjaergaard , author N. J. \ Pearson , author A. Kringh j , author T. W. \ Larsen , author F. Kuemmeth , author T. Wang , author C. Thomas , author S. Gronin , et al. ,\ title title Superconducting gatemon qubit based on a proximitized two-dimensional electron gas , \ @noop journal journal Nat...

    2018

  18. [18]

    Hays , author G

    author author M. Hays , author G. de Lange , author K. Serniak , author D. J. \ van Woerkom , author D. Bouman , author P. Krogstrup , author J. Nyg rd , author A. Geresdi , \ and\ author M. H. \ Devoret ,\ title title Direct microwave measurement of andreev-bound-state dynamics in a semiconductor-nanowire josephson junction , \ 10.1103/PhysRevLett.121.04...

    work page doi:10.1103/physrevlett.121.047001 2018

  19. [19]

    Tosi , author C

    author author L. Tosi , author C. Metzger , author M. F. \ Goffman , author C. Urbina , author H. Pothier , author S. Park , author A. L. \ Yeyati , author J. Nyg rd , \ and\ author P. Krogstrup ,\ title title Spin-orbit splitting of andreev states revealed by microwave spectroscopy , \ 10.1103/PhysRevX.9.011010 journal journal Phys. Rev. X \ volume 9 ,\ ...

    work page doi:10.1103/physrevx.9.011010 2019

  20. [20]

    Phan , author P

    author author D. Phan , author P. Falthansl-Scheinecker , author U. Mishra , author W. Strickland , author D. Langone , author J. Shabani , \ and\ author A. Higginbotham ,\ title title Gate-tunable superconductor-semiconductor parametric amplifier , \ 10.1103/PhysRevApplied.19.064032 journal journal Phys. Rev. Appl. \ volume 19 ,\ pages 064032 ( year 2023...

    work page doi:10.1103/physrevapplied.19.064032 2023

  21. [21]

    Hao , author T

    author author Z. Hao , author T. Shaw , author M. Hatefipour , author W. Strickland , author B. Elfeky , author D. Langone , author J. Shabani , \ and\ author S. Shankar ,\ title title Kerr nonlinearity and parametric amplification with an al-inas superconductor--semiconductor josephson junction , \ @noop journal journal Applied Physics Letters \ volume 1...

    2024

  22. [22]

    author author W. M. \ Strickland , author B. H. \ Elfeky , author L. Baker , author A. Maiani , author J. Lee , author I. Levy , author J. Issokson , author A. Vrajitoarea , \ and\ author J. Shabani ,\ title title Gatemonium: A voltage-tunable fluxonium , \ @noop journal journal PRX Quantum \ volume 6 ,\ pages 010326 ( year 2025 ) NoStop

    2025

  23. [23]

    Bargerbos , author W

    author author A. Bargerbos , author W. Uilhoorn , author C.-K. \ Yang , author P. Krogstrup , author L. P. \ Kouwenhoven , author G. de Lange , author B. van Heck , \ and\ author A. Kou ,\ title title Observation of vanishing charge dispersion of a nearly open superconducting island , \ 10.1103/PhysRevLett.124.246802 journal journal Phys. Rev. Lett. \ vol...

    work page doi:10.1103/physrevlett.124.246802 2020

  24. [24]

    Kringh j , author B

    author author A. Kringh j , author B. van Heck , author T. W. \ Larsen , author O. Erlandsson , author D. Sabonis , author P. Krogstrup , author L. Casparis , author K. D. \ Petersson , \ and\ author C. M. \ Marcus ,\ title title Suppressed charge dispersion via resonant tunneling in a single-channel transmon , \ 10.1103/PhysRevLett.124.246803 journal jou...

    work page doi:10.1103/physrevlett.124.246803 2020

  25. [25]

    Vanevi c \' c \ and\ author Y

    author author M. Vanevi c \' c \ and\ author Y. V. \ Nazarov ,\ title title Quantum phase slips in superconducting wires with weak inhomogeneities , \ 10.1103/PhysRevLett.108.187002 journal journal Phys. Rev. Lett. \ volume 108 ,\ pages 187002 ( year 2012 ) NoStop

    work page doi:10.1103/physrevlett.108.187002 2012

  26. [26]

    Mayer , author J

    author author W. Mayer , author J. Yuan , author K. S. \ Wickramasinghe , author T. Nguyen , author M. C. \ Dartiailh , \ and\ author J. Shabani ,\ title title Superconducting proximity effect in epitaxial al-inas heterostructures , \ @noop journal journal Applied Physics Letters \ volume 114 ( year 2019 ) NoStop

    2019

  27. [27]

    author author D. J. \ Reilly , author C. M. \ Marcus , author M. P. \ Hanson , \ and\ author A. C. \ Gossard ,\ title title Fast single-charge sensing with a rf quantum point contact , \ 10.1063/1.2794995 journal journal Applied Physics Letters \ volume 91 ,\ pages 162101 ( year 2007 ) NoStop

    work page doi:10.1063/1.2794995 2007

  28. [28]

    author author K. D. \ Petersson , author C. G. \ Smith , author D. Anderson , author P. Atkinson , author G. A. C. \ Jones , \ and\ author D. A. \ Ritchie ,\ title title Charge and spin state readout of a double quantum dot coupled to a resonator , \ 10.1021/nl100663w journal journal Nano Letters \ volume 10 ,\ pages 2789--2793 ( year 2010 ) NoStop

    work page doi:10.1021/nl100663w 2010

  29. [29]

    Crippa , author R

    author author A. Crippa , author R. Ezzouch , author A. Apr \'a , author A. Amisse , author R. Lavi \'e ville , author L. Hutin , author B. Bertrand , author M. Vinet , author M. Urdampilleta , author T. Meunier , author M. Sanquer , author X. Jehl , author R. Maurand , \ and\ author S. De Franceschi ,\ title title Gate-reflectometry dispersive readout an...

    doi:10.1038/s41467-019-10848-z 2019

  30. [30]

    author author S. K. \ Bartee , author W. Gilbert , author K. Zuo , author K. Das , author T. Tanttu , author C. H. \ Yang , author N. Dumoulin Stuyck , author S. J. \ Pauka , author R. Y. \ Su , author W. H. \ Lim , author S. Serrano , author C. C. \ Escott , author F. E. \ Hudson , author K. M. \ Itoh , author A. Laucht , author A. S. \ Dzurak , \ and\ a...

    doi:10.1038/s41586-025-09157-x 2025

  31. [31]

    Aghaee , author A

    author author M. Aghaee , author A. Alcaraz Ramirez , author Z. Alam , author R. Ali , author M. Andrzejczuk , author A. Antipov , author M. Astafev , author A. Barzegar , author B. Bauer , author J. Becker , author U. K. \ Bhaskar , author A. Bocharov , author S. Boddapati , author D. Bohn , author J. Bommer , author L. Bourdet , author A. Bousquet , aut...

    2025

  32. [32]

    van Loo , author F

    author author N. van Loo , author F. Zatelli , author G. O. \ Steffensen , author B. Roovers , author G. Wang , author T. V. \ Caekenberghe , author A. Bordin , author D. van Driel , author Y. Zhang , author W. D. \ Huisman , author G. Badawy , author E. P. A. M. \ Bakkers , author G. P. \ Mazur , author R. Aguado , \ and\ author L. P. \ Kouwenhoven ,\ 10...

    Pith/arXiv arXiv doi:10.48550/arxiv.2507.01606 2025

  33. [33]

    Aghaee , author Z

    author author M. Aghaee , author Z. Alam , author R. Andersen , author M. Andrzejczuk , author A. Antipov , author M. Astafev , author L. Avilovas , author A. Azizimanesh , author E. Banek , author B. Bauer , author J. Becker , author U. K. \ Bhaskar , author A. G. \ Boa , author S. Boddapati , author N. Bohac , author J. D. S. \ Bommer , author J. Borovs...

    Pith/arXiv arXiv 2025

  34. [34]

    author author J. M. \ Hornibrook , author J. I. \ Colless , author A. C. \ Mahoney , author X. G. \ Croot , author S. Blanvillain , author H. Lu , author A. C. \ Gossard , \ and\ author D. J. \ Reilly ,\ title title Frequency multiplexing for readout of spin qubits , \ 10.1063/1.4868107 journal journal Applied Physics Letters \ volume 104 ,\ pages 103108 ...

    work page doi:10.1063/1.4868107 2014

  35. [35]

    Probst , author F

    author author S. Probst , author F. Song , author P. A. \ Bushev , author A. V. \ Ustinov , \ and\ author M. Weides ,\ title title Efficient and robust analysis of complex scattering data under noise in microwave resonators , \ @noop journal journal Review of Scientific Instruments \ volume 86 ( year 2015 ) NoStop

    2015

  36. [36]

    Wei l , author B

    author author T. Wei l , author B. K \"u ng , author \'E . Dumur , author A. K. \ Feofanov , author I. Matei , author C. Naud , author O. Buisson , author F. W. \ Hekking , \ and\ author W. Guichard ,\ title title Kerr coefficients of plasma resonances in josephson junction chains , \ @noop journal journal Physical Review B \ volume 92 ,\ pages 104508 ( y...

    2015

  37. [37]

    Krupko , author V

    author author Y. Krupko , author V. Nguyen , author T. Wei l , author \'E . Dumur , author J. Puertas , author R. Dassonneville , author C. Naud , author F. Hekking , author D. Basko , author O. Buisson , et al. ,\ title title Kerr nonlinearity in a superconducting josephson metamaterial , \ @noop journal journal Physical Review B \ volume 98 ,\ pages 094...

    2018

  38. [38]

    Manset , author J

    author author P. Manset , author J. Palomo , author A. Schmitt , author K. Gerashchenko , author R. Rousseau , author H. Patange , author P. Abgrall , author E. Flurin , author S. Del \'e glise , author T. Jacqmin , et al. ,\ title title Hyperinductance based on stacked josephson junctions , \ @noop journal journal arXiv preprint arXiv:2505.02764 \ ( year...

    Pith/arXiv arXiv 2025

  39. [39]

    Gao ,\ title The Physics of Superconducting Microwave Resonators ,\ https://thesis.library.caltech.edu/ Ph.D

    author author J. Gao ,\ title The Physics of Superconducting Microwave Resonators ,\ https://thesis.library.caltech.edu/ Ph.D. thesis ,\ school California Institute of Technology , address Pasadena, California ( year 2008 ),\ note ph.D. thesis NoStop

    2008

  40. [40]

    Kaiser , author S

    author author C. Kaiser , author S. Skacel , author S. W \"u nsch , author R. Dolata , author B. Mackrodt , author A. Zorin , \ and\ author M. Siegel ,\ title title Measurement of dielectric losses in amorphous thin films at gigahertz frequencies usingsuperconducting resonators , \ @noop journal journal Superconductor Science and Technology \ volume 23 ,\...

    2010

  41. [41]

    author author D. M. \ Pozar ,\ @noop title Microwave engineering: theory and techniques \ ( publisher John wiley & sons ,\ year 2021 ) NoStop

    2021

  42. [42]

    Phan , author J

    author author D. Phan , author J. Senior , author A. Ghazaryan , author M. Hatefipour , author W. Strickland , author J. Shabani , author M. Serbyn , \ and\ author A. P. \ Higginbotham ,\ title title Detecting induced p ip pairing at the al-inas interface with a quantum microwave circuit , \ @noop journal journal Physical Review Letters \ volume 128 ,\ pa...

    2022

  43. [43]

    author author W. M. \ Strickland , author B. H. \ Elfeky , author J. O. \ Yuan , author W. F. \ Schiela , author P. Yu , author D. Langone , author M. G. \ Vavilov , author V. E. \ Manucharyan , \ and\ author J. Shabani ,\ title title Superconducting resonators with voltage-controlled frequency and nonlinearity , \ 10.1103/PhysRevApplied.19.034021 journal...

    doi:10.1103/physrevapplied.19.034021 2023

  44. [44]

    Telkamp , author T

    author author S. Telkamp , author T. Antonelli , author C. Todt , author M. Hinderling , author M. Coraiola , author D. Haxell , author S. C. t. \ Kate , author D. Sabonis , author P. Zeng , author R. Schott , et al. ,\ title title Development of a nb-based semiconductor-superconductor hybrid 2deg platform , \ @noop journal journal Advanced Electronic Mat...

    2025