Implementation of scalable suspended superinductors

• URL: http://arxiv.org/abs/2411.10396v1
• Date: Fri, 15 Nov 2024 18:02:48 GMT
• Title: Implementation of scalable suspended superinductors
• Authors: Christian Jünger, Trevor Chistolini, Long B. Nguyen, Hyunseong Kim, Larry Chen, Thomas Ersevim, William Livingston, Gerwin Koolstra, David I. Santiago, Irfan Siddiqi,
• Abstract summary: We present a framework for constructing superconducting circuits with suspended superinductors. We characterize both resonators and qubits with suspended arrays of Josephson junctions. This process is broadly compatible with other types of superinductors and circuit designs.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Superinductors have become a crucial component in the superconducting circuit toolbox, playing a key role in the development of more robust qubits. Enhancing the performance of these devices can be achieved by suspending the superinductors from the substrate, thereby reducing stray capacitance. Here, we present a fabrication framework for constructing superconducting circuits with suspended superinductors in planar architectures. To validate the effectiveness of this process, we systematically characterize both resonators and qubits with suspended arrays of Josephson junctions, ultimately confirming the high quality of the superinductive elements. In addition, this process is broadly compatible with other types of superinductors and circuit designs. Our results not only pave the way for scalable novel superconducting architectures but also provide the primitive for future investigation of loss mechanisms associated with the device substrate.

Related papers

• Flux-Activated Resonant Control of a Bosonic Quantum Memory [63.35373457838474]
  Bosonic circuit quantum electrodynamics (cQED) coherently control long-lived superconducting cavities.<n>We integrate an on-chip flux-control architecture with a long-lived bosonic memory housed in a 3D superconducting cavity.<n>We realize efficient arbitrary rotations between any pair of Fock levels in the memory.
  arXiv  Detail & Related papers  (2026-02-20T10:22:53Z)
• Liquid metal printing for superconducting circuits [30.755867253334163]
  Liquid-metal based micro-pipette printing is suited for fabricating superconducting lumped-element resonators.<n>Our results open up new avenues in the hardware implementation of scaled-up superconducting quantum computers.
  arXiv  Detail & Related papers  (2025-11-12T20:06:08Z)
• A superinductor in a deep sub-micron integrated circuit [0.0]
  Superinductors are circuit elements characterised by an intrinsic impedance in excess of the superconducting resistance quantum.<n>We present a superinductor realised within a silicon integrated circuit (IC)<n>By interfacing the superinductor to a silicon quantum dot formed within the same IC, we demonstrate a radio-frequency single-electron transistor (rfSET)
  arXiv  Detail & Related papers  (2025-07-17T15:12:43Z)
• Universal scaling of microwave dissipation in superconducting circuits [0.0]
  Superconductors consistently exhibit residual energy dissipation when driven by microwave currents, limiting coherence times.<n>We report a universal scaling between microwave dissipation and the superfluid density, a bulk property of superconductors related to charge carrier density and disorder.<n>Our findings define a fundamental limit to coherence set by intrinsic material properties and provide a predictive framework for selecting materials and the design of next-generation superconducting quantum circuits.
  arXiv  Detail & Related papers  (2025-07-11T18:27:11Z)
• Improving the accuracy of circuit quantization using the electromagnetic properties of superconductors [2.8635469418155406]
  We propose an improved method for quantizing superconducting circuits. We experimentally verify our method using planar superconducting quantum devices made of 35 nm-thick disordered niobium films. Our method enables systematic studies of superconducting devices based on disordered thin films or compact, fine-pitched elements.
  arXiv  Detail & Related papers  (2024-10-31T15:06:12Z)
• Hybrid optomechanical superconducting qubit system [0.0]
  We propose an integrated nonlinear superconducting device based on a nanoelectromechanical shuttle. The proposed setup represents an important step towards the implementation of bosonic error correction with mechanical elements in large-scale superconducting circuits.
  arXiv  Detail & Related papers  (2024-02-28T13:23:02Z)
• Exploration of superconducting multi-mode cavity architectures for quantum computing [44.99833362998488]
  Superconducting radio-frequency (SRF) cavities coupled to transmon circuits have proven to be a promising platform for building high-coherence quantum information processors. This paper presents the design optimization process of a multi-cell SRF cavity to perform quantum computation.
  arXiv  Detail & Related papers  (2023-08-22T19:02:23Z)
• Characterization of superconducting through-silicon vias as capacitive elements in quantum circuits [40.96261204117952]
  Large physical size of superconducting qubits and their associated on-chip control structures presents a practical challenge towards building a large-scale quantum computer. Here we use compact superconducting through-silicon vias to realize lumped element capacitors in both qubits and readout resonators. We show that TSVs are of sufficient quality to be used as capacitive circuit elements and provide a significant reductions in size over existing approaches.
  arXiv  Detail & Related papers  (2023-08-01T20:49:30Z)
• Nonreciprocal devices based on voltage-tunable junctions [48.7576911714538]
  We propose to couple the flux degree of freedom of one mode with the charge degree of freedom of a second mode in a hybrid superconducting-semiconducting architecture. Nonreciprocity can arise in this architecture in the presence of external static magnetic fields alone.
  arXiv  Detail & Related papers  (2022-09-13T17:49:19Z)
• Qubit-compatible substrates with superconducting through-silicon vias [0.0]
  We characterize superconducting vias and electrodes suitable for superconducting quantum processors. We measure internal quality factors of a million for test resonators excited at single-photon levels. Via stitching of ground planes is an important enabling technology for increasing the physical size of quantum processor chips.
  arXiv  Detail & Related papers  (2022-01-25T16:13:18Z)
• Ultrahigh-inductance materials from spinodal decomposition [30.5681951791708]
  Disordered superconducting nitrides with kinetic inductance have long been considered a leading material candidate for high-inductance quantum-circuit applications. We propose a method to drastically increase the kinetic inductance of superconducting materials via spinodal decomposition while keeping a low microwave loss. For the first time demonstrate the utilization of spinodal decomposition to trigger the insulator-to-superconductor transition with a drastically enhanced material disorder.
  arXiv  Detail & Related papers  (2021-11-09T12:42:09Z)
• TOF-SIMS Analysis of Decoherence Sources in Nb Superconducting Resonators [48.7576911714538]
  Superconducting qubits have emerged as a potentially foundational platform technology. Material quality and interfacial structures continue to curb device performance. Two-level system defects in the thin film and adjacent regions introduce noise and dissipate electromagnetic energy.
  arXiv  Detail & Related papers  (2021-08-30T22:22:47Z)
• Superconducting coupler with exponentially large on-off ratio [68.8204255655161]
  Tunable two-qubit couplers offer an avenue to mitigate errors in multiqubit superconducting quantum processors. Most couplers operate in a narrow frequency band and target specific couplings, such as the spurious $ZZ$ interaction. We introduce a superconducting coupler that alleviates these limitations by suppressing all two-qubit interactions with an exponentially large on-off ratio.
  arXiv  Detail & Related papers  (2021-07-21T03:03:13Z)
• Coherent superconducting qubits from a subtractive junction fabrication process [48.7576911714538]
  Josephson tunnel junctions are the centerpiece of almost any superconducting electronic circuit, including qubits. In recent years, sub-micron scale overlap junctions have started to attract attention. This work paves the way towards a more standardized process flow with advanced materials and growth processes, and constitutes an important step for large scale fabrication of superconducting quantum circuits.
  arXiv  Detail & Related papers  (2020-06-30T14:52:14Z)
• Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
  We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control. We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap. The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
  arXiv  Detail & Related papers  (2020-06-05T09:27:53Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.