High Impedance Granular Aluminum Ring Resonators

• URL: http://arxiv.org/abs/2506.07761v1
• Date: Mon, 09 Jun 2025 13:39:36 GMT
• Title: High Impedance Granular Aluminum Ring Resonators
• Authors: Mahya Khorramshahi, Martin Spiecker, Patrick Paluch, Simon Geisert, Nicolas Gosling, Nicolas Zapata, Lucas Brauch, Christian Kuebel, Simone Dehm, Ralph Krupke, Wolfgang Wernsdorfer, Ioan M. Pop, Thomas Reisinger,
• Abstract summary: Ring resonators made with grAl meandered superinductors exhibit quality factors on the order of $105$ in the single-photon regime.<n>In some devices, in the single-photon regime, we observe a positive Kerr coefficient of unknown origin.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Superconducting inductors with impedance surpassing the resistance quantum, i.e., superinductors, are important for quantum technologies because they enable the development of protected qubits, enhance coupling to systems with small electric dipole moments, and facilitate the study of phase-slip physics. We demonstrate superinductors with densely packed meandered traces of granular aluminum (grAl) with inductances up to $4\,\mu\mathrm{H}$, achieving impedances exceeding $100\,\mathrm{k}\Omega$ in the $4-8\,\mathrm{GHz}$ range. Ring resonators made with grAl meandered superinductors exhibit quality factors on the order of $10^5$ in the single-photon regime and low non-linearity on the order of tens of $\mathrm{Hz}$. Depending on the grAl resistivity, at $10\,\mathrm{Hz}$, we measure frequency noise spectral densities in the range of $10^2$ to $10^3\,\mathrm{Hz}/\sqrt{\mathrm{Hz}}$. In some devices, in the single-photon regime, we observe a positive Kerr coefficient of unknown origin. Using more complex fabrication, the devices could be released from the substrate, either freestanding or suspended on a membrane, thereby further improving their impedance by a factor of three.

Related papers

• Hyperinductance based on stacked Josephson junctions [0.0]
  Superinductances are key enablers for emerging quantum circuit architectures.<n>We present two fabrication techniques for realizing superinductances based on vertically stacked Josephson junctions.<n>Our results establish junction stacking as a scalable, robust, and flexible platform for next-generation quantum circuits.
  arXiv  Detail & Related papers  (2025-05-05T16:20:14Z)
• Low-characteristic-impedance superconducting tadpole resonators in the sub-gigahertz regime [0.9890132823939973]
  We demonstrate a simple and versatile resonator design based on a short strip of a typical coplanar waveguide shorted at one end to the ground and shunted at the other end with a large parallel-plate capacitor. We conclude that these tadpole resonators are well suited for applications requiring low frequency and low charactersitic impedance while maintaining a small footprint on chip.
  arXiv  Detail & Related papers  (2024-09-04T09:26:41Z)
• Cyclically operated Single Microwave Photon Counter with $10^\mathrm{-22}$ $\mathrm{W/\sqrt{Hz}}$ sensitivity [33.7054351451505]
  Single photon detection played an important role in the development of quantum optics. In recent years, significant progress has been made in developing single microwave photon detectors (SMPDs) based on superconducting quantum bits or bolometers. We present a practical SMPD based on the irreversible transfer of an incoming photon to the excited state of a transmon qubit by a four-wave mixing process.
  arXiv  Detail & Related papers  (2023-07-07T14:11:14Z)
• Continuous dynamical decoupling of optical $^{171}$Yb$^{+}$ qudits with radiofrequency fields [45.04975285107723]
  We experimentally achieve a gain in the efficiency of realizing quantum algorithms with qudits. Our results are a step towards the realization of qudit-based algorithms using trapped ions.
  arXiv  Detail & Related papers  (2023-05-10T11:52:12Z)
• Numerical analysis of a three-wave-mixing Josephson traveling-wave parametric amplifier with engineered dispersion loadings [62.997667081978825]
  Recently proposed Josephson traveling-wave parametric amplifier has great potential in achieving a gain of 20 dB and a flat bandwidth of at least 4 GHz. We model the advanced JTWPA circuit with periodic modulation of the circuit parameters. engineered dispersion loadings allow achieving sufficiently wide $3$ dB-bandwidth from $3$ GHz to $9$ GHz combined with a reasonably small ripple.
  arXiv  Detail & Related papers  (2022-09-22T14:46:04Z)
• Compact superconducting microwave resonators based on Al-AlOx-Al capacitor [56.00511651498414]
  resonators based on aluminum oxide -- aluminum ($mathrmAl/AlO_x/Al$) parallel-plate capacitors. The size of the resonators is only 0.04$mathrmmm2$, which is more than one order smaller than the typical size of coplanar resonators.
  arXiv  Detail & Related papers  (2022-03-17T20:11:53Z)
• Unimon qubit [42.83899285555746]
  Superconducting qubits are one of the most promising candidates to implement quantum computers. Here, we introduce and demonstrate a superconducting-qubit type, the unimon, which combines the desired properties of high non-linearity, full insensitivity to dc charge noise, insensitivity to flux noise, and a simple structure consisting only of a single Josephson junction in a resonator.
  arXiv  Detail & Related papers  (2022-03-11T12:57:43Z)
• Rapid generation of all-optical $^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance [58.720142291102135]
  We investigate the production of all-optical $39$K Bose-Einstein condensates with different scattering lengths using a Feshbach resonance near $33$ G. We are able to produce fully condensed ensembles with $5.8times104$ atoms within $850$ ms evaporation time at a scattering length of $232. Based on our findings we describe routes towards high-flux sources of ultra-cold potassium for inertial sensing.
  arXiv  Detail & Related papers  (2022-01-12T16:39:32Z)
• Surpassing the resistance quantum with a geometric superinductor [0.0]
  Superinductors have a characteristic impedance exceeding the resistance quantum $R_textQ approx 6.45textkOmega$ which leads to a suppression of ground state charge fluctuations. We present modeling, fabrication and characterization of 104 planar aluminum coil resonators with a characteristic impedance up to 30.9 $textkOmega$ at 5.6 GHz. Geometric superinductors are free of uncontrolled tunneling events and offer high, linearity and the ability to couple magnetically.
  arXiv  Detail & Related papers  (2020-07-03T12:22:44Z)
• Optimal coupling of HoW$_{10}$ molecular magnets to superconducting circuits near spin clock transitions [85.83811987257297]
  We study the coupling of pure and magnetically diluted crystals of HoW$_10$ magnetic clusters to microwave superconducting coplanar waveguides. Results show that engineering spin-clock states of molecular systems offers a promising strategy to combine sizeable spin-photon interactions with a sufficient isolation from unwanted magnetic noise sources.
  arXiv  Detail & Related papers  (2019-11-18T11:03:06Z)
• Implementation of a transmon qubit using superconducting granular aluminum [0.0]
  grAl may provide a robust source of non-linearity for strongly driven quantum circuits. In intrinsic qubit linewidth $gamma = 2 pi times 10,mathrmkHz$, corresponding to a lifetime of $16,mathrmmu s$. This linewidth remains below $2 pi times 150,mathrmkHz$ for in-plane magnetic fields up to $sim70,mathrmmT$.
  arXiv  Detail & Related papers  (2019-11-06T12:18:43Z)

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.