Improving magnetic-field resilience of NbTiN planar resonators using a hard-mask fabrication technique

• URL: http://arxiv.org/abs/2312.13703v1
• Date: Thu, 21 Dec 2023 10:11:52 GMT
• Title: Improving magnetic-field resilience of NbTiN planar resonators using a hard-mask fabrication technique
• Authors: Arne Bahr and Matteo Boselli and Benjamin Huard and Audrey Bienfait
• Abstract summary: Losses in microwave superconducting resonators can have several origins, including microscopic defects. We characterize the magnetic field response of NbTiN resonators patterned on sapphire and observe clear absorption lines occurring at specific magnetic fields.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: High-quality factor microwave resonators operating in a magnetic field are a necessity for some quantum sensing applications and hybrid platforms. Losses in microwave superconducting resonators can have several origins, including microscopic defects, usually known as two-level-systems (TLS). Here, we characterize the magnetic field response of NbTiN resonators patterned on sapphire and observe clear absorption lines occurring at specific magnetic fields. We identify the spin systems responsible for these features, including a yet unreported spin with $g=1.85$ that we attribute to defects in the NbTiN thin film. We develop mitigation strategies involving namely an aluminum etch mask, resulting in maintaining quality factors above $Q>2 \times 10^5$ in the range $0$-$0.3$ T.

Related papers

• Prospects for Ultralow-Mass Nuclear Magnetic Resonance using Spin Defects in Hexagonal Boron Nitride [0.0]
  We develop an alternative nanoscale NMR sensor using the negatively charged boron vacancy ($V_B-$) in hexagonal boron nitride (hBN) As a van der Waals material, hBN's surface is free from dangling bonds and other sources of paramagnetic noise that degrade the performance of near surface NVs. We propose measurement protocols for $V_B-$ NMR for both statistically and uniformly polarized samples at the nano- and micron-scales.
  arXiv  Detail & Related papers  (2025-05-01T08:19:55Z)
• Two-media laser threshold magnetometry: A magnetic-field-dependent laser threshold [31.114245664719455]
  Nitrogen-vacancy (NV) centers in diamond are a promising platform for high-precision magnetometry. Laser threshold magnetometry (LTM) exploits stimulated emission of NV centers by placing an NV-doped diamond inside an optical cavity.
  arXiv  Detail & Related papers  (2025-04-11T11:56:17Z)
• Study of Magnetic Field Resilient High Impedance High-Kinetic Inductance Superconducting Resonators [0.0]
  We compare superconducting resonators fabricated from niobium nitride (NbN) and granular aluminum (grAl) thin films. At zero magnetic field, resonators made from grAl exhibit higher $Q_i$ compared to their NbN counterparts. NbN offers superior magnetic-field resilience beneficial for hybrid circuit quantum electrodynamics applications.
  arXiv  Detail & Related papers  (2025-03-17T15:58:45Z)
• Magnetic field dependence of $V_B^-$ Defects in hexagonal boron nitride [5.426508182505848]
  We study the influence of off-axis magnetic fields on the coherence properties of $V_B-$ defects in hBN. Results are crucial for optimizing $V_B-$ defects in hBN, establishing their significance as robust quantum sensors.
  arXiv  Detail & Related papers  (2024-10-09T10:40:05Z)
• Magnetic Field Tolerant Superconducting Spiral Resonators for Circuit QED [0.0]
  We present spiral resonators of thin film niobium (Nb) that exhibit large geometric inductance, high critical magnetic fields and high single photon quality factors. These low geometric loss inductors can be a compelling alternative to kinetic inductors to create high-impedance superconducting devices.
  arXiv  Detail & Related papers  (2024-06-14T19:31:57Z)
• Revealing Emergent Magnetic Charge in an Antiferromagnet with Diamond Quantum Magnetometry [42.60602838972598]
  Whirling topological textures play a key role in exotic phases of magnetic materials and offer promise for logic and memory applications. In antiferromagnets, these textures exhibit enhanced stability and faster dynamics with respect to ferromagnetic counterparts. One technique that meets the demand of highly sensitive vectorial magnetic field sensing with negligible backaction is diamond quantum magnetometry.
  arXiv  Detail & Related papers  (2023-03-21T18:30:20Z)
• Evolution of $1/f$ Flux Noise in Superconducting Qubits with Weak Magnetic Fields [37.41181188499616]
  The origin of $1/f$ magnetic flux noise in superconducting circuits has remained an open question for several decades. Recent progress in superconducting devices for quantum information has highlighted the need to mitigate sources of qubit decoherence. We apply weak in-plane magnetic fields to a capacitively-shunted flux qubit and study the flux-noise-limited qubit dephasing.
  arXiv  Detail & Related papers  (2023-01-18T22:26:08Z)
• Magnetic-field-induced cavity protection for intersubband polaritons [52.77024349608834]
  We analyse the effect of a strong perpendicular magnetic field on an intersubband transition in a disordered doped quantum well strongly coupled to an optical cavity. The magnetic field changes the lineshape of the intersubband optical transition due to the roughness of the interface of the quantum well from a Lorentzian to a Gaussian one.
  arXiv  Detail & Related papers  (2022-10-14T18:00:03Z)
• A hybrid ferromagnetic transmon qubit: circuit design, feasibility and detection protocols for magnetic fluctuations [45.82374977939355]
  We show that the characteristic hysteretic behavior of the ferromagnetic barrier provides an alternative and intrinsically digital tuning of the qubit frequency by means of magnetic field pulses. The possibility to use the qubit as a noise detector and its relevance to investigate the subtle interplay of magnetism and superconductivity is envisaged.
  arXiv  Detail & Related papers  (2022-06-01T18:50:26Z)
• Dual-laser self-injection locking to an integrated microresonator [93.17495788476688]
  We experimentally demonstrate the dual-laser SIL of two multifrequency laser diodes to different modes of an integrated Si$_3$N$_4$ microresonator. Locking both lasers to the same mode results in a simultaneous frequency and phase stabilization and coherent addition of their outputs.
  arXiv  Detail & Related papers  (2022-01-06T16:25:15Z)
• Magnetic-field resilience of 3D transmons with thin-film Al/AlO$_x$/Al Josephson junctions approaching 1 T [0.0]
  We investigate the effect of in-plane magnetic fields up to 1 T on the spectrum and coherence times of thin-film 3D aluminum transmons. Thin-film aluminum Josephson junctions are a suitable hardware for superconducting circuits in the high-magnetic-field regime.
  arXiv  Detail & Related papers  (2021-11-01T17:43:15Z)
• Flopping-mode electric dipole spin resonance in phosphorus donor qubits in silicon [0.0]
  Single spin qubits based on phosphorus donors in silicon are a promising candidate for a large-scale quantum computer. We present a proposal for a flopping-mode electric dipole spin resonance qubit based on the combined electron and nuclear spin states of a double phosphorus donor quantum dot.
  arXiv  Detail & Related papers  (2021-05-06T18:11:00Z)
• Surpassing the Energy Resolution Limit with ferromagnetic torque sensors [55.41644538483948]
  We evaluate the optimal magnetic field resolution taking into account the thermomechanical noise and the mechanical detection noise at the standard quantum limit. We find that the Energy Resolution Limit (ERL), pointed out in recent literature, can be surpassed by many orders of magnitude.
  arXiv  Detail & Related papers  (2021-04-29T15:44:12Z)
• Quantum Sensors for Microscopic Tunneling Systems [58.720142291102135]
  tunneling Two-Level-Systems (TLS) are important for micro-fabricated quantum devices such as superconducting qubits. We present a method to characterize individual TLS in virtually arbitrary materials deposited as thin-films. Our approach opens avenues for quantum material spectroscopy to investigate the structure of tunneling defects.
  arXiv  Detail & Related papers  (2020-11-29T09:57:50Z)
• Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices [62.997667081978825]
  We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
  arXiv  Detail & Related papers  (2020-11-16T08:03:44Z)
• Superconducting granular aluminum resonators resilient to magnetic fields up to 1 Tesla [0.0]
  Superconducting granular aluminum reaches kinetic sheet inductances in the nH/$square$ range. Small perpendicular magnetic fields, in the range of 0.5mT, enhance $Q_mathrmi$ by approximately 15%.
  arXiv  Detail & Related papers  (2020-06-09T10:36:13Z)
• 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)

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.