Loss and decoherence in superconducting circuits on silicon: Insights
from electron spin resonance
- URL: http://arxiv.org/abs/2402.03889v1
- Date: Tue, 6 Feb 2024 10:53:59 GMT
- Title: Loss and decoherence in superconducting circuits on silicon: Insights
from electron spin resonance
- Authors: Aditya Jayaraman, Andrey V. Danilov, Jonas Bylander and Sergey E.
Kubatkin
- Abstract summary: Solid-state devices used for quantum computation and quantum sensing applications are adversely affected by loss and noise caused by spurious, charged two-level systems (TLS) and stray paramagnetic spins.
We use an on-chip electron spin resonance technique, with niobium nitride (NbN) superconducting resonators, to study surface spins on silicon and the effect of post-fabrication surface treatments.
We observe a 3-to-5-fold reduction in the total density of spins after surface treatments, and demonstrate the efficacy of ESR spectroscopy in developing strategies to mitigate loss and decoherence in quantum systems.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Solid-state devices used for quantum computation and quantum sensing
applications are adversely affected by loss and noise caused by spurious,
charged two-level systems (TLS) and stray paramagnetic spins. These two sources
of noise are interconnected, exacerbating the impact on circuit performance. We
use an on-chip electron spin resonance (ESR) technique, with niobium nitride
(NbN) superconducting resonators, to study surface spins on silicon and the
effect of post-fabrication surface treatments. We identify two distinct spin
species that are characterized by different spin-relaxation times and respond
selectively to various surface treatments (annealing and hydrofluoric acid).
Only one of the two spin species has a significant impact on the TLS-limited
resonator quality factor at low-power (near single-photon) excitation. We
observe a 3-to-5-fold reduction in the total density of spins after surface
treatments, and demonstrate the efficacy of ESR spectroscopy in developing
strategies to mitigate loss and decoherence in quantum systems.
Related papers
- A New Bite Into Dark Matter with the SNSPD-Based QROCODILE Experiment [55.46105000075592]
We present the first results from the Quantum Resolution-d Cryogenic Observatory for Dark matter Incident at Low Energy (QROCODILE)
The QROCODILE experiment uses a microwire-based superconducting nanowire single-photon detector (SNSPD) as a target and sensor for dark matter scattering and absorption.
We report new world-leading constraints on the interactions of sub-MeV dark matter particles with masses as low as 30 keV.
arXiv Detail & Related papers (2024-12-20T19:00:00Z) - Revealing spin-flip two-level systems using ultra-thin film superconducting resonators [3.9216886385274647]
Material disorders are major sources of noise and loss in solid-state quantum devices.
In this work, employing ultra-thin TiN superconducting resonators, we reveal anomalous TLS behaviors.
A spin-flip TLS model is proposed, in which an effective spin-orbit coupling is generated by inhomogeneous local magnetic fields from defect spins.
arXiv Detail & Related papers (2024-12-20T12:49:50Z) - Theory of optical spin polarization of axial divacancy and nitrogen-vacancy defects in 4H-SiC [0.0]
In this work, we theoretically investigate the microscopic magneto-optical properties and spin-dependent optical loops.
We show that fine interactions, including spin-orbit coupling and spin-spin interaction, are fully characterized to provide versatile qubit functional parameters.
This work not only reveals the mechanism underlying the optical spin polarization but also proposes productive avenues for optimizing quantum information processing tasks.
arXiv Detail & Related papers (2024-09-16T12:31:43Z) - Surface Modification and Coherence in Lithium Niobate SAW Resonators [0.0]
Lithium niobate is a promising material for developing quantum acoustic technologies.
At radio and cryogenic temperatures, these resonators are limited by the presence of decoherence and dephasing.
We fabricate several lithium niobate acoustic wave resonators and apply different processing steps that modify their surfaces.
arXiv Detail & Related papers (2023-06-26T16:17:32Z) - Quantum acoustic Fano interference of surface phonons [0.0]
We present measurements revealing Fano interference of a resonantly trapped piezoelectric surface acoustic wave (SAW) mode with a broad continuum of surface phonons in a system consisting of a SAW resonator coupled to a superconducting qubit.
The experiments highlight the existence of additional weakly coupled mechanical modes and their influence on the qubit-phonon interaction and underscore the importance of phononic interference in quantum acoustic architectures that have been proposed for quantum information processing applications.
arXiv Detail & Related papers (2023-02-02T17:58:44Z) - Probing dynamics of a two-dimensional dipolar spin ensemble using single
qubit sensor [62.997667081978825]
We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal.
We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder.
Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
arXiv Detail & Related papers (2022-07-21T18:00:17Z) - Electromagnetically induced transparency in inhomogeneously broadened
divacancy defect ensembles in SiC [52.74159341260462]
Electromagnetically induced transparency (EIT) is a phenomenon that can provide strong and robust interfacing between optical signals and quantum coherence of electronic spins.
We show that EIT can be established with high visibility also in this material platform upon careful design of the measurement geometry.
Our work provides an understanding of EIT in multi-level systems with significant inhomogeneities, and our considerations are valid for a wide array of defects in semiconductors.
arXiv Detail & Related papers (2022-03-18T11:22:09Z) - Quantum sensitivity limits of nuclear magnetic resonance experiments
searching for new fundamental physics [91.6474995587871]
Nuclear magnetic resonance is a promising experimental approach to search for ultra-light axion-like dark matter.
We consider a circuit model of a magnetic resonance experiment and quantify three noise sources: spin-projection noise, thermal noise, and amplifier noise.
arXiv Detail & Related papers (2021-03-10T19:00:02Z) - 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) - Effect of phonons on the electron spin resonance absorption spectrum [62.997667081978825]
We model the effect of phonons and temperature on the electron spin resonance (ESR) signal in magnetically active systems.
We find that the suppression of ESR signals is due to phonon broadening but not based on the common assumption of orbital quenching.
arXiv Detail & Related papers (2020-04-22T01:13:07Z)
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.