Near-Field Terahertz Nanoscopy of Coplanar Microwave Resonators
- URL: http://arxiv.org/abs/2106.12907v2
- Date: Mon, 1 Nov 2021 23:12:55 GMT
- Title: Near-Field Terahertz Nanoscopy of Coplanar Microwave Resonators
- Authors: Xiao Guo, Xin He, Zach Degnan, Bogdan C. Donose, Karl Bertling, Arkady
Fedorov, Aleksandar D. Raki\'c, Peter Jacobson
- Abstract summary: Superconducting quantum circuits are one of the leading quantum computing platforms.
To advance superconducting quantum computing to a point of practical importance, it is critical to identify and address material imperfections that lead to decoherence.
Here, we use terahertz Scanning Near-field Optical Microscopy to probe the local dielectric properties and carrier concentrations of wet-etched aluminum resonators on silicon.
- Score: 61.035185179008224
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Superconducting quantum circuits are one of the leading quantum computing
platforms. To advance superconducting quantum computing to a point of practical
importance, it is critical to identify and address material imperfections that
lead to decoherence. Here, we use terahertz Scanning Near-field Optical
Microscopy (SNOM) to probe the local dielectric properties and carrier
concentrations of wet-etched aluminum resonators on silicon, one of the most
characteristic components of the superconducting quantum processors. Using a
recently developed vector calibration technique, we extract the THz
permittivity from spectroscopy in proximity to the microwave feedline. Fitting
the extracted permittivity to the Drude model, we find that silicon in the
etched channel has a carrier concentration greater than buffer oxide etched
silicon and we explore post-processing methods to reduce the carrier
concentrations. Our results show that near-field THz investigations can be
applied to quantitatively evaluate and identify potential loss channels in
quantum devices.
Related papers
- Quantum Parity Detectors: a qubit based particle detection scheme with meV thresholds for rare-event searches [0.7806419532725035]
Quantum parity detectors (QPDs) use the tremendous sensitivity of superconducting qubits to quasiparticle tunneling events as their detection concept.
We lay out the operating mechanism, noise sources, and expected sensitivity of QPDs based on a spectrum of charge-qubit types and readout mechanisms.
arXiv Detail & Related papers (2024-05-27T14:17:33Z) - Quantized conductance in split gate superconducting quantum point
contacts with InGaAs semiconducting two-dimensional electron systems [0.6179194184465651]
Quantum point contact or QPC -- a constriction in a semiconducting two-dimensional (2D) electron system with a quantized conductance -- has been found as the building block of novel spintronic, and topological electronic circuits.
We report on an innovative realisation of nanoscale SQPC arrays with split gate technology in semiconducting 2D electron systems.
arXiv Detail & Related papers (2023-12-18T14:45:15Z) - Design and simulation of a transmon qubit chip for Axion detection [103.69390312201169]
Device based on superconducting qubits has been successfully applied in detecting few-GHz single photons via Quantum Non-Demolition measurement (QND)
In this study, we present Qub-IT's status towards the realization of its first superconducting qubit device.
arXiv Detail & Related papers (2023-10-08T17:11:42Z) - Erbium emitters in commercially fabricated nanophotonic silicon
waveguides [0.0]
We show that erbium dopants can be reliably integrated into commercially fabricated low-loss waveguides.
Our findings are an important step towards long-lived quantum memories that can be fabricated on a wafer-scale.
arXiv Detail & Related papers (2023-07-26T07:58:05Z) - All-Optical Nuclear Quantum Sensing using Nitrogen-Vacancy Centers in
Diamond [52.77024349608834]
Microwave or radio-frequency driving poses a significant limitation for miniaturization, energy-efficiency and non-invasiveness of quantum sensors.
We overcome this limitation by demonstrating a purely optical approach to coherent quantum sensing.
Our results pave the way for highly compact quantum sensors to be employed for magnetometry or gyroscopy applications.
arXiv Detail & Related papers (2022-12-14T08:34:11Z) - Quantum Sensing with Scanning Near-Field Optical Photons Scattered by an
Atomic-Force Microscope Tip [0.0]
Scattering scanning near-field optical microscopy (s-SNOM) is known as a promising technique for overcoming Abbe diffraction limit.
We propose a quantum model for the suggested system, by employing electric-dipole approximation, image theory, and perturbation theory.
Our proposed scheme can be used for quantum imaging or quantum spectroscopy with high resolution.
arXiv Detail & Related papers (2022-12-09T05:53:51Z) - First design of a superconducting qubit for the QUB-IT experiment [50.591267188664666]
The goal of the QUB-IT project is to realize an itinerant single-photon counter exploiting Quantum Non Demolition (QND) measurements and entangled qubits.
We present the design and simulation of the first superconducting device consisting of a transmon qubit coupled to a resonator using Qiskit-Metal.
arXiv Detail & Related papers (2022-07-18T07:05:10Z) - Slowing down light in a qubit metamaterial [98.00295925462214]
superconducting circuits in the microwave domain still lack such devices.
We demonstrate slowing down electromagnetic waves in a superconducting metamaterial composed of eight qubits coupled to a common waveguide.
Our findings demonstrate high flexibility of superconducting circuits to realize custom band structures.
arXiv Detail & Related papers (2022-02-14T20:55:10Z) - A low-noise on-chip coherent microwave source [0.0]
We report an on-chip device that is based on a Josephson junction coupled to a spiral resonator and is capable of coherent continuous-wave microwave emission.
The infidelity of typical quantum gate operations due to the phase noise of this cryogenic 25-pW microwave source is less than 0.1% up to 10-ms evolution times.
arXiv Detail & Related papers (2021-03-13T04:51:53Z) - 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)
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.