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Multiplexed Readout of Superconducting Qubits with the UHFQA

15.01.2020

QA Histogram

Frequency-multiplexed readout of qubits is at the heart of superconducting quantum processors and an essential step for scalable architectures. The UHFQA Quantum Analyzer is specifically tailored for this challenge and brings the latest technology to work in your lab - using high level API. In this blog post we demonstrate...

Performing DC I-V Sweeps on the MFIA

10.01.2020

Input Gain and Impedance

Characterizing the impedance of components and materials with the MFIA is done by necessity with an AC signal. However, the MFIA and MFLI can also take DC measurements. This blog post shows how easy it is to take DC measurements, specifically I-V measurements, and highlights a few points to be...

Electrochemical Impedance Spectroscopy of Tap Water

06.01.2020

Nyquist Plot

Introduction Electrochemical impedance spectroscopy (EIS) is a popular non-destructive technique to characterize the physicochemical properties of materials, particularly at the solid-liquid (or electrode-electrolyte) interface. Despite the complexity of the measured data, EIS can be used to study many electrochemical devices (batteries, supercapacitors and fuel cells), dielectric coatings, as well as...

如何设置锁相放大器的低通滤波器

10.12.2019

Image 11

低通滤波器是锁相放大器的重要组成之一,决定了测量的性能。如何设置低通滤波器?低通滤波器的带宽(或者说时间常数)和阶数应该如何选择?在刚开始使用锁相放大器的时候,很多用户都有这样的疑问。对于简单的应用,带宽设置为解调频率的1/10到1/100,阶数设置为3或4,这就可以了。但是,为具体的应用找到最优的设置,可能要花很多时间。为了帮助用户快速地找到最优的设置,我们总结了几条经验跟大家分享。

如何优化锁相放大器测量设置:6条建议

05.12.2019

Lock-in

锁相放大器是经典的,最常见的微弱动态信号测量仪器之一。通常,它测量的是淹没在噪声中的信号。为了将锁相检测信号的能力发挥到极致,有时我们需要对输入信号做必要的处理。在这里,我们总结了几个方面,供大家参考。

A Deep Dive into Data Acquisition with the DAQ Tool

25.11.2019

DAQ

Looking at the heart of experimental science you will find data acquisition. Why? Because even the most perfectly conceived experiment is worth nothing if nobody acquires, analyzes and stores data for further analysis and reproduction of results. Despite its obvious importance, data acquisition does not always receive the necessary attention...

How to Generate QAM Signaling with the HDAWG

25.11.2019

QAM Signalling

Digital modulation is extensively used in telecommunications, radar systems and quantum technologies. Corresponding to every analog modulation technique, i.e., amplitude modulation (AM), phase modulation (PM) and frequency modulation (FM), there is a digital version of signal modulation...

Bioimpedance of a Muscle Contraction

22.11.2019

Arm with Electrodes

Impedance measurements of biological tissue are commonly used in bio-engineering and life sciences to assess the condition and composition of tissue in a non-invasive, reproducible way. In addition, bio-impedance measurements, also known as bioelectrical impedance analysis (BIA) or electrical impedance myography (EIM), can be used to monitor processes such as...

AWG Precompensation for High-Fidelity CZ Gates in Transmon Qubits

02.11.2019

Noise feature of HDAWG 5V range

High quantum gate fidelity is essential for all quantum hardware platforms. Temporal sensitivity to flux noise and flux pulse distortion can pose major limitations to achieving high fidelity with repeatable two-qubit gates in transmon qubits. In a recent publication, Rol and collaborators demonstrated a fast (40 ns), low-leakage (0.1%), high-fidelity...

使用MFIA阻抗分析仪进行自动化二维阻抗扫描

24.09.2019

MFIA with DUT attached

很多器件和材料的阻抗都受到频率和其它参数(例如DC偏置电压)的影响。为了能够完整的表征这些样品,我们需要一种能在两个维度下进行参数扫描的阻抗分析仪。通过使用LabOne自带的任意5个API之一,我们可以轻易控制MFIA阻抗分析仪(或者MFLI锁相放大器和MF-IA升级选件)来进行这种全面参数分析。本文将详细说明如何使用简短的Python 3.7的程序,进行多参数维度的阻抗扫描。

阻抗分析仪的基本精度是什么?

23.09.2019

Reactance Chart

阻抗分析仪的精度是一个重要指标,它定义了器件或样品的实测阻抗和真值的区别大小。因为阻抗分析仪的精度会随着频率和阻抗大小而变化,因此我们使用一种能体现出仪器所能达到的最高精度的指标,即为基本精度,与此同时也能够对不同仪器做横向比较。MFIA阻抗分析仪的基本精度区间很宽,在1 Ohm到1 MOhm和 1 mHz到500 kHz范围内,MFIA可以达到0.05%的基本精度,这对表征不同器件和材料很有帮助。

Resonance Enhancement - A Tale of Two Data Analysis Methods

17.09.2019

Big Data Big Picture

Benefit and Challenge of Resonance Enhancement Resonance enhancement technique is the fastlane toward raising signal well above the noise floor to increase signal-to-noise ratio (SNR) and dynamical range. Such an approach is common for scanning probe microscopy (SPM) or nano-/micro-electromechanical systems (NEMS/MEMS) that rely on mechanical amplification from a vibrating...

Synchronization of Multiple MFLI Lock-in Amplifiers by MDS

16.09.2019

MFLIs rear connection

Introduction Multi-channel signal generation and detection are indispensable in many applications such as multi-qubit quantum computing and multi-sensor systems. Synchronization of signal channels comes to the equation when the temporal sequence of events is of interest, especially for fast physical phenomena with short lifetimes. Zurich Instruments offers the Multi-Device Synchronization...

Are Your Parametric Two-Qubit Gates Limited by the Driving AWG?

13.09.2019

HDAWG Noise Floor

If you are using the Zurich Instruments HDAWG, the answer is no. Let's see why. Parametrically modulated superconducting qubit gates (parametric gates) are usually accomplished by RF-modulation – typically several hundred MHz – of the flux through a mediating coupler element or qubit. Usually, many dBm of signal power are...

Reloading Data into LabOne Modules

29.08.2019

HDF View

LabOne® now supports reloading data into its modules when using the HDF5 file format. Starting from LabOne 19.05, data acquired in modules such as the Sweeper, DAQ, Scope and Spectrum Analyzer, can be reloaded into the same LabOne module. When the data is loaded into the module, it is available...

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