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相关概念视频

Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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Mass Analyzers: Common Types01:19

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Positron Emission Tomography01:29

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
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Tandem Mass Spectrometry01:21

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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called collision-induced...
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Electron Microscope Tomography and Single-particle Reconstruction01:07

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
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多通量过程断层扫描多通量过程断层扫描

Stancho G Stanchev1, Nikolay V Vitanov2

  • 1Center for Quantum Technologies, Faculty of Physics, Sofia University, 5 James Bourchier blvd, 1164, Sofia, Bulgaria. stanchov@phys.uni-sofia.bg.

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概括
此摘要是机器生成的。

我们介绍了一种新的量子过程断层扫描 (QPT) 方法,使用多个网关应用程序来提高准确性. 这种技术减少了状态准备,测量,读取和射击噪声的错误,提供了一个完整的保利转移矩阵 (PTM).

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科学领域:

  • 量子信息科学 量子信息科学
  • 量子计算是一种量子计算.
  • 量子错误减轻的方法

背景情况:

  • 量子过程断层扫描 (QPT) 对于描述量子运算至关重要.
  • 标准QPT方法容易出现错误,例如状态准备和测量 (SPAM) 错误,读取错误和射击噪声.
  • 像随机基准测试这样的现有方法只能提供准确性,而不是完整的过程描述.

研究的目的:

  • 引入一种新的QPT方法,提高精度和准确性.
  • 为了减轻来自SPAM,读数和射击噪声在量子过程表征中的错误.
  • 提供一个全面的保利转移矩阵 (PTM),而不是单一的忠实值.

主要方法:

  • 在同一量子门的多个应用序列上执行QPT.
  • 通过标准QPT测量多通道过程的PTM.
  • 使用代和线性方法 (西尔维斯特方程) 推导单个过程的PTM.
  • 在IBM量子平台上模拟和实验验证该方法.

主要成果:

  • 拟议的多通道QPT方法显著减少了SPAM,读取和射击噪声错误.
  • 模拟证实了代和线性演方法的效率.
  • 在IBMQ_MANILA上对CNOT门的PTM和忠实性的实验性确定.
  • 该方法产生了整个PTM,提供了比仅忠实度指标更多的信息.

结论:

  • 与标准QPT相比,多通道QPT方法提供了更高的准确性和精度.
  • 这种方法有效地对抗量子计算中常见的噪声源.
  • 该技术提供了量子过程的更完整的表征,这对于构建可靠的量子计算机至关重要.