Quantum computing thread

[sunnymaxi]

China's first Intellectual Property Alliance for

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Industry is set up in

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China's first Intellectual Property (IP) Alliance for Quantum Computing Industry and its affiliated patent pool were established in Beijing on March 23. The alliance aims to bring together the resources of China's quantum computing industry and enhance its development, standardization, and industrialization.

The IP alliance was jointly initiated by Chinese tech giant Baidu, the Beijing Academy of Quantum Information Sciences (BAQIS), and other innovative entities. Its first batch of members totaled eight, covering quantum hardware, software and applications sectors.

Meanwhile, the quantum computing patent pool, under the management of the alliance, is to promote the innovation and development of patent technology in the industry. It will further encourage formulating and implementing the industry standards and strengthen its transformation and application.

The patent pool will mainly focus on seven quantum industrial fields such as measurement and control, security and encryption, architecture and software, quantum error correction (QEC), and algorithms, according to a report by People's Daily.

 

[SanWenYu]

This is quite unceremonious yet very important. USTC made a breakthrough in improving education on quantum physics.

Paper:

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Students’ difficulties with the Dirac delta function in quantum mechanics​

Abstract

In the context of quantum mechanics, students are often asked to use delta functions to solve problems. Here, we investigate three typical problem-solving processes using delta functions: a delta function potential well problem, a position space delta function problem, and a momentum space delta function problem. We studied students’ solutions in written exams and conducted think-aloud interviews. We use the activation, construction, execution, and reflection framework for our analysis. We find that students encountered various difficulties in solving quantum mechanics problems using delta functions. Common challenges included difficulty with establishing expressions of delta functions for position eigenstates, difficulty with expressing the orthonormality of eigenfunctions with continuous spectra using delta functions, difficulty with boundary conditions for delta function potentials, and difficulty with calculating integrals involved delta functions. In particular, students rarely used effective reflective methods to gain confidence in their solutions. We commonly observed this challenge for students in all questions we investigated. In addition, we compare the similarities and differences in the use of delta functions in electrostatics and in quantum mechanics, and discuss possible explanations for the reasoning mechanisms that cause these difficulties. Finally, we discuss the potential pedagogical implications of our findings.

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中国科大在量子物理教育研究领域取得新突破

中新网合肥3月27日电 (记者 吴兰)物理教育研究是物理学的一个新兴领域，特别是量子物理方面的教育研究，还处在方兴未艾的阶段。

记者从中国科学技术大学获悉，该校物理学院的涂涛副教授、李传锋教授、许金时教授和郭光灿院士等老师组成的团队，及时地关注和进入到这一新兴前沿领域。

物理教育研究领域有一个重要的研究方向，是从复杂性科学的视角进行分析。如果一个复杂的电路网络有很多个节点，不同节点之间或者有连接，或者没有连接。只有当这些节点都能以一个连接串联起来时，才达到所谓的渝渗阈值，整个电路网络才导通。

类似的，一个学生的思维神经网络也包含不同的节点，这些节点代表了特定物理领域中的不同知识片段。只有当所有的知识节点都以适当的方式通过一个正确关系相互连接时，学生的思维流程才会达到一个渝渗阈值，这时学生才能够正确地掌握相关物理知识，并正确处理相关物理问题。

中国科大的研究团队综合运用了上述研究模型和方法，通过对物理学院6年时间周期、466名本科生的样本数据的统计分析，研究了学生对于量子物理中Dirac函数的思维过程，发现了有趣的思维流程图景：学生们会有激活相关概念、构建方程式、执行解析计算、检查各个步骤等思维方式，并在三个关键节点上存在着推理困难。

这一成果最近发表于物理教育研究领域的顶尖期刊Physical Review-Physics Education Research上。三位审稿人都对该论文给予了高度评价。

为缩短我国在物理教育研究领域与国际先进国家的差距，中国物理学会一直致力于推动我国在该研究领域的发展。

 

[siegecrossbow]

This is quite unceremonious yet very important. USTC made a breakthrough in improving education on quantum physics.

Paper:

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Students’ difficulties with the Dirac delta function in quantum mechanics​

Abstract

In the context of quantum mechanics, students are often asked to use delta functions to solve problems. Here, we investigate three typical problem-solving processes using delta functions: a delta function potential well problem, a position space delta function problem, and a momentum space delta function problem. We studied students’ solutions in written exams and conducted think-aloud interviews. We use the activation, construction, execution, and reflection framework for our analysis. We find that students encountered various difficulties in solving quantum mechanics problems using delta functions. Common challenges included difficulty with establishing expressions of delta functions for position eigenstates, difficulty with expressing the orthonormality of eigenfunctions with continuous spectra using delta functions, difficulty with boundary conditions for delta function potentials, and difficulty with calculating integrals involved delta functions. In particular, students rarely used effective reflective methods to gain confidence in their solutions. We commonly observed this challenge for students in all questions we investigated. In addition, we compare the similarities and differences in the use of delta functions in electrostatics and in quantum mechanics, and discuss possible explanations for the reasoning mechanisms that cause these difficulties. Finally, we discuss the potential pedagogical implications of our findings.

News:

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中国科大在量子物理教育研究领域取得新突破

中新网合肥3月27日电 (记者 吴兰)物理教育研究是物理学的一个新兴领域，特别是量子物理方面的教育研究，还处在方兴未艾的阶段。

记者从中国科学技术大学获悉，该校物理学院的涂涛副教授、李传锋教授、许金时教授和郭光灿院士等老师组成的团队，及时地关注和进入到这一新兴前沿领域。

物理教育研究领域有一个重要的研究方向，是从复杂性科学的视角进行分析。如果一个复杂的电路网络有很多个节点，不同节点之间或者有连接，或者没有连接。只有当这些节点都能以一个连接串联起来时，才达到所谓的渝渗阈值，整个电路网络才导通。

类似的，一个学生的思维神经网络也包含不同的节点，这些节点代表了特定物理领域中的不同知识片段。只有当所有的知识节点都以适当的方式通过一个正确关系相互连接时，学生的思维流程才会达到一个渝渗阈值，这时学生才能够正确地掌握相关物理知识，并正确处理相关物理问题。

中国科大的研究团队综合运用了上述研究模型和方法，通过对物理学院6年时间周期、466名本科生的样本数据的统计分析，研究了学生对于量子物理中Dirac函数的思维过程，发现了有趣的思维流程图景：学生们会有激活相关概念、构建方程式、执行解析计算、检查各个步骤等思维方式，并在三个关键节点上存在着推理困难。

这一成果最近发表于物理教育研究领域的顶尖期刊Physical Review-Physics Education Research上。三位审稿人都对该论文给予了高度评价。

为缩短我国在物理教育研究领域与国际先进国家的差距，中国物理学会一直致力于推动我国在该研究领域的发展。

Learned about it while studying signal processing course. Pain in the butt stuff, fourier transforms were.

 

[tphuang]

Back in December, SpinQ introduced 3 Portable quantum computers, the first in the world.

Now more recently in the Quantum computing conference, it brought out more impressive stuff like mass produced quantum chips of 2, 10 & 20 qubits, its very own quantum chip EDA which was used to design those quantum chips & Vega quantum measurement & control system

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Looks like this is the first attempt to bring quantum computing to the mass market. It will be a while before technology advance to the point where portable quantum computers will be as easy to use as your home pc.

 

[SimaQian]

This news is simply astounding.

They made this chip. Then they patent the workarounds to enable more stability of chip itself, and improve the yields in the manufacturing of this chip.

All this means is they made this chip, now Huawei will try to find a way to mass produce them.

This leads to a question, that people do not even know how to ask.

What exactly are the computational powers of these quantum chips? More precisely, what are the computational powers of these Chinese made quantum chips?

The first applications of quantum computing are cracking cryptography. Cracking RSA for example, requires brute force large prime integer division. In classical computing this will take million core years brute force computation. The quantum computers make it possible to massively parallel compute in one unit of energy spent.

That is why every government is invested into this. And whats more, every large organization now are massively collecting encrypted network traffic. Save it now, decrypt it later when RSA brute force decrpyting is cheaper. So all modern networks becomes vulnerable once quantum computing is practical.

 

[broadsword]

The first applications of quantum computing are cracking cryptography. Cracking RSA for example, requires brute force large prime integer division. In classical computing this will take million core years brute force computation. The quantum computers make it possible to massively parallel compute in one unit of energy spent.

That is why every government is invested into this. And whats more, every large organization now are massively collecting encrypted network traffic. Save it now, decrypt it later when RSA brute force decrpyting is cheaper. So all modern networks becomes vulnerable once quantum computing is practical.

I'm sure scammers will dearly love to get hold of one.

 

[tphuang]

China Mobile recently had their cloud conference 2023移动云大会
They invited Origin Quantum to discuss about quantum cloud computing acceleration

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They also signed up a few other quantum computing players

签约4家国内领先量子计算企业

but origin quantum is the big player here i think
they also created their quantum computing cloud platform called Wuyue 五岳量子云平台

 

[tphuang]

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Origin quantum has developed a microwave signal matrix device, which is also vividly called a "switch" for quantum chip measurement.

 

[tphuang]

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CAS unveils their 3rd gen photon based quantum computer with 255 photon qubits. pretty impressive stuff. higher than you would find in origin quantum obviously, but CAS is more research based and origin quantum is more about commercializing quantum technology.

also talks about their experiment quantum communication satellite

 

[tphuang]

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Chin Telecom Tianyi quantum communication unveiled. Adds great security in communication