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1. chinaXiv:202109.00023 [pdf]

Spectrum Broadening due to Nonselective Linear Absorption

Zhang, Xingchu ; She, Weilong
Subjects: Physics >> Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics

我们对纳灯近红外波段进行了发射光谱的中性吸收实验,并观察了纳灯发射光谱谱线宽度的变化。我们发现当光的强度因吸收变得很低时,这些发射光谱谱线会发生展宽现象,中性滤波片透过率越低,发射光谱的谱线展宽越明显。这是一种不同于已发现的、新的谱线展宽效应。

submitted time 2021-09-14 Hits7Downloads3 Comment 0

2. chinaXiv:202104.00128 [pdf]

On the Dynamic Effect of Infinite Redshift Surface: Lorentz Factor Analysis Method

Jiayu NI; Yuan Tu
Subjects: Physics >> Geophysics, Astronomy, and Astrophysics

The generation of infinite redshift surface is due to the singularity of the Lorentz transformation, according to this fact, analyzing the singularity of the parameters in the Lorentz transform factor, which is named the Lorentz factor analysis method in this paper, can be used to research the dynamic effect of the infinite redshift surface. In this paper, the method is applied to the Reissner-Nordstrom and Kerr-Newman black hole spacetime, which finds that the infinite redshift surface will expand and contract with the observer's radial motion, and the corresponding equations are given clearly. A new proof of the inaccessibility of the time-like singularity in a charged black hole is given, and the inaccessibility of the time-like singularity is proved only related to the electrical nature, it has nothing to do with rotation. The study result of space-like quasi-circular motion observer shows that the infinite redshift surface is consistent with that of the static observer at infinity in this case. The minimum blueshift radius which is proposed in the study of the observer who escapes at the speed of light in normal spacetime, it makes a stronger constraint on black hole parameters than traditional condition. This is a possible reason why it is difficult to form an intermediate-mass black hole, discussion about it can be found at the end of the paper.

submitted time 2021-09-07 Hits7879Downloads468 Comment 0

3. chinaXiv:202108.00098 [pdf]

On the Generalized Uncertainty Principle

Ming-Cheng Chen; Chao-Yang Lu; Jian-Wei Pan
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Generalized Uncertainty Principle (GUP), which manifests a minimal Planck length in quantum spacetime, is central in various quantum gravity theories and has been widely used to describe the Planck-scale phenomenon. Here, we propose a thought experiment based on GUP – as a quantum version of Galileo's falling bodies experiment – to show that the experimental results cannot be consistently described in quantum mechanics. This paradox arises from the interaction of two quantum systems in an interferometer, a photon and a mirror, with different effective Planck constants. Our thought experiment rules out the widely used GUP, and establishes a Quantum Coupling Principle that two physical systems of different effective Planck constants cannot be consistently coupled in quantum mechanics. Our results point new directions to quantum gravity.

submitted time 2021-08-13 Hits1382Downloads147 Comment 0

4. chinaXiv:202101.00003 [pdf]

On dark matter

Xian-Qiao Yu
Subjects: Physics >> The Physics of Elementary Particles and Fields

In this article, I shall propose a new theory of dark matter, in which I introduce a neutral primordial field, which is a new field beyond the standard model. All the standard model elementary particles are produced spontaneously from this field in the Big Bang epoch of the universe and then these produced elementary particles decayed or annihilated in the well-known standard model interactions. The relic of the primordial field appears in a form of vacuum energy can not only give naturally the correct abundance of dark matter in the present universe, but provide a natural solution to the cosmological constant problem as well. We find that the conventional methods of detecting dark matter either fail or have great difficulties to detect the remaining vacuum energy of the primordial field, and how to confirm the existence of the remaining energy of the universe's original energy in experiment is still an open problem.

submitted time 2021-06-29 Hits10930Downloads894 Comment 0

5. chinaXiv:201904.00075 [pdf]

A Possible Modified Dispersion Relation

胡锦文
Subjects: Physics >> Geophysics, Astronomy, and Astrophysics

本文引入了一个参量n来表征不同惯性系间光速的变化。为了满足众所周知的基本原理,又不违背一些可靠的实验结果,我们应该对n施加一些必要的约束。首先,重要的是,n的引入应该符合以下三个原则:(1)我们可以用一个规定的时钟同步来定义整个空间中的时间;(2)时间是均匀的,空间是各向同性的;(3)所有的惯性系统都是等价的,这是对狭义相对论(SR)思想的继承。在n的一些约束条件下,我们构造了一个满足惯性系对称性的一般坐标变换。近年来,许多理论都表现出对超高能量尺度下洛伦兹不变性的破坏的兴趣,例如量子引力,它暗示粒子的能量有一个有限值(称为普朗克能量),而不是从洛伦兹模型导出的无限值。因此我们构造一个n的表达式来描述洛伦兹模型的违逆。进一步,通过与著名的彩虹模型比较,我们发现本文推导的“最大能量”与彩虹模型假设的“最大能量”有一定的关系。

submitted time 2021-06-26 Hits26761Downloads1098 Comment 0

6. chinaXiv:202106.00104 [pdf]

自对偶地图上伊辛模型的相变临界点

张孝伍
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

给定连通地图M=(V,E,F) ,在每个节点v 处赋于一个自旋,每条边上的两个节点有相互作用, 得到地图M 上的伊辛模型.由伊辛模型的对偶变换,给出了自对偶地图上伊辛模型相变临界点K* 的上下界:0.2406≤K*≤0.7218 ,并且得到三维自对偶伊辛模型的相变临界点:K*=0.5269

submitted time 2021-06-22 Hits5103Downloads258 Comment 0

7. chinaXiv:202105.00063 [pdf]

本源司南:高效利用量子资源的量子操作系统

孔伟成; 王俊超; 韩永健; 吴玉椿; 张 昱; 窦猛汉; 方 圆; 郭国平
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

随着超导等量子处理器技术的不断进步,高效利用量子处理器、实现量子计算机与经典计算平台的有效协作,已成为量子计算实用化发展的迫切需求。本源司南就是一种面向此需求的量子操作系统,它提供量子任务调度、量子资源管理、量子程序编译、量子比特自动化校准等服务,统一、高效地管理量子计算资源。本文提出用于本源司南的多量子处理器负载均衡、基于量子线路映射的多量子程序并行计算、基于隐式马尔科夫链的量子比特自动化校准等技术方案,通过将本源悟源等量子计算平台接入本源司南前后的数据对比:在测试4种代表性的量子线路(QFT,GHZ,DJ,BV)实验中相较于BMT算法的映射效果,经过本源司南映射后线路的保真度至少提高10%;在运行GHZ量子线路实验中,本源司南提供的单量子处理器并行计算与多量子处理器负载均衡计算能力使量子处理器的运行效率至少提高120%。本源司南能协同调度量子处理器(QPU)、经典计算机等计算资源,为量子计算的广泛使用提供了有效的资源管理。

submitted time 2021-05-17 Hits8365Downloads952 Comment 0

8. chinaXiv:202103.00131 [pdf]

Direct-writing of two-dimensional diodes by focused ion beams

Tan Yang
Subjects: Physics >> Interdisciplinary Physics and Related Areas of Science and Technology

In the past decade, electronic devices based on graphene and the related two-dimensional (2D) materials have exhibited outstanding figures of merit. However, so far, the fabrication of two-dimensional diodes, as elementary building blocks of electronic devices, still relies on manual or semi-automated handling processing. To unleash their commercial potential, the integration of 2D materials into a fully-automated fabrication line is a critical step. Here, we elucidate the focused ion-beam writing as an automated approach to construct lateral diodes on a 2D heterostructure (MoSe2/G) consisting of the stacked monolayer graphene and MoSe2. Se-defects generated by focused ion writing endow the 2D heterostructure with unique electronic properties like the adjustable work function and the quasi-metallic state, which allows for the construction of the barrier at the boundary of the writing and non-writing region. Benefiting from this feature, the ion-beam-written heterostructure is used to realize rectifying and current regulating diodes. Exhibiting comparable performance to traditional diodes, the rectifying diode has a rectification ratio of ~104, while the current regulative diode has a dynamic resistance larger than 4.5 MΩ. Furthermore, to illustrate practical applications of these diodes in digital logic electronics, AND and OR logic gates are directly inscribed on the heterostructure by ion beams. Our work demonstrates the focused ion-beam writing as an additional strategy for direct-writing of 2D diodes on graphene-based heterostructures.

submitted time 2021-03-24 Hits6159Downloads706 Comment 0

9. chinaXiv:202103.00135 [pdf]

New ordinal relative fuzzy entropy

Yuanpeng He
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

In real life, occurrences of a series of things are supposed to come in an order. Therefore, it is necessary to regard sequence as a crucial factor in managing different kinds of things in fuzzy environment. However, few related researches have been made to provided a reasonable solution to this demand. Therefore, how to measure degree of uncertainty of ordinal fuzzy sets is still an open issue. To address this issue, a novel ordinal relative fuzzy entropy is proposed in this paper taking orders of propositions into consideration in measuring level of uncertainty in fuzzy environment. Compared with previously proposed entropies, effects on degrees of fuzzy uncertainty brought by sequences of sequential propositions are embodied in values of measurement using proposed method in this article. Moreover, some numerical examples are offered to verify the correctness and validity of the proposed entropy.

submitted time 2021-03-23 Hits5703Downloads571 Comment 0

10. chinaXiv:202103.00111 [pdf]

激光干涉仪引力波探测器的特色建设及运营模式研究

蒿巧利; 赵晏强; 周伯柱; 李印结
Subjects: Astronomy >> Astrometry
Subjects: Physics >> Atomic and Molecular Physics

2015年激光干涉仪引力波天文台(Laser Interferometer Gravitational-wave Observatory,LIGO)直接检测到引力波信号,为新物理学和天体物理学带来希望的同时,也掀起激光干涉仪引力波探测器发展的新浪潮。在激光干涉仪引力波探测器从地面到太空蓬勃发展的大背景下,本文从建设历程、技术特色和发展定位、运营模式等方面,开展各探测器的对比研究,归纳出激光干涉仪引力波探测器建设和运营的经验启示,即:激光干涉仪引力波探测器的建设是长期化工程,有助于推动科研容错机制和科学评价机制的完善发展;激光干涉仪引力波探测器的建设是高科技工程,有助于推动多学科技术协同发展;激光干涉仪引力波探测器的建设是国际化工程,有助于推动科研合作健康发展。

submitted time 2021-03-05 Hits13244Downloads1131 Comment 0

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