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Uncertainty principle and uncertainty

2019-09-09 来源: 51Due教员组 类别: Essay范文

下面为大家整理一篇优秀的essay代写范文- Uncertainty principle and uncertainty,供大家参考学习,这篇论文讨论了不确定性原理与不确定性。不确定性与确定性是一组对立的存在,不确定性是对确定性的基本否定。确定性从字面上来看就是指明确与肯定,从语言学及深层次哲学角度来看:确定性是指事物在质与量上的唯一、纯粹和极端。通常确定一件事情就是要达成一定的目标,但追求目标过程中我们发现客观世界更普遍的却是难以把握的不确定性。

The uncertainty principle fully embodies the wave-particle duality of microscopic particles. The experiments to verify it are completed through the diffraction of electrons, neutral potassium atoms and other physical particles, the experimental study of the wave property of light is prior to the study of quantum mechanics. Single-slit diffraction and double-slit interference are regarded as wave phenomena, so the wave-particle duality of a particle is determined when it is proved that a particle can diffraction and interfere. However, in the early stage of the development of quantum mechanics, it did not rely too much on the experimental results of particle diffraction and interference. In reality, people also recognized the particle properties as wave light, and gradually came into contact with the wave properties of real particles. The experimental results of single slit diffraction can make people more clearly understand the particle wave-particle duality and the uncertainty principle, in the electronic single slit diffraction and single slit diffraction of light and similar experiments, electronic through after the first slit collimation again through the second small slit, arrived at screen appear similar Yu Guangbo diffraction pattern, confirming what has long been regarded as the particle's electronic volatility. The experiment also found that the narrower the second slit is, the wider the diffraction range is, indicating that the more accurate the particle position measurement is, the less accurate the measurement result of momentum is. The single slit diffraction experiments of various physical particles prove that particles have volatility, namely wave-particle duality, which is an important content of uncertainty principle and the core of quantum theory.

According to the uncertainty principle we know that the position and momentum of a particle cannot be measured at the same time, which makes some concepts in classical mechanics, such as orbital concepts and stationary concepts, invalid. Hawking mentions in a brief history of time that Heisenberg's uncertainty principle is a fundamental and inescapable property of the world that has profound implications for the way we see the world. The uncertainty principle marks the end of the dream of Laplace's scientific theory. If we cannot even measure the present state of the universe, we cannot accurately predict future events. In the dialogue between quantum mechanics and Newtonian classical mechanics, we can find that quantum introduces an unavoidable factor of unpredictability or randomness into science. But despite the uncertainty principle, there is no need to abandon the belief that the laws of physics govern the world.

Uncertainty and certainty are a group of opposite existence, and uncertainty is the basic negation of certainty. Certainty literally means definiteness and affirmation. From the perspective of linguistics and deep philosophy, certainty refers to the unique, pure and extreme of things in quality and quantity. Usually one thing is to achieve a certain goal, but in the pursuit of the goal we find that the objective world is more common is difficult to grasp the uncertainty. Further understanding of the uncertainty principle is inseparable from the analysis of the concept of uncertainty:

From the perspective of epistemology, people are incapable of making accurate predictions about the development process of objective things. Objective things and their development results have been determined, but due to technological backwardness, the results of cognition will be biased, which is an uncertainty dominated by subjectivity. Secondly, the objective material world also has the inherent uncertainty of things, which is unrelated to people's cognitive ability. We call it the objective-oriented uncertainty. Third, there is the uncertainty of the equal emphasis on subject and object, which occupies the dominant position in subjectivity and object respectively at different levels. For example, an important category of philosophy, "freedom", also implies uncertainty, and this uncertainty is not distinguished between subjectivity and object. Fourthly, the uncertainty of submerged infinite cases, in mathematics basic research, infinite is the infinite potential is a never ending process, latent is the uncertainty of the infinite and the above three kinds of different direction, always just an infinite potential and fact infinitely small amount, so there is always such a infinitesimal uncertainty exists, is the infinite potential refers to the infinite as a process, a kind of forever in the process of generating state. This very logical uncertainty has great applications in complex sciences such as mathematics. The first three kinds of uncertainty are all caused by the asymmetry of subject and object, while the uncertainty in the latent infinite sense may be the logic first, so it is more complex and has deeper scientific significance, and will also be the mainstream of future uncertainty research.

In Vienna, Austria hasegawa fishing department professor at the university of science and technology and its collaborators published in January 15, 2012 in the journal nature physics reports carefully designed experiments, the results do not conform to the basic principle of quantum mechanics, the uncertainty principle, but with Japan Nagoya university published in 2003, Mr Ozawa integrity professor revision uncertainty principle, "Mr Ozawa inequality" conform to the well. If so, the revised version of Mr Ozawa's inequality may well play a role in emerging technologies such as quantum information.

In physics, gravitational waves are ripples in the curvature of space-time that travel outward from a source of radiation in the form of waves that transmit energy as gravitational radiation. In 1916, Einstein predicted the existence of gravitational waves based on general relativity. Practical gravitational wave detectors are built on "laser interferometers", which use lasers to see if the distance between mirrors changes.

Many things in real life are difficult and impossible for us to understand and grasp all of them, which results from the general uncertainty of things. Uncertainty principle makes classical mechanics less dazzling, but with the development of science and technology, the idea of uncertainty principle is also put forward. However, there is no denying that both Newton's classical mechanics and quantum mechanics apply scientific principles to real life and have certain practical guiding significance. It is not so much that one advanced doctrine replaces another that is not so popular as that the replacement of old and new doctrines is the handover process in the relay race of human progress. Although modern science has initially formed a challenge to the tradition through physical experiments and mathematical deduction, this is just the beginning. We should also learn from the spirit of scientists who dare to challenge authority and persevere. I hope the human community can use its own wisdom to transform the unknown uncertainty into more certainty.

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