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相关概念视频

Third Law of Thermodynamics02:38

Third Law of Thermodynamics

22.0K
A pure, perfectly crystalline solid possessing no kinetic energy (that is, at a temperature of absolute zero, 0 K) may be described by a single microstate, as its purity, perfect crystallinity,and complete lack of motion means there is but one possible location for each identical atom or molecule comprising the crystal (W = 1). According to the Boltzmann equation, the entropy of this system is zero.
22.0K
Second Law of Thermodynamics02:49

Second Law of Thermodynamics

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In the quest to identify a property that may reliably predict the spontaneity of a process, a promising candidate has been identified: entropy. Processes that involve an increase in entropy of the system (ΔS > 0) are very often spontaneous; however, examples to the contrary are plentiful. By expanding consideration of entropy changes to include the surroundings, a significant conclusion regarding the relation between this property and spontaneity may be reached. In thermodynamic models, the...
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Second Law of Thermodynamics00:53

Second Law of Thermodynamics

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The Second Law of Thermodynamics states that entropy, or the amount of disorder in a system, increases each time energy is transferred or transformed. Each energy transfer results in a certain amount of energy that is lost—usually in the form of heat—that increases the disorder of the surroundings. This can also be demonstrated in a classic food web. Herbivores harvest chemical energy from plants and release heat and carbon dioxide into the environment. Carnivores harvest the...
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First Law of Thermodynamics00:37

First Law of Thermodynamics

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The First Law of Thermodynamics states that energy cannot be created or destroyed, only transformed. This can be demonstrated within a classic food web where light energy from the sun is harnessed as radiant energy by plants, converted into chemical energy, and stored as complex carbohydrates. The vegetation is then consumed by animals and during the digestion process, the sugars release energy as heat. The sugars also produce chemical energy that either gets used up doing work, stored in...
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First Law of Thermodynamics02:16

First Law of Thermodynamics

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Energy Conservation
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Statements of the Second Law of Thermodynamics01:15

Statements of the Second Law of Thermodynamics

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The second law of thermodynamics can be stated in several different ways, and all of them can be shown to imply the others. The Clausius’ statement of the second law of thermodynamics is based on the irreversibility of spontaneous heat flow. It states that heat will not flow from the colder body to the hotter body unless some other process is involved. Additionally, as per the Kelvin’s statement, it is impossible to convert the heat from a single source into work without any other...
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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
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最小时空长度和时空的热力学.

Valeria Rossi1,2, Sergio L Cacciatori1,2, Alessandro Pesci3

  • 1Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, Via Valleggio 11, 22100 Como, Italy.

Entropy (Basel, Switzerland)
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概括
此摘要是机器生成的。

新兴的重力理论使用热力学将和时空几何联系起来. 通过量子度量实现的最小时空长度解释了重力.

关键词:
新兴的重力引力.地平线热力学热力学最小的长度最小的长度量子重力就是量子重力.

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科学领域:

  • 理论物理 理论物理
  • 量子引力就是量子引力.
  • 热力学是一种热力学.

背景情况:

  • 新兴的引力理论通过热力学视角将时空几何与联系起来.
  • 宏观的重力属性被视为时空的离散小规模结构和信息内容的统计结果.

研究的目的:

  • 审查量子引力理论一般如何暗示最小时空长度.
  • 描述一个方法来实现这种结构独立于量子波动的细节.
  • 讨论微观如何通过热力学产生引力场方程.

主要方法:

  • 对预测最小时空长度的量子引力理论的审查.
  • 实现一个离散的时空结构,使用双张数量子度量 qαβ(x,x').
  • 用热力学变化原理来推导引力场方程的应用.

主要成果:

  • 量子引力理论通常支持最小时空长度.
  • 一个双张力量子度量提供了一个有限的地测距离,确保一个离散的时空结构.
  • 拟议的框架成功地从和热力学中推导出引力场方程.

结论:

  • 具有最小长度的离散时空结构是量子引力的一般特征.
  • 双张力量子度量提供了一个强大的方法来实现这种结构.
  • 适用于微观自由度的热力学原理可以解释新兴的重力.