单个活性粒子在和潜力:关于Jarzynski关系的存在的问题
1Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
Physical review. E
|June 17, 2023
概括
热力学中的一个关键概念Jarzynski关系,一般不适用于活性物质系统. 我们的研究表明,这种热力学关系对于处于静止状态的活性奥恩斯坦-乌伦贝克粒子是失败的.
科学领域:
- 统计力学 统计力学
- 非平衡系统的热力学
- 软物质物理学 软物质物理学
背景情况:
- 活性物质系统本质上处于不平衡状态,因此需要概括热力学描述.
- 贾津斯基关系将一个过程中所做的工作与平衡系统的自由能量差异联系起来.
- 将热力学关系推广到非平衡系统 (如活性物质) 是一个重大挑战.
研究的目的:
- 调查Jarzynski关系在活性物质系统中的有效性.
- 为了确定工作的标准随机热力学定义是否适用于活跃系统.
- 在非平衡条件下分析模型活性物质系统的行为.
主要方法:
- 使用单个热活性奥恩斯坦-乌伦贝克粒子模型.
- 模拟了粒子在一个和潜力范围内.
- 应用标准随机热力学定义来计算工作.
主要成果:
- 发现Jarzynski关系对于活性物质系统一般不适用.
- 当将关系应用于活动系统的静止状态时,观察到偏差.
- 在随机热力学中对工作的标准定义并不总是适用于这些非平衡过程.
结论:
- 贾辛斯基关系需要重新评估,以适用于活性物质.
- 标准热力学工具可能需要修改,以描述活跃的非平衡系统.
- 需要进一步的研究来开发适合活性物质的热力学框架.
相关概念视频
The Quantum-Mechanical Model of an Atom
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra. Schrödinger...
First Law: Particles in One-dimensional Equilibrium
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If we...
First Law: Particles in Two-dimensional Equilibrium
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about the...
Newton's first law tells us about the...
Coulomb's Law and The Principle of Superposition
Coulomb's Law describes the force experienced by two point charges under each other's presence. But what if there are more than two charges? For example, if there is a third charge, does it experience a force that is a simple combination of the individual forces due to the first two charges? Can it be described mathematically?
The Principle of Superposition answers the question. Yes, Coulomb's Law applies to each pair of charges, and the net force on each charge is the vector sum of the...
The Principle of Superposition answers the question. Yes, Coulomb's Law applies to each pair of charges, and the net force on each charge is the vector sum of the...
Potential Due to a Polarized Object
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
Equilibrium Conditions for a Particle
When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...


