Tag Archive for: Entropy
![What is Entropy](https://www.physicsforums.com/insights/wp-content/uploads/2019/06/what_is_entropy.png)
What Thermodynamics and Entropy Means
/
1 Comment
Introduction
The student of thermodynamics, as they consider pistons and ideal gasses and such, often begin to grasp the nature of entropy only to find…
![entanglement_entropy2](https://www.physicsforums.com/insights/wp-content/uploads/2017/06/entanglement_entropy2.png)
Lesson on Entanglement Entropy in Quantum Field Theory
Part 1: Quantum Mechanics[This article expects the reader to have some experience with quantum field theory and path integrals][I should also…
![entanglement_entropy](https://www.physicsforums.com/insights/wp-content/uploads/2017/04/entanglement_entropy.png)
Learn Entanglement Entropy in Quantum Mechanics
Quantum Mechanics(QM) is one of the greatest intellectual achievements in human history. Not only because it describes the world at the microscopic level…
![entropy](https://www.physicsforums.com/insights/wp-content/uploads/2016/08/entropy.png)
How to Determine the Change in Entropy
How do you determine the change in entropy for a closed system that is subjected to an irreversible process?Here are some typical questions we get…
![animationwalk](https://www.physicsforums.com/insights/wp-content/uploads/2015/10/animationwalk.png)
Fun with Self-Avoiding Walks Simulations
This post is about some simulations I did of self-avoiding random walks. These are what they sound like: with each step, the position of the walk moves…
![negative temperature](https://www.physicsforums.com/insights/wp-content/uploads/2015/05/negativetemperature.png)
What are Negative Absolute Temperatures
It's a famous result in thermodynamics that you can't reach absolute zero no matter how hard you try. Also, the definition of absolute zero makes it obvious…
![Thermodynamics](https://www.physicsforums.com/insights/wp-content/uploads/2015/04/thermo_tut.png)
Understanding Entropy and the 2nd Law of Thermodynamics
Introduction
The second law of thermodynamics and the associated concept of entropy have been sources of confusion to thermodynamics students for centuries.…