Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Classical Physics
Quantum Physics
Quantum Interpretations
Special and General Relativity
Atomic and Condensed Matter
Nuclear and Particle Physics
Beyond the Standard Model
Cosmology
Astronomy and Astrophysics
Other Physics Topics
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Classical Physics
Quantum Physics
Quantum Interpretations
Special and General Relativity
Atomic and Condensed Matter
Nuclear and Particle Physics
Beyond the Standard Model
Cosmology
Astronomy and Astrophysics
Other Physics Topics
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Physics
Quantum Physics
Quantum analog of Boltzmann entropy?
Reply to thread
Message
[QUOTE="vanhees71, post: 6866175, member: 260864"] I find this is a lot of talk but no clear exposition of what the authors criticize about the standard definition of entropy a la Shannon, Jaynes, and von Neumann. That the H-theorem holds for closed systems only when a macroscopic coarse-grained description is used, follows from this more general concept of entropy. If you keep full information about the state of the closed system, its time evolution is described by unitary time evolution and thus entropy is conserved. If you refer to the time evolution of an open system, usually you get the H-theorem, i.e., that the corresponding entropy increases, and equilibrium is thus characterized by maximum entropy (under the given constraints about additive conserved quantities). [/QUOTE]
Insert quotes…
Post reply
Forums
Physics
Quantum Physics
Quantum analog of Boltzmann entropy?
Back
Top