written by
Wolfgang Christian,
Trisha Salagaram, and
Nithaya Chetty

The Brute Force Microstates model considers an isolated system consisting of N identical, non-interacting quantum particles. We wish to determine the total number of system microstates accessible to the system with energy E and hence the entropy. This model is a supplemental simulation for the article "Enhancing the understanding of entropy through computation" in the American Journal of Physics 79(11), 1127-1132 (2011).

For distinguishable particles, the simplest brute force method that can be devised involves N nested loops, each over the list of single particle energy levels. This results in a computational scheme that scales exponentially with the system size. Still, this is an instructive method to apply because it shows the rapid increase in the number of microstates for moderate N, and the corresponding exponential increase in computational time. The model displays the computation time as users to vary the number of particles N and the total energy E.

The Brute Force Microstates model was developed by Wolfgang Christian, Trisha Salagaram, and Nithaya Chetty using the Easy Java Simulations (Ejs) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_stp_BruteForceMicrostates.jar file will run the program if Java is installed.

Please note that this resource requires
at least version 1.5 of
Java.

Brute Force Microstates Source Code
The source code zip archive contains an EJS-XML representation of the Brute Force Microstates Model. Unzip this archive in your EJS workspace to compile and run this model using EJS. download 393kb .zip
Last Modified: August 11, 2011
previous versions

<a href="http://www.compadre.org/OSP/items/detail.cfm?ID=11353">Christian, W, T. Salagaram, and N. Chetty. "Brute Force Microstates Model." Version 1.0.</a>

W. Christian, T. Salagaram, and N. Chetty, Computer Program BRUTE FORCE MICROSTATES MODEL, Version 1.0 (2011), WWW Document, (http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11353&DocID=2350).

W. Christian, T. Salagaram, and N. Chetty, Computer Program BRUTE FORCE MICROSTATES MODEL, Version 1.0 (2011), <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11353&DocID=2350>.

Christian, W., Salagaram, T., & Chetty, N. (2011). Brute Force Microstates Model (Version 1.0) [Computer software]. Retrieved May 31, 2016, from http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11353&DocID=2350

Christian, W, T. Salagaram, and N. Chetty. "Brute Force Microstates Model." Version 1.0. http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11353&DocID=2350 (accessed 31 May 2016).

%A Wolfgang Christian %A Trisha Salagaram %A Nithaya Chetty %T Brute Force Microstates Model %D July 30, 2011 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11353&DocID=2350 %O 1.0 %O application/java

%0 Computer Program %A Christian, Wolfgang %A Salagaram, Trisha %A Chetty, Nithaya %D July 30, 2011 %T Brute Force Microstates Model %7 1.0 %8 July 30, 2011 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11353&DocID=2350

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