Difference between revisions of "Hauptseminar Moderne Simulationsmethoden WS 2009/Fortgeschrittene Molekulardynamik I"

From ICPWiki
Jump to navigation Jump to search
(No difference)

Revision as of 11:50, 31 January 2012

<setdata> date=07.01.10 topic=Fortgeschrittene Molekulardynamik I: Wie man die freie Energie berechnet speaker=Andreas Irmler tutor=Shervin Rafatnia </setdata>

"{{{number}}}" is not a number.
{{{date}}}"{{{date}}}" contains an extrinsic dash or other characters that are invalid for a date interpretation.

application_pdf.pngVortrag (500 KB)Info circle.png

application_pdf.pngAusarbeitung (267 KB)Info circle.png


Chapter 7

Kurz zum Inhalt

The aim of this seminar would be to give a short introduction to free energy and to discuss some methods of calculating this energy in a MC or MD simulation.

In thermodynamics, the term free energy refers to the amount of work that can be extracted from a system. It is a subtraction of the entropy of a system multiplied by a reference temperature (giving the "unusable energy") from the total energy, yielding a thermodynamic state function which represents the "useful energy".

Free energy governs thermodynamic processes; all systems minimize their free energy to reach equilibrium. Therefore, calculating the free energy of a system is of great importance. But doing so in a simulation is not always easy. There are different methods to calculate the free energy of a system in MD or MC simulations. One can mention the thermodynamic integration method, the particle insertion method, overlapping distribution method, umbrella sampling and a few others.


1. Einleitung
2. Thermodynamische Integration
3. Widom's Teilcheneinsetzungsmethode
4. Histogramm-Methoden