학술논문
On the lattice ground state of densely packed hard ellipses.
Document Type
Article
Author
Source
Subject
*MONTE Carlo method
*DEGREES of freedom
*COMPUTER systems
*ENERGY policy
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Language
ISSN
0021-9606
Abstract
Among lattice configurations of densely packed hard ellipses, Monte Carlo simulations are used to identify the so-called parallel and diagonal lattices as the two favorable states. The free energies of these two states are computed for several system sizes employing the Einstein crystal method. An accurate calculation of the free energy difference between the two states reveals the parallel lattice as the state with the lowest free energy. The origin of the entropic difference between the two states is further elucidated by assessing the roles of the translational and rotational degrees of freedom. [ABSTRACT FROM AUTHOR]