Local shape of the vapor-liquid critical point on the thermodynamic surface and the van der Waals equation of state

no code implementations • 26 Jan 2021 • Q. H. Liu

Differential geometry is powerful tool to analyze the vapor-liquid critical point on the surface of the thermodynamic equation of state.

Statistical Mechanics Other Condensed Matter Mathematical Physics Mathematical Physics

Breakdown of equipartition of energy for vibrational heat capacity of diatomic molecular gas due to nonvanishing bond length

no code implementations • 15 Dec 2020 • X. Y. Wu, S. Y. Wang, J. R. Yang, X. Wang, Q. H. Liu

When the theorem of equipartition of energy applies to the vibrational degree of freedom within diatomic molecular gas, the bond length is usually taken as zero so that the theorem is valid.

Statistical Mechanics Classical Physics

Charge nonconservation of molecular devices in the presence of a nonlocal potential

no code implementations • 23 Feb 2019 • L. Q. Lai, J. Chen, Q. H. Liu, Y. B. Yu

In the presence of a nonlocal potential in molecular device systems, generally the charge conservation cannot be satisfied, and in literatures the modifications of the conventional definition of current were given to solve this problem.

Mesoscale and Nanoscale Physics