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Discrete dynamics versus analytic dynamics
Toxvaerd, Søren
The Journal of chemical physics, 2014-01, Vol.140 (4), p.044102-044102
[Peer Reviewed Journal]
United States: American Institute of Physics
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Title:
Discrete dynamics versus analytic dynamics
Author:
Toxvaerd, Søren
Subjects:
Dynamic tests
Is Part Of:
The Journal of chemical physics, 2014-01, Vol.140 (4), p.044102-044102
Notes:
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Description:
For discrete classical Molecular dynamics obtained by the "Verlet" algorithm (VA) with the time increment h there exists a shadow Hamiltonian H̃ with energy Ẽ(h), for which the discrete particle positions lie on the analytic trajectories for H̃. Here, we proof that there, independent of such an analytic analogy, exists an exact hidden energy invariance E(*) for VA dynamics. The fact that the discrete VA dynamics has the same invariances as Newtonian dynamics raises the question, which of the formulations that are correct, or alternatively, the most appropriate formulation of classical dynamics. In this context the relation between the discrete VA dynamics and the (general) discrete dynamics investigated by Lee [Phys. Lett. B 122, 217 (1983)] is presented and discussed.
Publisher:
United States: American Institute of Physics
Language:
English
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