A Concise Method for Kinetic Energy Quantisation

Details A Concise Method for Kinetic Energy Quantisation A Concise Method for Kinetic Energy Quantisation

2008-10-15

arxiv.org/abs/0810.2654v1

Physics

Chemical Physics

2 figures

Scientific paper

10.1080/00268970802562117

We present a straightforward method for obtaining exact classical and quantum molecular Hamiltonians in terms of arbitrary coordinates. As compared to other approaches the resulting expression are rather compact, the physical meaning of each quantity is quite transparent, and in some cases the calculation effort will be greatly reduced. We also investigate systems with constrains to find the suggested method to be applicable in contrast to most conventional approaches to kinetic energy operators which cannot directly be applied to constrained systems. Two examples are discussed in detail, the monohydrated hydroxide anion and the protonated ammonia dimer.

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