Theory can sort order from chaos in complex quantum systems RiceUniversity PNASNews
"In thinking about the motions of individual molecules at quantum scale, there is often this comparison to the way we think of the solar system," Wolynes said."You learn that there are eight planets in our solar system, each one with a well-defined orbit. But in fact, the orbits interact with each other. Nevertheless, the orbits are very predictable. You can go to a planetarium, and they'll show you what the sky looked like 2,000 years ago.
Things are more complicated when the molecules also dramatically change structure, for instance as a result of a chemical reaction. "Because they're very light, electrons normally move thousands of times faster than the centers of the atoms, the nuclei," he said."So though they are constantly moving, the electrons' orbits smoothly adjust to what the nuclei do. But every now and again, the nuclei come to a place where the electronic energies will almost be equal whether the excitation is on one molecule or on the other. That's what's called a surface crossing.
The Logan-Wolynes theory opens up a wide array of scientific inquiry ranging from the theoretical exploration of the fundamentals of quantum mechanics to practical applications.
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