The SchrÃ¶dinger equation for these things cannot be solved exactly due to the presence of multiple electrons and nuclei.
Quantum degrees of freedom in these systems are treated as fictitious classical variables in a method named for Car and Parrinello; that method successfully reproduces the KohnÂ–Sham equations. The Boltzmann equation relies on an assumption of uncorrelated velocities named for this type of "chaos." The Verlet algorithm integrates Newton's laws for use in the "dynamics" named for these systems. They are the (*) larger of the two types of systems whose interactions are described by the LennardÂ–Jones potential. The larger parts of these systems are held fixed in the BornÂ–Oppenheimer approximation. The SchrÃ¶dinger equation for these things cannot be solved exactly due to the presence of multiple electrons and nuclei. For 10 points, name these groups of atoms held together by bonds.
Quantum degrees of freedom in these systems are treated as fictitious classical variables in a method named for Car and Parrinello;
molecules [or word forms like molecular]