By Per Olov Lowdin
Content material: detailed vols.: v. forty-one (2002): A tribute to the existence and paintings of Per-Olov Lowdin.-v.42 (2003): see analytic access 118469.-v.44 (2003): see analytic access 88803.-vols. 45,46 (2004): see analytic access 90077.-v. forty eight (2005): Jens Oddershede -- adventurer in quantum chemistry
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This explains the instant local order formation required for the transition to the liquid phase. Similar reasoning is valid for molecular interactions that result in the transition of separate gas molecules to local formations in liquids that represent their instant local ordering. Thus the necessary condition of SB in gas – liquid phase transition, the spontaneous decrease in energy and symmetry by formation of instant local order in liquids from the gas units, may also be presented as initiated by the JT or PJT effect.
Then at his proposition, Prof. Kaplan, a former collaborator of his in Kishinev, invited me to the Jahn –Teller conference in Boston in the Mid-August of 2000. e. a vibronic Jahn –Teller ground state, was correct. There he invited me and my wife to Austin in the following spring. We were both so glad to meet his wife, and the family of his son, and musically very gifted grandson. Isaac was in full swing at the university, writing books, discussing with great wit, and quick to understand – as I had known him for well over thirty years.
The formation of molecules from atoms (or bonding of groups of atoms) is thus another particular case of spontaneous symmetry reductions controlled by the JT vibronic coupling effects as formulated above at the beginning of this section. The differences between the particular cases of JT instability are in the details of the AP behavior at the point of degeneracy: in the proper JT case the level crossing, as mentioned above, is linear in Q (Fig. 1a), in the RT effect it is quadratic (Fig. 1b), in the PJT effect it is quadratic with an energy gap between Fig.