Over the last few decades, conical intersections (CoIns) have grown from theoretical
curiosities into common mechanistic features of photochemical reactions, whose function is …

During the past decade the perception of conical intersections has changed. It is now
appreciated that what was once viewed largely as a theoretical curiosity is an essential …

It is proved that if the wave function of a given electronic state changes sign when
transported adiabatically round a loop in nuclear configuration space, then the state must …

The theory of atom-molecule collisions is one of the basic fields in chemi cal physics. Its
most challenging part-the dynamics of chemical reactions-is as yet unresolved, but is …

Intermolecular and Intramolecular Potentials: Topographical Aspects, Calculation, and Functional
Representation via A Double Many‐Body Expansion Method Page 261 INTERMOLECULAR …

Two new proofs are presented for the well‐known noncrossing rule. It is believed that these
proofs are not subject to the objections recently raised against other proofs in the literature …

Longuet-Higgins' theorem, which shows that the existence of intersections between potential
energy surfaces may be deduced from the behaviour of the wavefunction at points remote …

A new coordinate system for describing triatomic molecules is introduced. Within this
coordinate system various to-pological features of importance are discussed. Particular …

We derive the crossing conditions at conical intersections between electronic states in
coupled cluster theory and show that if the coupled cluster Jacobian matrix is nondefective …

Nonadiabatic processes widely exist in photochemistry and photophysics. The theoretical
treatment of nonadiabatic processes is an important challenge in theoretical chemistry. In …