Time-dependent molecular fields: The derivation of wave equations


  • Date: Apr 5, 2017
  • Time: 10:30 AM (Local Time Germany)
  • Speaker: Prof. Michael Baer
  • The Fritz Haber Center for Molecular Dynamics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
  • Location: Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle (Saale)
  • Room: Seminarraum A.2.20
  • Contact: office.theory@mpi-halle.mpg.de
Time-dependent molecular fields: The derivation of wave equations

This lecture is based on studies given in Int. J. Quantum Chem. 114, 1645 (2014) and Molec. Phys. 114, 227 (2016) and presents a theory related to the possibility to induce a novel field – called the molecular field. This field is produced via the interaction of an external electric field and a molecular system. Assuming the molecular system is made up of two coupled adiabatic states, the theory leads from one spatial curl equation, two space-time curl equations and a space-time divergence equation to a set of decoupled wave equations usually encountered for fields. In the present study, wave equations are derived for an external field with a high intensity and a short duration. For this situation, the study reveals that the just mentioned interaction creates two fields that coexist within a molecule: one is just an initial scalar field essentially identical to the original external electric field and the other, a vectorial field, produced by (two) field dressed non-adiabatic coupling terms (NACT). In addition, we mention that the wave velocities related to these two fields are identical to the wave velocity, v, of the external field.

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