Time-dependent molecular fields created by the interaction of an external electro-magnetic field with a molecular system: the derivation of the wave equations. (17th January 2016)

• Record Type: Journal Article
• Authors: Baer, Michael; Mukherjee, Bijit; Mukherjee, Saikat; Adhikari, Satrajit
• Is Part Of: Molecular physics. Volume 114:Number 2(2016)
• Page Start: 227
• Page End: 244
• Publication Date: 2016-01-17
• Subjects: non-adiabatic coupling term -- curl equation -- divergence equation -- wave equation -- molecular field; Molecules -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Molécules -- Périodiques; Chimie physique et théorique -- Périodiques; 539.6.05
• DOI: 10.1080/00268976.2015.1093183
• Languages: English
• ISSNs: 0026-8976

Abstract

ABSTRACT: This article continues a previous study (Int. J. Quantum Chem.114, 1645 (2014)) in which is presented a theory that discusses the possibility to induce a novel field – to be called molecular field – via the interaction of an external electro-magnetic (EM) field and a molecular system. Assuming the molecular system is made up of two coupled adiabatic states the theory leads from three time-space curl equations and one time-space 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 having two features: (1) the field intensity is relatively high enough ; (2) the duration of the interaction is short enough . For this situation, the study reveals that the just mentioned interaction creates two fields that coexist within a molecule: one is just a scalar EM field essentially identical to the external EM field and the other, a vectorial field, produced by the non-adiabatic coupling terms. In addition, we mention that the wave velocities related to these two fields are identical to the wave velocity, c, of the external EM field. Abstract :