Fundamental Quantity and Equations for Electromagnetics from Classical to Quantum
July 18 @ 2:45 pm - 4:00 pm
It has been 160 years now since Maxwell published his equations of electromagnetics (EM) in 1865. Today, these equations have been written in our familiar beautiful form, in terms of fields (E and B) frequently and potentials (A and phi) occasionally. However, since Maxwell-Hertz-Heaviside era, there have been longstanding dilemma to use either fields or potentials (or both) for EM, and for the potentials, which gauge condition should be imposed, e.g. Lorenz gauge, Coulomb gauge, etc. The present talk will introduce new gauge-invariant physical quantity of field-impulses for new fundamental equations of electromagnetics, which can unify all electrostatics, magnetostatics, electrodynamics and quantum-EM interactions. The concept and utilization of field-impulses will be shown to not only resolve the century-old field-potential/gauge dilemma, but also aptly describe quantum-EM (e.g. Aharonov-Bohm) effects. Therefore, in lieu of the traditional fields and/or potentials, the field-impulses can serve as the new fundamental EM quantities, which are useful for replacing the 160-year-old Maxwell equations and other (Lorenz/Coulomb/etc.) ones for classical and quantum. Theoretical formulation and efficient computation with fundamental implicit schemes of finite-difference-time-domain methods will be presented. Several mobile apps for technology-enhanced-learning of electromagnetics and circuits may also be demonstrated if time <a href="http://permits.
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Free pizza and drinks will be available
Speaker(s): Eng Leong Tan,
Room: 233, Bldg: ARC, 25 Templeton St, , ON , Ottawa, Ontario, Canada, K1N 7P6