BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Asia/Shanghai BEGIN:STANDARD DTSTART:19910915T010000 TZOFFSETFROM:+0900 TZOFFSETTO:+0800 TZNAME:CST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260603T065810Z UID:35ECFADE-6356-47D1-9F80-5573E7AEF5C2 DTSTART;TZID=Asia/Shanghai:20260804T132000 DTEND;TZID=Asia/Shanghai:20260804T140000 DESCRIPTION:It has been more than 160 years since Maxwell presented his equ ations of electromagnetics (EM) in 1864. Today\, these equations have been written in our familiar beautiful form\, in terms of fields (E and B) typ ically and potentials (A and phi) occasionally. However\, since Maxwell-He rtz-Heaviside era\, there have been longstanding dilemma to use either fie lds 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 fiel d-impulses for new fundamental equations of electromagnetics. Unlike the p otentials that are gauge-dependent and may not be physical nor causal\, th e field-impulses are like fields being gauge-independent\, physically real \, causal and measurable. Using single wave equation in terms of electric field-impulse can provide the complete description of all electromagnetics . The electric field-impulse is the single physical quantity that can unif y not only electrodynamics but also electrostatics and magnetostatics\, wh ich otherwise remain independent and left separated all this while. It can completely embed all fields and potentials attributed to static\, dynamic \, steady or nonsteady charge and/or current distributions. The field-impu lses facilitate the development of finite-difference time-domain (FDTD) me thod for simulating all electromagnetic phenomena\, even including electro statics (recall that traditional Yee’s FDTD has no static charge which c alls for Poisson/Laplace equation!). Moreover\, unlike the fields that und er-describe quantum-EM\, the field-impulse can explain fully the Aharonov- Bohm (AB) effect and appear naturally in Schrodinger equation. The field-i mpulses not only resolve the century-old field-potential/gauge dilemma\, b ut also aptly describe quantum-EM interactions. They constitute the fundam ental physical quantities that are promising for replacing fields\, potent ials\, and ultimately Maxwell equations from classical to quantum. Theoret ical formulation and efficient computation with fundamental implicit schem es of FDTD methods will be presented.\n\nSpeaker(s): \, Tan\n\nSichuan Jin jiang Hotel\, Chengdu\, Sichuan\, China LOCATION:Sichuan Jinjiang Hotel\, Chengdu\, Sichuan\, China ORGANIZER:zzemrs@163.com SEQUENCE:35 SUMMARY:Fundamental quantity and equations for electromagnetics from classi cal to quantum URL;VALUE=URI:https://events.vtools.ieee.org/m/562263 X-ALT-DESC:Description: <br /><p class="MsoNormal" style="margin-bottom: 0c m\; text-align: justify\; text-justify: inter-ideograph\; line-height: nor mal\;"><span lang="EN-SG" style="font-family: 'Times New Roman'\,serif\;"> It has been more than 160 years since Maxwell presented his equations of e lectromagnetics (EM) in 1864. Today\, these equations have been written in our familiar beautiful form\, in terms of fields (E and B) typically and potentials (A and phi) occasionally. However\, since Maxwell-Hertz-Heavisi de era\, there have been longstanding dilemma to use either fields or pote ntials (or both) for EM\, and for the potentials\, which gauge condition s hould be imposed\, e.g. Lorenz gauge\, Coulomb gauge\, etc. The present ta lk will introduce new gauge-invariant physical quantity of field-impulses for new fundamental equations of electromagnetics. Unlike the potentials t hat are gauge-dependent and may not be physical nor causal\, the field-imp ulses are like fields being gauge-independent\, physically real\, causal a nd measurable. Using single wave equation in terms of electric field-impul se can provide the complete description of all electromagnetics. The elect ric field-impulse is the single physical quantity that can unify not only electrodynamics but also electrostatics and magnetostatics\, which otherwi se remain independent and left separated all this while. It can completely embed all fields and potentials attributed to static\, dynamic\, steady o r nonsteady charge and/or current distributions. The field-impulses facili tate the development of finite-difference time-domain (FDTD) method for si mulating all electromagnetic phenomena\, even including electrostatics (re call that traditional Yee&rsquo\;s FDTD has no static charge which calls f or Poisson/Laplace equation!). Moreover\, unlike the fields that under-des cribe quantum-EM\, the field-impulse can explain fully the Aharonov-Bohm ( AB) effect and appear naturally in Schrodinger equation. The field-impulse s not only resolve the century-old field-potential/gauge dilemma\, but als o aptly describe quantum-EM interactions. They constitute the fundamental physical quantities that are promising for replacing fields\, potentials\, and ultimately Maxwell equations from classical to quantum. Theoretical f ormulation and efficient computation with fundamental implicit schemes of FDTD methods will be presented. </span></p> END:VEVENT END:VCALENDAR