#TFOFA (The Fields Of Forces Around) --- SynTalk

SynTalk thinks about the dynamic nature & origins (since the big bang) of fundamental & emergent forces in the universe. Was there only one force at the time of big bang? How did human beings first recognize & understand both the forces of nature (shamanism, magic, storms, lightning) and the forces more in their control (combat, weapons, hunting, push & pull)? The concepts are derived off / from Aristotle, Galileo, Laplace, Newton, Halley, Oersted, Faraday, Maxwell, Mach, Bohr, Planck, Einstein, Schrodinger, Heisenberg, Higgs, Max Jammer, & Karplus / Levitt / Warshel (2013 Chemistry Nobel Prize winners), among others. How is the world held together by the various forces? What exactly is a force field? Can there be force without matter (Yes)? Does matter create its field, or can a field be its own source? How to think of Maxwell’s equations in ‘free space’, and why we need matter (as sources for (say) microphones & radio)? How do forces act at a distance? Why do we try to create early universe conditions in large colliders, and study strong & weak forces? How did the forces separate (gravitation, electromagnetism, weak & strong forces, in that order) as the universe cooled down? Why don’t bodies simply move in a straight line, and links with the concept of ‘natural motion’? Is it (even) possible to know why forces exist? Is Big Bang the new ‘prima mobilia’, and how much more do we conceptually know about forces now? How do strongly interacting (uncertain) electrons / atoms get confined in a classical body, and links with concepts of multiscaling (QM/MM; Quantum Mechanics/Molecular Mechanics) and the mesoscopic world? Why an electrical circuit is difficult to understand in terms of electromagnetic field theory. How forces bind parts together and why / how a different whole sometimes emerges? How the degrees of freedom get frozen as the number of bodies increase. Why did Bohr’s premise of simply quantizing angular momentum did not work for many-electron atoms (beyond hydrogen-like atoms)? Link of the grey zone (‘interface region’) between quantum mechanics & classical mechanics with drugs, proteins, buildings, brain, cricket ball, polymers, spark plug, steering wheel, effective theory, & wave-particle duality. How does a magnet defeat the earth and pull a piece of iron, and its links with gauge theory (with all three forces, except gravity) and the possibility of gravity as an entropic or emergent force? Are market, political, or life forces similar entropic forces? Why is gravity difficult to unify with the other forces? Has ‘force’ replaced ‘energy’ since mid 19th century (after the energy-ists)? Are a different set of forces likely to govern dark matter and dark energy? Is force just a defined concept and not purely fundamental? The SynTalkrs are: Prof. S. D. Agashe (electrical engineering, history & philosophy of science, IITB, Mumbai), Dr. Sourav Pal (quantum chemistry, NCL, Pune), Prof. Sreerup Raychaudhuri (particle physics, TIFR, Mumbai).