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Our Changing Views of Photons - A Tutorial Memoir (Paperback)
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Our Changing Views of Photons - A Tutorial Memoir (Paperback)
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Advances in technology often rely on a world of photons as the
basic units of light. Increasingly one reads of photons as
essential to enterprises in Photonics and Quantum Technology, with
career and investment opportunities. Notions of photons have
evolved from the energy-packet crowds of Planck and Einstein, the
later field modes of Dirac, the seeming conflict of wave and
particle photons, to the ubiquitous laser photons of today. Readers
who take interest in contemporary technology will benefit from
learning what photons are now considered to be, and how our views
of photons have changed — in learning about the various
operational definitions that have been used for photons and their
association with a variety of quantum-state manipulations that
include Quantum Information, astronomical sources and crowds of
photons, the boxed fields of Cavity Quantum Electrodynamics and
single photons on demand, the photons of Feynman and Glauber, and
the photon constituents of the Standard Model of Particle Physics.
The narrative points to contemporary photons as causers of change
to atoms, as carriers of messages, and as subject to controllable
creation and alteration — a considerable diversity of photons,
not just one kind. Our Changing Views of Photons: A Tutorial Memoir
presents those general topics as a memoir of the author's
involvement with physics and the photons of theoretical Quantum
Optics, written conversationally for readers with no assumed prior
exposure to science. It offers lay readers a glimpse of scientific
discovery — of how ideas become practical, as a small scientific
community reconsiders its assumptions and offers the theoretical
ideas that are then developed, revised, and adopted into technology
for daily use. For readers who want a more detailed understanding
of the theory, three substantial appendices provide tutorials that,
assuming no prior familiarity, proceed from a very elementary start
to basics of discrete states and abstract vector spaces; Lie
groups; notions of quantum theory and the Schrödinger equation for
quantum-state manipulation; Maxwell's equations for
electromagnetism, with wave modes that become photons, possibly
exhibiting quantum entanglement; and the coupling of atoms and
fields to create quasiparticles. The appendices can be seen as a
companion to traditional textbooks on Quantum Optics.
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