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Stephen Barr said about the book, "Like the famous Feynman Lectures on Physics, this book has the flavor of a good blackboard lecture". [3] Michael Peskin's review in Classical and Quantum Gravity said, "This is quantum field theory taught at the knee of an eccentric uncle; one who loves the grandeur of his subject, has a keen eye for a slick argument, and is eager to share his repertoire of ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 February 2025. There is 1 pending revision awaiting review. Indian-American alternative medicine advocate This article is about the author and alternative medicine advocate. For the former director of Canada Post, see Deepak Chopra (Canada Post). Deepak Chopra Chopra in 2019 Born (1946-10-22) October ...
In theoretical physics, quantum field theory (QFT) is a theoretical framework that combines field theory and the principle of relativity with ideas behind quantum mechanics. [ 1 ] : xi QFT is used in particle physics to construct physical models of subatomic particles and in condensed matter physics to construct models of quasiparticles .
Quantum mechanics is a fundamental theory that describes the behavior of nature at and below the scale of atoms. [2]: 1.1 It is the foundation of all quantum physics, which includes quantum chemistry, quantum field theory, quantum technology, and quantum information science.
Physicist Murray Gell-Mann coined the phrase "quantum flapdoodle" to refer to the misuse and misapplication of quantum physics to other topics. [21] An example of such use is New Age guru Deepak Chopra's "quantum theory" that aging is caused by the mind, expounded in his books Quantum Healing (1989) and Ageless Body, Timeless Mind (1993). [21]
In physics, particularly in quantum field theory, configurations of a physical system that satisfy classical equations of motion are called on the mass shell (on shell); while those that do not are called off the mass shell (off shell).
The Tao of Physics was completed in December 1974, and the implications of the November Revolution one month earlier that led to the dramatic confirmations of the standard-model quantum field theory clearly had not sunk in for Capra (like many others at that time). What is harder to understand is that the book has now gone through several ...
In quantum field theory in curved spacetime, there is a whole class of quantum states over a background de Sitter space which are invariant under all the isometries: the alpha-vacua. Among them there is a particular one whose associated Green functions verify a condition (Hadamard condition) consisting to behave on the light-cone as in flat space.