Learn the definition of Quantum field theory and browse a collection of 555 enlightening community discussions around the topic.
The aim is not to replace formal books on Quantum Field Theory, but rather to offer a helpful complementary tool for beginners in the field. Features include a reader-friendly introduction to tensor calculus and the concept of manifolds; a simple and robust treatment for dimensional regularization...
your story is already so convincing that you don’t mind thatall observable quantities also become infinite in the limit consideredand that when you instead do a proper renormalization (needed to get the high accuracy predictions quantum field theory is famous for)the whole capital of the vacuum...
This last postulate has a key role in our discussions: we remark that it even holds beyond quantum theory, specifically for space-like separated systems in some axiomatizations of quantum field theory7,8,9,10(Supplementary Information). As originally introduced by Dirac and von Neumann1,2, the...
(Deckle Edge, 2008). Or, take a broader look at quantum physics as a whole in this book, "Quantum Physics for Beginners: From Wave Theory to Quantum Computing. Understanding How Everything Works by a Simplified Explanation of Quantum Physics and Mechanics Principles" by Carl J. Pratt (...
The quantum-field theory allows replacing this interacting many-body problem by a two-body problem consisting of an electron in the conduction band and a hole in the valence band [22]. The electron and the hole interact with the lattice as well as with each other. In such a case, the ...
This pattern continues to higher order, and provides a simple explanation for the full expression we find for the output field: the net amplification/deamplification factor for each kind of quadrature to quadrature scattering process is independent of ϵ0. We find X^(out)[0]=R(ϵ0)X^(in...
We are getting into new theory here with a new thought experiment! If an electron such as those in an electron microscope is accelerated to a high enough speed is then jostled by close encounter with a small barrier, it will generate an identical virtual electron on the other side of the ...
BQuantum Field Theory As Simple As Possible Mar 11, 2025 Replies 2 Views 720 IFar off resonant Rabi oscillations in a 2 level system Mar 9, 2025 Replies 0 Views 453 IDifferent expressions about time reversal and confusion Mar 7, 2025 ...
A more concised and detailed explanation of the interpretation of the parametrized quantum theory is given in ref [4]. Both first and second quantized parametrized theories are straightforward and elegant. They are more general than the conventional constrained theories, nevertheless, they contain ...