dsaun777 said:
Putting virtual photons aside for now what about real photons being absorbed and their time.weirdoguy said:
So it is unknown...mfb said:
Yes, if it is meaningless then surely it must have meaning as to why its meaningless.weirdoguy said:
dsaun777 said:
Maybe time is not the right word but electrons do interact with photons and I'm interested in these dynamics.weirdoguy said:
Interesting question ;-)). I'd say it's perpendicular up!weirdoguy said:
As @mfb is saying, then you have to learn QFT (it's fun and addictive ;-)). To answer the question qualitatively: It is impossible to intepret the QFT dynamics in terms of particles during the "interaction process". That's why what's usually calculated with QFT are socalled S-matrix elements, describing the probalities that in a scattering process a given "asymptotic free incoming state" (for technical reasons usually two particles like the two protons colliding in the LHC, far away from each other so that you can assume them to be non-interacting) goes into a given other "asymptotic free outgoing state", i.e., some particles that are far enough from each other so that you can consider them as non-interacting.dsaun777 said:
QFT or QED? I want to know photon electron interactions nothing else for now.mfb said:
Anyway, if you really want to delve smoothly into technicalities I recommend Klaubers Student Friendly Quantum Field Theory. It focuses on QED only, most of the derivations are outlined in great details and Klauber devotes one whole chapter to show that pop-sci myth about virtual particles (or whatever) popping in and out of existence has no basis in QFT.How well does nutshell cover qed and qft in comparison?weirdoguy said:Well, one usually starts learning QFT from QED so
) that Zee tried to fit too much in his nutshell and it didn't end up well. It may be a good read, but after you know something on the subject, so that you won't be distracted by some things that didn't end up well didactically.You mean Zee's book? It's funny to read if you know QFT already. I've no clue, how one can understand it if you don't already know it from this book. It's too brief and partly superficial. My favorite intro book isdsaun777 said:
Why Schwartz? Is he a relative or somethingvanhees71 said:
. I have a friend that is sending me Kaku's quantum field theory a modern introduction, any thoughts on that?In QED, photons interact with electrons through the process of absorption and emission. When a photon is absorbed by an electron, it causes the electron to jump to a higher energy level. When the electron falls back to its original energy level, it emits a photon.
The absorption and emission of photons by electrons is a fundamental process in quantum electrodynamics (QED). It explains how light interacts with matter and is essential in understanding the behavior of particles at the atomic and subatomic level.
Yes, according to QED, electrons can absorb and emit multiple photons at once. This process is known as multi-photon absorption and emission and is observed in certain physical phenomena, such as the photoelectric effect.
The energy of photons determines the frequency and wavelength of light, which in turn affects their interaction with electrons. Higher energy photons have a shorter wavelength and are more likely to be absorbed by electrons, causing them to jump to higher energy levels.
QED's understanding of photons and electrons has led to numerous technological advancements, such as the development of lasers, solar cells, and medical imaging techniques. It also plays a crucial role in fields such as quantum computing and telecommunications.