Tagged Questions
0
votes
1answer
111 views
Strings and QFT: particles moving backward in time?
New question: In string theory and QFT, do particles travel back in time? Not related to antimatter: Do they travel back and forth in time in reality or are these just interpretations of mathematical ...
3
votes
2answers
316 views
Creation of particle anti-particle pairs
I was reading some QFT notes and there is one point that I don't understand, they are justifying why we need QFT saying that the number of particles is not preserved once we consider special ...
1
vote
3answers
154 views
mechanism of annihilation
Can the annihilation of matter and antimatter be explained by the electro-weak interaction?
Can pair-production be explained in the same way?
7
votes
5answers
859 views
Why Negative Energy States are Bad
The argument is often given that the early attempts of constructing a relativistic theory of quantum mechanics must not have gotten everything right because they led to the necessity of negative ...
