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P-D fusion results in 3He, then D-3He results in a P+D+D turning into P+4He. Isn't that net energy positive at a relatively low temperature without too many neutrons? Some D+D...
Asked on 05/12/2021 by Bram Cohen
0 answerSo we have a Maxwell field coupled to a complex $Phi(x)$(charged) scalar field with mass and self-interaction terms: $$L=-frac{1}{4}F_{munu}F^{munu}+D_{mu}Phi^*D^{mu}Phi-m^2Phi^*Phi-frac{lambda}{6}(Phi^*Phi)^2 $$ Determine the exact form of the covariant derivative $D_{mu}$...
Asked on 05/12/2021
1 answerIt is said that there are detectors that can detect the impact of a single charged particle in transmission electron microscopy (TEM) that do not rely in the conversion of...
Asked on 05/12/2021
1 answerThe question is pretty short. I have been told that unlike for flat spacetime, in curved spacetime we cannot write $g^{mu nu}partial_{nu}f=partial^{mu}f$ With $f$ an scalar function, but...
Asked on 05/12/2021 by alexsanchezcast
3 answerIn this paper by Bender (end of page 3), he says:And, because PT-symmetry is a weaker condition than Hermiticity, there are infinitely many Hamiltonians that are PT-symmetric...
Asked on 05/12/2021
0 answerIt is clear that there is time reversal symmetry for Newton's second law if we have time-independent potential $V(x)$. However, it seems that we still have time reversal symmetry...
Asked on 05/12/2021
2 answerI'm going over Rovelli's Covariant Loop Quantum Gravity notes http://www.cpt.univ-mrs.fr/~rovelli/IntroductionLQG.pdf and in section 2.4.2 "Boundary formalism" he briefly develops how to think about quantum fields in...
Asked on 05/12/2021 by Fiter
1 answerWhy are some forces are considered pseudo-forces while some are considered real or physical forces? The definition of pseudo-forces that I know of is that they exist in noninertial reference...
Asked on 05/12/2021
9 answerI have some serious troubles with understanding the EMF in inductor.Assume we change the current from value $I_0$ to zero by rotating the tumbler of the source.Then...
Asked on 05/12/2021
1 answerI spent the last 2 hours reading up on Feynman's path integral formalism of quantum mechanics. Now, I have a few questions, which are rather very simple, but since unconventional...
Asked on 05/12/2021 by Kabir Khanna
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