quantum field theory - Modern understanding of zitterbewegung ...
2019年11月7日 · Zitterbewegung is an artifact of mistaking the parameter $\bfx$ as a position observable. Relativistic QFT doesn't have a strict position observable. In relatistic QFT, particle-detection observables can't be both perfectly noise-free and perfectly sharply localized in a finite region of spacetime.
Darwin term and Zitterbewegung - Physics Stack Exchange
2017年4月26日 · The explanation is that due to the zitterbewegung high frequency motion, the central potential gets smeared on the average and acquires the extra Darwin term. Charles Darwin together Gordon, were the first to compute the exact energy levels of the Hydrogen atom using the Dirac equation in 1928, just two years after Dirac discovered his equation.
Is Zitterbewegung an artefact of single-particle theory?
$\begingroup$ the short answer is yes. Zitterbewegung is due to the "small components" of the dirac 4-spinor (the last two components in a Dirac rep. where gamma-0 is diagonal) oscillating with a frequency $2mc^2$, which is entirely due to the little bit of antiparticle mixed up in the particle wavefunction for a nonrelativistic motion.
quantum mechanics - Does Hestenes Zitterbewegung Explain why …
It seems to me that in the paper "The zitterbewegung interpretation of Quantum Mechanics" Foundations of Physics, 20 1213-1232 Prof Hestenes argues that spin is an actual precession of something physical and that complex variables exist in Quantum Mechanics because of this. I have also heard that Geometric Algebra, which I think was invented by ...
Is zitterbewegung physical or not? - Physics Stack Exchange
2018年5月18日 · It appears that zitterbewegung, a frequency associated with the total energy of a particle or system, is widely considered to be an unphysical quantity (e.g., Kobakhidze et.al.), @Lubos Motl, McMil...
Penrose's consideration of the electron's chirality as …
2021年2月9日 · It is tempting to describe Schroedingers "Zitterbewegung" in a similar way but a 'zig' particle having positive energy and a 'zag' particle having negative energy and the coupling between both would be generated by a virtual photon (instead of a Higgs), but that would require that the mass-term in the Dirac-equation would be replaced by ...
quantum mechanics - Direct observation of electron …
2021年6月29日 · Zitterbewegung was a feature of an ancient attempt to interpret a Dirac spinor as a state-vector in the Hilbert space on which observables act, but that interpretation famously doesn't work. But this question isn't asking whether or not zitterbewegung is predicted .
Is light emitted in zitterbewegung? - Physics Stack Exchange
2014年12月19日 · According to the cited article Zitterbewegung is "a theoretical rapid motion of elementary particles". It never was observed. But let us say, that Zitterbewegung is real. The emission of photons is, or the reaction of an higher energy level of this particle to his environment, or takes place during acceleration processes.
Is there any sense in which "quantum fluctuations" are a true ...
2023年4月25日 · But the question really just wants to know how zitterbewegung can be used to derive the form of the Darwin term, which is a perfectly straightforward derivation if you accept that zitterbewegung is a real thing. And I'm looking for a different kind of answer.
Zitterbewegung for massless particle - Physics Stack Exchange
Is it possible for a massless particle to undergo zitterbewegung? In massive Dirac theory the Zitterbewegung frequency comes out to be $2mc^2/\hbar$. It looks like the effect will vanish for a massless particle. But the effect is due to the interference between particle and antiparticle state which is also there for a massless particle.