# Tag Info

## New answers tagged virtual-particles

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"A rapidly moving mirror that turns virtual photons into real ones is the first experimental evidence of the dynamical Casimir effect." http://www.technologyreview.com/view/424111/first-observation-of-the-dynamical-casimir-effect/

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I'll give it a shot. 1) I'm not crazy about the term emitting. The W- boson turns into an Electron and anti Neutrino. Emitting suggests it's still there after the fact. It becomes the Electron and Anti Neutrino. (Source): http://pfnicholls.com/physics/particles4.html 2) Both the electron and anti Neutrino are created at the same time. You can't ...

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Time is going up, and if you keep that in mind I think you can sort out most of your questions. This is a diagram of $\beta$ decay, where a neutron becomes a proton and in the process emits an electron and anti-neutrino. The decay is mediated by the weak force so the $W^-$ boson appears. So let's break down how I went about reading that. We start at the ...

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Virtual particles are not real. Though sounding like a tautology, it is an important one - they are not actual states in the asymptotic Hilbert spaces of a quantum field theory, where particles usually live. They are a name given to internal lines of Feynman diagrams, which, in turn, are mere computational tools in a perturbative approach to QFT. Nothing in ...

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The key to the effect is the idea - really just a conjecture, and as the paper states, "these ideas have not been met without controversy" - that there are materials that are opaque to gravity waves in the same way that conductors are opaque to EM waves. If that's true, then the cavity between parallel plates will contain a reduced set of modes of the ...

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