Do the virtual particles have any mathematical meaning in vacuum in absense of real quanta?
38703
Do virtual particles actually physically exist?
64240
Can we measure "wavefunction" of quantum particles?
149741
Review: If true, what makes the vacuum of a local ${\rm U(1)}$ gauge theory unique?
135348
Is Zitterbewegung an artefact of single-particle theory?
29728
Does the vacuum in QFT have nonzero energy or not?
12433
How do $\pi^0$ particles exist?
26806
Virtual photons, what makes them virtual?
156879
"Reality" of EM waves vs. wavefunction of individual photons - why not treat the wave function as equally "Real"?
36192
Are virtual particles only a fictive tool in equations?
34021
What is the physical meaning of a "complete" Hilbert space in QM?
1613
Is temperature in vacuum zero?
35694
Can virtual particles be thought of as off-shell Fourier components of a field?
57502
Do electrons really perform instantaneous quantum leaps?
97466
what is the relationship between the dynamical casimir effect and virtual particles?
148541
Quantization of a particle on a spherical surface
41470
Is the density operator a mathematical convenience or a 'fundamental' aspect of quantum mechanics?
26817
Quantum Field Theory from a mathematical point of view