2016年9月21日 · In electrostatics, self energy of a particular charge distribution is the energy of required to assemble the charges from infinity to that particular configuration, without accelerating the charges. It is simply called the electrostatic potential energy stored in the system of charges. For a simple example, consider an electrostatic field $\vec ...

2022年10月20日 · Both the self-energy and the vertex corrections are results of interactions in the theory, and usually we calculate them numerically or perturbatively. $^*$ I am making here some simplifying assumption for the sake of clarity, like that the interactions are only localized in time, or that the relevant fully dressed GF is the one particle one etc.

2009年6月25日 · The energy corresponding to this self-interaction is called "self-energy". In order to compensate this infinite self-interaction contribution one adds (infinite) counterterms to the Hamiltonian, thus restoring the correct value (=1) of the particle-particle scattering probability and making sure that amplitudes for other scattering events are ...

2020年3月24日 · Self-energy of a uniformly charged, non-conducting sphere, using energy density formula. Ask Question ...

2018年1月30日 · By definition of Gravitation Self Energy, The gravitational self-energy is equal to the amount of work done in assembling together its infinitesimal particles initially lying infinite distance apart. $$\implies U_{self}=-\dfrac{GM^2}{2R}$$

The self-energy $$ \Sigma~=~G_0^{-1}-G_c^{-1}\tag{2}$$ in general consists of connected diagrams with 2 amputated legs such that the 2 legs cannot be disconnected by cutting a single internal line, cf. e.g. my Phys.SE answer here. NB: Note in particular that the self-energy (2) may contain non-1PI diagrams with tadpoles, cf. OP's diagrams.

Classical vs. Quantum self energy. The behavior of the self-energy in quantum electrodynamics is completely different from the behavior in classical electrodynamics. The self-energy diagram for the electron is only log divergent, while the classical sphere of radius r has a self-energy which diverges as 1/r.

I am studying Special Relativity. When calculating the Electrostatic Energy of Point Charges, there is self energy which is infinite due to the interaction between the charge and the Coulomb potential produced by itself. The author said this should be ignored as it has no physical interest.

2004年3月16日 · In textbook (ohanian) says that it takes work to assemble the point charge out of infinitesimal pieces of charge.The energy needed to assemble the point charge is called the self-energy of the point charge.I know that this explanation is clear enough.But as i know e=1.6*10^-19 C , the charge of electron or proton is the smallest charge, and all ...

Unfortunately, I've hit a snag when trying to understand an argument concerning the (retarded) self-energy $\Sigma^R(ε,k)$. Maslov states that in a Fermi liquid, the real part and the imaginary part of the self-energy $\Sigma^R(ε,k)$ are given by