Register to reply

In QFT Lagrangian what is the potential energy exactly?

by alemsalem
Tags: energy, lagrangian, potential
Share this thread:
alemsalem
#1
Jan9-12, 07:51 AM
P: 159
if I have χψ*ψ term in the Lagrangian, the scattering ψψ→ψψ behaves as if we had a potential (non-rel. limit) Exp(-mr)/r.
but when I try to calculate the expectation value of χψ*ψ in any state I get zero.
is that a different kind of potential energy? does it have to do with re-normalization?

Thank!!
Phys.Org News Partner Physics news on Phys.org
Scientists uncover clues to role of magnetism in iron-based superconductors
Researchers find first direct evidence of 'spin symmetry' in atoms
X-ray laser probes tiny quantum tornadoes in superfluid droplets

Register to reply

Related Discussions
Potential Energy Density of Hanging String (Lagrangian) Advanced Physics Homework 7
Electric potential energy and gravitational potential energy of Deuterium nuclear? Advanced Physics Homework 1
Lagrangian for E and B fields, not vector potential? Classical Physics 1
Lagrangian- what potential? Advanced Physics Homework 1
Derive lagrangian: finding potential energy of a particle constrained to a surface Advanced Physics Homework 4