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
New approach to form non-equilibrium structures
Nike krypton laser achieves spot in Guinness World Records
Unleashing the power of quantum dot triplets

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