Quantum / gauge field -> Classical limit


by ansgar
Tags: classical, field, gauge, limit, quantum
ansgar
ansgar is offline
#1
May3-10, 04:28 PM
P: 505
Hello all quantum nerds! :D

I have a question regarding the "classical" limit of quantum fields, and in particular gauge fields.

When we for instance do a surface integration in QFT, we let phi -> 0 as V->oo

why? this is said in textbooks to correspond to the "classical limit",

and for gauge fields, one lets the field strength tensor F_mu,nu -> 0 which makes the gauge potential go to zero or a gauge transformation of 0.

So why these boundaries in the "classical" limit (V->oo)

Best regards
Phys.Org News Partner Physics news on Phys.org
Physicists design quantum switches which can be activated by single photons
'Dressed' laser aimed at clouds may be key to inducing rain, lightning
Higher-order nonlinear optical processes observed using the SACLA X-ray free-electron laser

Register to reply

Related Discussions
Classical limit of Quantum Optics Quantum Physics 2
Difference between a classical and quantum field theory? Quantum Physics 0
"quantum to classical transition" or "classical limit"? Quantum Physics 0