QFT applications

[debilo]

TL;DR Summary

Are there practical applications of qft?

Hello,

I have a simple question : are there, today, practical applications of qft (elsewhere than in particle physics) ?
By applications, I mean, did we design stuff with the help of this theory ?

Thanks !

 

[mfb]

QFT is used in solid state physics for a large range of applications.

https://en.wikipedia.org/wiki/Quantum_field_theory#Condensed_matter_physics

 

[debilo]

Great, thanks !

 

[vanhees71]

Since almost all of physics is describable by QFT (anything except gravity) anything that you consider as "application of physics" (which is in my opinion all chemistry and engineering and also more and more parts of biology) an "application of QFT".