QFT and vacuum energy
22988
Are vacuum fluctuations really happening all the time?
141561
What does it mean for a QFT to not be well-defined?
17451
Expanding electromagnetic field Lagrangian in terms of gauge field
58919
Prerequisites for ‘Quantum field theory and representation theory: a sketch’ [arXiv:hep-th/0206135]
63807
Scalar Field Theories
79708
Is the energy density of vacuum uniform in the whole universe?
151173
Is the quantum action principle of Schwinger a variational principle?
40340
How general is the Lagrangian quantization approach to field theory?
49514
Do we have a better understanding of what energy is since Feynman's time?
67261
How does a perturbation theory make sense in quantum field theory?
141320
Particle energy in general relativity?
156467
Does $\langle\Omega|\mathrm{e}^{\mathrm{i}Px}=\langle\Omega|\mathrm{e}^{\mathrm{i}0x}$? $(\langle\Omega| =$ ground state of the interacting theory)
23448
Renormalized mass
410
QM and Renormalization (layman)
119309
Anomalies in QFT
117705
Vacuum and repulsive gravity
155046
How does QFT help with entanglement?