What does "mathematically well defined" quantum field theory mean?
141561
What does it mean for a QFT to not be well-defined?
8539
About the complex nature of the wave function?
142021
Gauge theory for mathematicians?
76648
do quantum fields exist in superposition?
5810
What does it mean that particles are the quanta of fields?
42414
Why there is no unique "recipe" for quantization of a classical theory?
51612
Question About Notation In Field Theory $F(x)$ vs. $F[x]$
92550
What is a quantum field?
125215
Deriving Schrodinger equation from Klein-Gordon QFT with the definition $\psi(\textbf{x},t)\equiv \langle 0|\phi_0(\textbf{x},t)|\psi\rangle$
114901
In what sense is the proper/effective action $\Gamma[\phi_c]$ a quantum-corrected classical action $S[\phi]$?
1491
Correct spaces for quantum mechanics
89528
Formalizing Quantum Field Theory
63473
Is the shorthand $ \partial_{\mu} $ strictly a partial derivative in field theory?
115936
Is there a theorem that says that QFT reduces to QM in a suitable limit? A theorem similar to Ehrenfest's theorem?
33669
In what sense is a scalar field observable in QFT?
35694
Can virtual particles be thought of as off-shell Fourier components of a field?
410
QM and Renormalization (layman)