yuggib's user avatar
yuggib's user avatar
yuggib's user avatar
yuggib
  • Member for 8 years, 5 months
  • Last seen more than a month ago
1 vote

What makes coming up with a mathematically solid, non-shaky relativistic quantum field theory (RQFT) so hard?

3 votes

Are Grassmann numbers always "under the hood" if we deal with fermionic ladder / field operators?

0 votes

Functional derivative equalling the Dirac delta function QFT

1 vote
Accepted

How does $U(x,t;x',0) \to \delta(x-x')$ as $t \to 0$ preserve the norm?

3 votes

Formulations of the Wigner function in Quantum Field Theory (QFT in Phase Space)

4 votes

Simple doubt regarding the GNS representation

4 votes
Accepted

Rigorous delta potential – a formulation using distributions?

3 votes
Accepted

How is the Wigner characteristic function defined?

5 votes

Physics interpretation of Sobolev space

4 votes
Accepted

How Translation Operator is defined?

5 votes
Accepted

What is the dynamical $\phi^4_3$ model in quantum field theory and what does it mean intuitively?

1 vote

What is a delta potential?

5 votes

Haag's theorem and causal perturbation theory

10 votes
Accepted

Does every ray in the Hilbert space of a system correspond to one and only one physical state and vice versa?

2 votes

Product of projectors of a observable with continuous spectrum

1 vote

Is every unitary operator induced by a Hamiltonian?

10 votes
Accepted

Uniqueness of bra-ket correspondence

2 votes
Accepted

Is there uniqueness for field-operator and field-momentum operator, if I demand unitary equivalence for the field-operator?

2 votes
Accepted

Is the field-momentum operator ambiguous?

1 vote

Interpretation of density matrix

0 votes

Dimensionality of the quantum space of states

11 votes

Why is an operator the quantum mechanical analogue of an observable?

3 votes

Precise definition of the Hilbert space in QM?

4 votes
Accepted

Non-commutative Fourier transform of an operator

5 votes
Accepted

Why don't the oscillator coherent states disperse in time?

1 vote

How to interpret this construction of the states in QFT?

2 votes
Accepted

What people mean by "state evolving with the interacting/free theory"?

3 votes

What exactly is $\langle x |$?

0 votes

Are quantum mechanical orbits specified uniquely by a Hamiltonian and initial state?

5 votes

Conceptual understanding of operators in QM

1
2 3 4 5
9