Infinite Series vs Integral Representation of State Vectors in QM?
138832
Expansion coefficients of an arbitrary state in the Hilbert space of one-particle states
70390
is there a closed form expression for the following matrix infinite series
87962
Why is $\langle \textbf R \rangle =Tr \rho R$ here $\rho$ is the state density matrix
94896
Deriving a QM expectation value for a square of momentum $\langle p^2 \rangle$
92548
Creating an arbitrary state of the quantum simple harmonic oscillator
59021
What is the most general expression for the coordinate representation of momentum operator?
94717
Systems in quantum mechanics solved by ladder operator method
84649
Why is the application of probability in QM fundamentally different from application of probability in other areas?
104140
Value of momentum of a particle in 1D box prepared in a particular state?
34021
What is the physical meaning of a "complete" Hilbert space in QM?
78075
Why can I apply $HS^\dagger$ and then measure in the computational basis to measure $Y$?
36407
Is *every* planar/2D system integrable?
63304
The Dirac-delta function as an initial state for the quantum free particle
156423
Partition function containing QM?
154772
The Momentum Operator in QM
14166
Hilbert space of harmonic oscillator: Countable vs uncountable?
28062
Something special about energy eigenstates when it comes to time evolution?