Density of states, $\pi$ vs $2\pi$
37120
Frequencies of a standing EM wave in a box (Schwartz QFT)
41470
Is the density operator a mathematical convenience or a 'fundamental' aspect of quantum mechanics?
52755
Rewriting the probability density function as a probability function
113275
How to find the reduced density matrix of a four-qubit system?
71539
The average of inverse square radius $r^{-2}$ for any state quantum $|n\ell\rangle$ using the radial Schrödinger equation
58224
BH singularity? Infinite density
128932
Is my expansion of the state $| x \rangle$ correct?
156467
Does $\langle\Omega|\mathrm{e}^{\mathrm{i}Px}=\langle\Omega|\mathrm{e}^{\mathrm{i}0x}$? $(\langle\Omega| =$ ground state of the interacting theory)
81178
Why are the two outer charge densities on a system of parallel charged plates identical?
54549
How do I compute the density of R?
12433
How do $\pi^0$ particles exist?
57592
Does existence of $\gcd$ implies PID?
51845
PDF of $Y = \cos(\pi X)$
31382
Units of Gaussian integers
2786
The staircase paradox, or why $\pi\ne4$
22842
The Interpretation of $|\psi|^2$ and the No-Clone Theorem
105973
how do we know the BBP formula for $\pi$ is valid?