Calculating a matrix element, $\langle x|p\rangle$?
58445
What does the Canonical Commutation Relation (CCR) tell me about the overlap between Position and Momentum bases?
71105
How is Grover's operator represented as a rotation matrix?
103870
$3.\lim_{n\to\infty}\langle x,e_n\rangle=?$
122603
How does $\mathcal E(\rho)=\mathrm{Tr}_{env}[U(\rho\otimes\rho_{env})U^\dagger]$ turn into $P_0\rho P_0+P_1\rho P_1$?
24416
What is the cleverest way to calculate $[\hat{a}^{M},\hat{a}^{\dagger N}]$ when $[\hat{a},\hat{a}^{\dagger}]=1$?
127047
How to show that $\sum_{i=1}^n | \langle f, f_i\rangle |^2 \leq \Vert f \Vert^2$
44843
What is the difference between $|0\rangle $ and $0$?
29174
Trouble with operator-sum representation of a quantum operation
2626
Show $\langle a^m \rangle \cap \langle a^n \rangle = \langle a^{\operatorname{lcm}(m, n)}\rangle$
39080
What is the spectrum of $\hat x \hat p + \hat p \hat x$?
25335
Orthogonal matrix over cross product
57166
Showing that $\Bbb R[x] / \langle x^2 + 1 \rangle$ is isomorphic to $\Bbb C$ question
1906
Multiplying by a $1\times 1$ matrix?
128710
Prove that $\langle a^n \rangle \bigcap \langle a^k \rangle = \langle a^{lcm (n,k)} \rangle$
96
How to interpret a quantum circuit as a matrix?
71187
How to prove $\hat{p}|x\rangle=i\hbar\frac{\partial}{\partial x}|x\rangle$,using $[\hat{x},\hat{p}]=i\hbar$?
151721
Uhlmann's Theorem: proof of $\text{tr}(A^{\dagger} B) = \langle m | A \otimes B |m\rangle $