In Stinespring dilation, can we always use a mixed state as the ancilla?
62076
Can any channel be written as $\Phi(X)=\operatorname{Tr}_{\mathcal Z}[U(X\otimes \sigma)U^\dagger]$ for any state $\sigma$?
36574
Does separation of variables in PDEs give a general solution?
144152
Shaping negative pulses to positive ones
66689
Delayed choice entanglement swapping: why are Alice & Bob's measurements useless without Victor's?
41889
Why is the $S_{z} =0$ state forbidden for photons?
51208
Is the wave function of a particle re-created after a measurement stops?
155316
Are two waves out of phase only when the phase difference is $\pi$?
108464
Necessary and sufficient conditions for a function to be the Wigner function of state
53640
Equality of mixed partial derivatives
139548
Cycles mixed material
26959
Why doesn't the uncertainty principle contradict the existence of definite-angular momentum states?
82869
Should it be obvious that independent quantum states are composed by taking the tensor product?
20166
Can a single metaphor be 'mixed'?
118273
Intuition - why does the period not depend on the amplitude in a pendulum?
51736
When is a quantum state stationary?
42765
Stimulated emission and No cloning theorem
36380
Why not use the Lagrangian, instead of the Hamiltonian, in nonrelativistic QM?