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 Feb 3 awarded Excavator Feb 3 revised quantum entanglement at microwave frequencies improved quality of the answer Feb 3 suggested approved edit on quantum entanglement at microwave frequencies Aug 22 comment How is the hamiltonian a hermitian operator? Are you sure that this proves that $ih\frac{d}{dt}$ is Hermitian? I know that the Hamiltonian can be pseudo-hermitian and $H=ih\frac{d}{dt}$ is still valid from Schrodinger equation. Nov 21 comment Glueball mass in non-abelian Yang Mills theory Cause I'm studying these things and there are not clear references... why? Nov 20 asked Glueball mass in non-abelian Yang Mills theory Nov 15 awarded Scholar Nov 15 accepted Yang Mills Hamiltonian: why do we use the Weyl's temporal gauge? Nov 15 awarded Student Nov 15 asked Yang Mills Hamiltonian: why do we use the Weyl's temporal gauge? Nov 14 awarded Citizen Patrol Nov 12 comment Classical Communication in Quantum Teleportation @Ondřej Černotík So you are telling that if I want to teleport an input qubit, classical communication can be implemented also sending a qubit, provided that Bob measures it in the right basis. So why in this case Alice should not send directly her input qubit to Bob? Nov 12 comment Classical Communication in Quantum Teleportation @Ondřej Černotík So classical does not mean that you are not sending superposition (because in your case you are sending superposition), but it means that Alice communicates to Bob in a common language (in your example the choice of the basis). Isn't it? Nov 12 comment Classical Communication in Quantum Teleportation @Ondřej Černotík The fact that a photon is a vertical or horizontal polarization it depends strongly from which basis you are measuring: $|H\rangle=\frac{|H\rangle+|V\rangle}{2}+\frac{|H\rangle-|V\rangle}{2}$, and changing basis you get $\frac{|phi\rangle+|\phi^\bot}{\sqrt{2}}$. So what are you telling depends strongly from an universal protocol that Alice and Bob knows, e.g., in your case, in which basis you have to measure to retrieve the information that Alice wants to send to Bob. Nov 12 comment Classical Communication in Quantum Teleportation I will try to go deeper in the question thanks to these comments. When you are sending 0 or 1 from Alice to Bob, in practice Alice is sending an electromagnetic field (used in standard communication), which is converted to a number by Bob using universal protocols (the one in our computers for instance). In this picture, what is the classical feature? The fact that we are sending a classical electromagnetic field? If yes, what if we send something that is not clear if it is classical or not classical? Nov 12 revised Where is noncommutativity in the state-effect formalism of quantum mechanics? deleted 4 characters in body Nov 11 awarded Supporter Nov 11 revised Does uncertainty imply noncommutativity? added 4 characters in body Nov 11 revised Is the density operator a mathematical convenience or a 'fundamental' aspect of quantum mechanics? added 2 characters in body Nov 11 revised Why do they call it quantum teleportation? added 1 characters in body