network profile
| bio | website | |
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| location | ||
| age | ||
| visits | member for | 7 months |
| seen | Mar 19 at 14:46 | |
| stats | profile views | 11 |
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Nov 21 |
comment |
Glueball mass in non-abelian Yang Mills theory Cause I'm studying these things and there are not clear references... why? |
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Nov 20 |
asked | Glueball mass in non-abelian Yang Mills theory |
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Nov 15 |
awarded | Scholar |
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Nov 15 |
accepted | Yang Mills Hamiltonian |
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Nov 15 |
awarded | Student |
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Nov 15 |
asked | Yang Mills Hamiltonian |
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Nov 14 |
awarded | Citizen Patrol |
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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? |
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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? |
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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. |
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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? |
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Nov 12 |
revised |
Where is noncommutativity in the state-effect formalism of quantum mechanics? deleted 4 characters in body |
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Nov 11 |
awarded | Supporter |
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Nov 11 |
revised |
Does uncertainty imply noncommutativity? added 4 characters in body |
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Nov 11 |
revised |
Is the density operator a mathematical convenience or a 'fundamental' aspect of quantum mechanics? added 2 characters in body |
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Nov 11 |
revised |
Why do they call it quantum teleportation? added 1 characters in body |
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Nov 11 |
revised |
Classical Communication in Quantum Teleportation added 8 characters in body |
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Nov 11 |
answered | Why do they call it quantum teleportation? |
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Nov 11 |
asked | Classical Communication in Quantum Teleportation |
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Nov 11 |
comment |
Where is noncommutativity in the state-effect formalism of quantum mechanics? Let assume that your measurement device is not disturbing our system. In this case measuring $A$ and then $B$ is not the same as measuring first $B$ and then $A$. Mathematically because the two observable does not commute. Physically because if you make experiment, effectively you will get different results in some case. If your problem is that the experimental device is disturbing the system, in many cases you can design a scheme to implement a measurement without disturbing this. These kind of measures are called Quantum Nondemolition Measurement. |
