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| bio | website | |
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| age | ||
| visits | member for | 2 years, 3 months |
| seen | May 14 at 23:05 | |
| stats | profile views | 58 |
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May 7 |
comment |
Positivity in the Pauli/Bloch/coherence vector representation Is your question about whether there is a nice constraint on $\vec{x}$ such that $\rho$ is positive, in the $n$-qubit setting just like in the 1-qubit case? Of course, I don't know of such a constraint and would be very interested to find out. |
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Jan 30 |
awarded | Editor |
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Jan 30 |
revised |
Is it part of special relativity that mass possessing energy is more dense? added 9 characters in body |
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Jan 30 |
answered | Is it part of special relativity that mass possessing energy is more dense? |
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Mar 3 |
comment |
Conservation of energy in quantum teleportation @Peter @Lubos Just wanted a clarification as this would completely answer my question: So, if we have a bipartite Hilbert space, then will the Hamiltonian of the system always be of the form $H_A \otimes H_B$? I suppose the reason for this is that in quantum mechanics the Hilbert space of a quantum system is generated from the eigenvectors of the Hamiltonian (via the Schrodinger equation) and so the Hamiltonians being in the tensor product form is equivalent to the postulate that a combined system has the tensor product structure. |
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Mar 3 |
comment |
Eigenvalue Postulate and Experiment Outcomes in QM That I understand. This was the reason I wrote the line: "eigenvalues can serve the same purpose as the indices". But the eigenvalues carry more information than just an index. That's why I mention the scale information too. So I understand that there is no motivation for quantum information theorists to look at the actual physical value of the outcomes as Lubos pointed out. But as far as quantum mechanics goes, the way the postulate is stated is not complete. That's all I wanted to clarify. |
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Mar 2 |
comment |
Eigenvalue Postulate and Experiment Outcomes in QM So am I right in saying that this is a weaker statement of the general quantum measurement postulate, since it leaves out the part about eigenvalues(which I understand is irrelevant for their purposes)? |
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Mar 2 |
comment |
Eigenvalue Postulate and Experiment Outcomes in QM @MBN, Please see the lines: "While the eigenvalues can serve the same purpose as the indices, they contain more information than just an index: don't they also carry scale information?...." in my question. |
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Mar 2 |
asked | Eigenvalue Postulate and Experiment Outcomes in QM |
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Feb 27 |
awarded | Supporter |
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Feb 26 |
awarded | Teacher |
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Feb 26 |
answered | Free falling of object with no air resistance |
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Feb 26 |
comment |
Conservation of energy in quantum teleportation @Peter Shor, Thanks. It seems to be pretty straightforward. |
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Feb 26 |
awarded | Student |
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Feb 26 |
asked | Conservation of energy in quantum teleportation |
