Matterwave's latest activity
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Matterwave replied to the thread Undergrad Spatial separation of entangled particles implies physical separability?.Not for the EPR state. It is still an entangled state and not a product state. When EPR says (something like) "after T, the two... -
Matterwave replied to the thread Undergrad Spatial separation of entangled particles implies physical separability?.EPR made an implicit assumption in their argument that indeed you can stop the two particles from interacting with each other...
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Matterwave reacted to bhobba's post in the thread Undergrad Spatial separation of entangled particles implies physical separability? with
Like.
Peter beat me to the punch - he often does o:)o:)o:)o:)o:) Thanks Bill -
Matterwave reacted to PeterDonis's post in the thread Undergrad Spatial separation of entangled particles implies physical separability? with Like.
You do get 2, but you can't split the state up into a product of two states each with a value 1 for the number operator. That's what it...
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Matterwave replied to the thread Undergrad Spatial separation of entangled particles implies physical separability?.Hmmm, what are you counting as a "single excitation" here? If you hit the state with the number operator, you don't get 2?
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Matterwave replied to the thread Undergrad Spatial separation of entangled particles implies physical separability?.Are you reading the EPR paper? It was an implicit assumption of EPR that sufficient spatial separation implies non-interaction. They...
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Matterwave reacted to Paul Colby's post in the thread Graduate Best visualization of SO(3) with Like.
Visualize as a manifold seems to be all you consider. There’s the algebraic aspect of ##SO(3)## as well.
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To me, the best way to visualize ##\text{SO}(3)## is as a rigid body with a fixed point. In particular by examining its motion through...
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Matterwave reacted to anuttarasammyak's post in the thread Graduate Best visualization of SO(3) with Like.
How about Bloch sphere for qubit? Perhaps you want more than that.
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Matterwave replied to the thread Undergrad Transit time for a round trip to Alpha Centuri....Not every calculation is physically meaningful. Consider that a light ray emitted from earth at the same time that the spaceship...
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I know a decent number of properties of SO(3) and obviously I can visualize the group action on three space as rotations. But a good...
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Matterwave replied to the thread Undergrad Transit time for a round trip to Alpha Centuri....How?
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Matterwave reacted to Roberto Pavani's post in the thread Graduate Is this Hessian/spectral viewpoint known? with Like.
Good point. You're right that the step ## A = Q \Lambda Q^T ## requires additional assumptions and does not hold for a completely...
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Matterwave replied to the thread Graduate Is this Hessian/spectral viewpoint known?.This will be the case only when your ##H## is symmetric (assuming it's real). It's true for the Hessian since mixed partials commute...
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Matterwave replied to the thread Graduate Is this Hessian/spectral viewpoint known?.Could you write this out in mathematics / symbols? I'm not sure I am able to parse this into a known thing. One thing your posts...