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I'm a mathematical physicist in training working primarily on questions concerning quantum information and general quantum mechanics.


4h
reviewed Reviewed Why do high current conductors heat up a lot more than high voltage conductors?
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comment Why do high current conductors heat up a lot more than high voltage conductors?
-1: Either this is usual electrical engineering lingo or it is just nonsense. "Amps" and "Volts" are units, not things, so they can't do anything and I can't see the physics here.
4h
comment Methods to distinguish between pure/mixed states and entangled/separable states
Regarding your actual problem, I still don't really see why this should be true at all. Maybe you want $\tau$ to act on both systems?
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comment Methods to distinguish between pure/mixed states and entangled/separable states
@Wooster: It should be possible to find a way. I actually think that if you leave out the Schmidt decomposition, you could probably do the same calculation with a bit more effort in the exact same way (you'd probably have to choose your basis in a different way such that you know what it means for your state to be pure in the first place), but it's really not worth much to think about it. The Schmidt decomposition is really simple, it's basically just the singular value decomposition in disguise - nothing more!
4h
answered What is the definition of a qubit and a copy/clone of a qubit?
10h
reviewed Approve How to increase flow rate?
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answered Methods to distinguish between pure/mixed states and entangled/separable states
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comment Methods to distinguish between pure/mixed states and entangled/separable states
Saw this, and deleted the comment! Sorry for misunderstanding.
14h
reviewed Leave Open Approximating energy loss caused by drag force
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reviewed Leave Open Would an undersea reverse osmosis station work?
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reviewed Close Show that a solenoidal field is always a curl of a vector field
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reviewed Close Integrating entropy on an arbitrary boundary
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reviewed Close Is it possible to cut the contents of an atom? (theoretical question)
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reviewed Close Is it possible to travel ONLY through Time and not Space?
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reviewed Close how to define infinite/finite systems in nature?
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reviewed Leave Open Optics modelling software
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reviewed Leave Open In Gauss's law, why do we use an infinte long wire or long plane to calculate electric field intensity?
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reviewed Close Digital colors: why RGB instead of RYG?
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reviewed Close Thermodynamics - Gas Laws
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reviewed Leave Open Zero volume at zero Kelvin