cianfa72's latest activity
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cianfa72 replied to the thread B Time dilation for two clocks at different altitudes on Earth.By static interval I believe you mean the segment of clock's worldline along a part of timelike static congruence. For instance... -
cianfa72 replied to the thread B Time dilation for two clocks at different altitudes on Earth.Exactly, I was referring to what you described (i.e. measuring frequency shift of a predefined frequency signal sent) as the physical...
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cianfa72 reacted to A.T.'s post in the thread B Time dilation for two clocks at different altitudes on Earth with
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Two meetings are required if the clocks are in relative motion at some point. If their arrangement remains static permanently (in some... -
cianfa72 replied to the thread B Time dilation for two clocks at different altitudes on Earth.I'd add that, since the two clocks involved are fixed at two different location A and B, "clock run faster" is not the same as twin...
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cianfa72 reacted to Ibix's post in the thread I How does GR deal with pointlike objects with mass? with Like.
The statement is that you can't tell the difference between being stationary on a planet's surface and being under acceleration in flat...
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cianfa72 replied to the thread I QM Qubit state space representation by Projective Hilbert space.Yes, I know quantum systems' states (pure & mixed) can be represented by density operators acting on abstract Hilbert spaces of relevant...
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cianfa72 replied to the thread I QM Qubit state space representation by Projective Hilbert space.Just to finalize: consider a physical experiment consisting of measuring the spin of 1/2 spin particle along the ##z##-axis. We can...
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cianfa72 reacted to SergejMaterov's post in the thread I QM Qubit state space representation by Projective Hilbert space with Like.
Exactly. All the physics lives on the projective space ##\mathbb C\mathrm P^1## (or Bloch sphere); ##\mathbb C^2## is just a convenient...
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cianfa72 replied to the thread I QM Qubit state space representation by Projective Hilbert space.Ok, so your point is as follows: take the set of qubit's pure states (this is a concrete set, namely the set of qubit's physical pure...
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cianfa72 reacted to SergejMaterov's post in the thread I QM Qubit state space representation by Projective Hilbert space with Like.
Exactly right. You’re drawing the perfect analogy. Point [a:b] in ##\mathbb C\mathrm P^1## isn’t literally the qubit state, but...
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cianfa72 replied to the thread I QM Qubit state space representation by Projective Hilbert space.Yes, picking a basis ##\{ \ket{0} , \ket{1} \}## in the abstract Hilbert space ##\mathcal H## of dimension 2 defines the above...
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cianfa72 replied to the thread I QM Qubit state space representation by Projective Hilbert space.I'd better say: the physical content is in the rays which represent qubit's pure states, however themselves (the rays) are not. Morever...
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cianfa72 reacted to SergejMaterov's post in the thread I QM Qubit state space representation by Projective Hilbert space with Like.
The vectors ∣0⟩ and ∣1⟩ are not cubit states in themselves, but only their representatives. The only physical content is the rays, that...
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cianfa72 replied to the thread I QM Qubit state space representation by Projective Hilbert space.Yes, of course. My doubt concerns symbols like ##\ket{\uparrow}## and ##\ket{\uparrow}##. They aren't qubit's pure states, they actually...
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cianfa72 posted the thread I QM Qubit state space representation by Projective Hilbert space in Quantum Interpretations and Foundations.I'd like to discuss some aspects of quantum systems' state space from a mathematical perspective. Take for a instance a qubit, e.g. a...