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1h
answered Why when we have GHZ, then we cannot send a qubit using teleportation technique?
2d
comment measurement of tripartit qubit state
I don't understand your question. Are you talking about a quantum state made up of three qubits shared amongst three parties? Then where have the 001, 010, and 011 states gone? Why are you applying a schmidt decomposition, given that it only applies to states shared amongst two parties? What constraints are preventing you from just measuring a bunch of copies of the state to learn a, b, c, d, and e via tomography?
Jan
29
comment The second law of thermodynamics and life on Earth
A person tidying their room may feel like they're making the universe more orderly, but the high-entropy waste heat given off by their body tells a different story. Any "order" created by humans is far outweighed by the amount of neg-entropy we burn to do so. There are accessible explanations of this concept on the internet, such as this blog post, which might help you understand. But if you want to really understand, that involves learning physics and doing the math.
Jan
29
awarded  Popular Question
Jan
25
comment How does flying over synchronize clocks look like?
Caution: the quoted question is asking about the state of the clocks at a particular time in your frame of reference, not what they would look like as you passed over and light from them entered your eye. For an intuitive idea of how those differ, you can try velocity raptor and toggle between "seen" and "measured" mode.
Jan
25
answered Does quantum entangled particle release energy when its “twin” is measured?
Jan
22
comment What is “mass” in particle physics?
@joshphysics that's much closer to what I have in mind, in terms of being a duplicate question.
Jan
22
comment Quantum computing with biological matter?
Related: Seth Lloyd on Quantum Life (on life using quantum effects, e.g. photosynthesis using a quantum walk). And this talk is 100X better than that TED talk about the same thing.
Jan
21
awarded  Nice Question
Jan
21
awarded  Yearling
Jan
21
revised What is “mass” in particle physics?
added 84 characters in body
Jan
21
comment What is “mass” in particle physics?
@ACuriousMind I found that before asking my question, read it, and didn't feel like I had an answer. It's definitely close. I think the difference is I want an answer that says why "the 'mass term' in the Lagrangian or Hamiltonian" is what we identify with mass, as opposed to just being told that in passing. I also gave several specific sub-questions which clearly don't line up with the question you linked, like "why is the 'bouncing' Lorentz invariant?" with the goal of prompting that kind of "how"/"why" answer.
Jan
21
asked What is “mass” in particle physics?
Jan
18
awarded  Critic
Jan
17
comment Can Quantum Measurement Be Detected After The Fact?
@xendi The one talking about one path going clockwise around the galaxy, the other going counter-clockwise, and they meet on the other side? They're just talking about whether or not coherence can survive long distances, long times, and long travel through not-quite-empty space without protection. The beams still have to come back together to see any interference.
Jan
14
accepted Approximate cloning of a qubit, given multiple starting copies
Jan
14
revised Approximate cloning of a qubit, given multiple starting copies
added 10 characters in body
Jan
14
revised Approximate cloning of a qubit, given multiple starting copies
added 10 characters in body
Jan
14
revised Approximate cloning of a qubit, given multiple starting copies
added 88 characters in body
Jan
14
revised Approximate cloning of a qubit, given multiple starting copies
added 6 characters in body