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seen Dec 10 at 4:07

Dec
6
comment What does high-pressure ice look like?
Thanks. Wasn't using the right search terms, apparently. Feel free to close this one down if you want.
Dec
6
awarded  Student
Dec
6
asked What does high-pressure ice look like?
Nov
20
comment Will free-fall object into black hole exceed speed of light $c$ before hitting black hole surface?
@Ron Maimon: So if they don't "actually" slow down, does that mean they even pass the horizon? If so, at what speed are they going then?
Nov
18
comment How long would it take to travel through a wormhole?
Do you have a citation on the objection from information loss?
Nov
12
comment Is the universe linear? If so, why?
Let us continue this discussion in chat.
Nov
12
comment Is the universe linear? If so, why?
(Although, it looks likely that quantum computers will be realized, as all the laws of quantum mechanics which suggest their possibility have been tested vigorously through other means, and more and more breakthroughs and improvements keep on coming.)
Nov
12
awarded  Commentator
Nov
12
comment Is the universe linear? If so, why?
That is, it is possible just as much as how it is consistent with the laws of the universe that one can make a starship which can travel at 99.9999% of light speed, although it would be infeasible to actually build such a thing.
Nov
12
comment Is the universe linear? If so, why?
Also, what is "real" quantum computation? Does this mean a quantum computer has to be practical, or just theoretically possible? E.g. what if it is infeasible to build a quantum computer with any more than a small number of qubits for whatever reason, yet still possible in theory?
Nov
12
comment Is the universe linear? If so, why?
@Ron Maimon: And if it does have a "classical" base but requires a crazy amount of bits, what's the problem? All that would seem to mean is that we could not use the "classical" base theory to simulate very much of the universe.
Nov
10
comment Is the universe linear? If so, why?
If "no", then a failure to harness it would not falsify the theory.
Nov
10
comment Is the universe linear? If so, why?
Why is it that "quantum computation" is the make-or-break question as to whether or not quantum mechanics is the fundamental theory? Is that the only remaining unverified prediction of quantum theory? Isn't it always possible (as nothing in science is certain) that that prediction could succeed, yet another one may fail? Also, isn't all of the overwhelming amount of experimental testing that quantum theory has received enough to place a great deal of confidence in it? Also, does quantum theory predict that quantum computation must be harnessable?
Jun
14
comment If the graph isomorphism problem can't be solved in polynomial time, do spin-networks in loop quantum gravity violate the Church-Turing thesis?
But could it be possible that the loop quantum gravity would allow for, if not the construction of a computer going beyond the Turing machine, then for the construction of one which could solve "NP-complete" problems in polynomial time through quantum-gravitational "computation"? Such a machine would obviously be of tremendous import in and of itself, of course.
Apr
24
awarded  Supporter
Sep
11
comment What is the next step beyond quantum computation?
Wouldn't there be an intermediate step between quantum computers and trans-Turing computation, namely the ability to build a machine efficiency-equivalent to a non-deterministic Turing Machine, thereby enabling the solution of NP-Complete problems in P-Time?
Sep
5
comment Why Counterclockwise starts from East?
I'm amazed as to how many factoids you must've memorized about all these things.
Oct
22
awarded  Teacher
Oct
22
answered Why does an infrared thermometer display very low temperature when being directed to the outer air?