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w0000t | 10 years ago | on: Announcing the D-Wave 2X Quantum Computer

http://www.dwavesys.com/press-releases/d-wave-systems-breaks...

This announcement, claims:

Every additional qubit doubles the search space of the processor. At 1000 qubits, the new processor considers 2^1000 possibilities simultaneously, a search space which dwarfs the 2^512 possibilities available to the 512-qubit D-Wave Two.

Since we still aren't able to factor any large numbers with it, those 2^1000 bits don't really work like they say they do. I'm guessing there are many caveats behind their description.

I would appreciate any explanation from an expert.

w0000t | 10 years ago | on: Errors and Exceptions

The problem is it needs to be applied to every function that returns a value. And I'm pretty sure you can't apply it to C library functions. Gcc seriously needs a global flag for this.

w0000t | 10 years ago | on: A visual proof that neural nets can compute any function

You missed this paragraph, which occurs in the first 10% of the article.

The second caveat is that the class of functions which can be approximated in the way described are the continuous functions. If a function is discontinuous, i.e., makes sudden, sharp jumps, then it won't in general be possible to approximate using a neural net.

w0000t | 10 years ago | on: The Strange Appeal of Watching Coders Code

That is a pretty naive point of view. That amount of know-how, and I'm assuming he knows much more that has presented, is normal for someone who has been programming for 15+ years straight.

If you find yourself still seriously programming after a few years, try evaluating this position then.

w0000t | 10 years ago | on: Warp speed travel is theoretically possible, says astrophysicist

You are clinging to light cones because that is what you know about relativity, but you don't understand it intuitively. I didn't get any new information from you last comment, just what has already been said. Warp and light cones clearly don't work. Does that mean that warp couldn't work at least in theory, no.

Learn more about relativity( it is really interesting ), otherwise you will always be stuck in your frame of mind.

w0000t | 10 years ago | on: Alibi Routing

Does it matter to avoid USA if someone is taping into the cable in a different country.

w0000t | 10 years ago | on: Warp speed travel is theoretically possible, says astrophysicist

The light cone only matters if you actually move. The accepted idioms from relativity don't apply here.

I think we are just not talking about the same "warp" drive. The version that doesn't violate causality works like this. You are not allowed to accelerate( using normal rockets ) to near c velocity and then warp to a stop to some distant location. This would cause problems. Instead you will end up there with all of your accumulated velocity before the warp. Then you have to come to a stop the same way you accelerated.

In other words, warp will change your location but not your velocity in spacetime.

w0000t | 10 years ago | on: Warp speed travel is theoretically possible, says astrophysicist

You assume that warp drive actually moves you trough space, it doesn't. Problem solved.

Here is a practical example: I decide to travel to Alpha Centauri, and I'm there. Time passed for everybody is the same. You cannot cause any problems.

Note that you are not allowed to change reference frames, by doing this. This does sound illogical, since you move to some other location, but if you assume you didn't move, like we did, then it isn't. Actually the space moved, and that might cause some other problems we don't know about.

w0000t | 10 years ago | on: Warp speed travel is theoretically possible, says astrophysicist

I was referring to sub c speeds and what happens by using real confirmed physics. I didn't realize you were talking about warp drives in that case.

As far as I understand from popular science, warp drive doesn't actually move the occupants of the vehicle, it moves the space around the ship so in that case there is no time dilation. It takes the same amount of time for people, in and outside, the ship. If your warp drive is limited to 20c then yes it is a problem, but I don't see why would it have to be limited in the first place. Make it go 10^10c and the problem is solved.

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