Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror
Technology

Another Step In Quantum Computing: A Functional Interconnect 43

New submitter Gennerik writes: According to a recent article in the MIT Technology Review, a team of international physicists have been able to create a quantum computing interconnect. The interconnect, which is used to connect separate silicon photonic chips, has the important feature of preserving entanglement. This marks a vital step in creating quantum computers that don't have to work in isolation. According to the article, the trick that The trick that [University of Bristol Researcher Mark Thomson] and pals have perfected is to convert the path-entanglement into a different kind of entanglement, in this case involving polarization. They do this by allowing the path-entangled photons to interfere with newly created photons in a way that causes them to become polarized. This also entangles the newly created photons, which pass into the optical fiber and travel to the second silicon photonic chip.

Comment Re:"Metric" tons? (Score 1) 121

I'd like to see your reference for this statement "A ton is and has always been metric".

As I understand it a "ton" is typically non-metric (either Imperial or US) whereas "tonne" is metric and "metric ton" is the term typically used in the US that refers to tonne. This has been my understanding for years but a quick check on Wikipedia (http://en.wikipedia.org/wiki/Ton and http://en.wikipedia.org/wiki/T...) seems to agree, although I notice there is some confusion when talking about an Imperial ton (or long ton) and a tonne as they are very similar mass and therefore "ton" has been used interchangeably for both.

I am curious which country you are from and if you are familiar with the non-metric terms for mass.

Comment Re:Useless (Score 1) 100

So just to be clear... "Well it's better than nothing (so better than Canada)" are you saying that Canadians cannot unlock their phones? If so then either you or I need to update our information because as I understand it we can now request our phone be unlocked after 90 days (in contract) or immediately if you purchase the phone outright. Of course there can be a charge for getting the phone unlocked, unfortunately.
http://www.crtc.gc.ca/eng/info...

Comment Re:TFA Says Patch is Fixed (Score 2) 136

Yes, except... if your machine still has updates outstanding then from what we have seen it is best if you "check for updates" again before installing them. It looks like if the patch was already downloaded then it will install unless you refresh by checking for updates again before installing.

Comment Re:oh you motherf~}NO_CARRIER (Score 4, Informative) 136

After some investigation it looks like the update may not have been configured to do a silent install properly and actually hangs as it is waiting for user input on an invisible dialogue box.

If you have a machine that does hang we have found the following:
1. wait until there is virtually no disk activity (counting on you have a light that shows you) and then power the machine down, or
2. use either PowerShell remoting or psexec to kill the two processes involved in the update: "Setup" and "vstor_redist".
With PowerShell: Invoke-Command -ComputerName hostname -ScriptBlock {Stop-Process -Name Setup,vstor_redist -Force}
With PSExec something like this will work:
Psexec \\hostname cmd
Taskkill /im Setup /f
Taskkill /im vstor_redist /f
Exit

If the machine is doing a number of updates killing the two processes above will allow the machine to continue with the rest of the updates.

Of course the standard disclaimers apply: No guarantees the above will help and not harm you computer, your mileage may vary, batteries not included, objects in code are buggier than they appear, yadda, yadda.

Comment Re:Catastrophism (Score 1) 71

I have to say I miss Hogan also. My wife and I have also read most of Hogan's books and thoroughly enjoyed them. We are currently introducing our youngest to Hogan by reading Code of the Lifemaker as a family. His writing was not as good near the end and in all he did not publish near enough for my liking. I've yet to find a similar author to replace him in my library. If you have any suggestions I'd be interested in hearing them.

That all said, I had not heard of Velikovsky or John Ackerman... will have to check them out.

Comment Re:Very interesting (Score 1) 72

You quickly come to understand that Goodwill is a for profit business operating under a false tax documents by making a pittance of over publicized donations each year.

Awhile back one of my mom's friends said this when I was looking for a place to dumb left-over stuff from moving, so I did a bit of research. This is true, sometimes. Each region is run seperately and independently, so this might be true where you live, but not where I live. Some regions are horribly corrupt, with the executives basically getting rich off of the the mentally disabled and the court systems... While some regions are actually trying to help people.

I personally prefer the Mormon run Deseret Industries... Their stores are very clean, everything is washed, and they don't try to sell all the actually good items at online auctions, meaning you can still discover some good items. Once the one near me had a ton of awesome vintage camera gear, cheap; where Goodwill sells absolute crap since all the good stuff has been long-since syphoned off by staff, or stuck on their circa 1995 auction website.

Comment Re:45 years ago... (Score 1) 283

I grew up on TNG, though I watched a ton of TOS thanks to reruns as a kid.

Recently, when Netflix made them all streaming I rewatched both of them again in pretty much a marathon. TNG didn't age well, and get bit boring in the end. TOS was fun to watch. Even my girlfriend (not a nerd, no experience with ST) had a blast with TOS. TNG was a better show, and better written, but TOS is just plain fun. TNG didn't age well thanks to its special effects and long form plots. TOS has Kirk kirking things with his fist, awesome music, cool rubber costumes, and green chicks in go-go boots...

TOS goes with beer and chips better than TNG or anything subsequent.

I didn't couldn't really stomach rewatching DS9 or Voyager, I didn't like them when they were on the air, and like them a bit less now. DS9 would have been okay, except it starts so damn slow, and has far to much Warfling and Ciscoling to really be watchable. At least Wesley Crusher was so bad he was kind of amusing (at least 20 years later). And Voyager is just pants, and killed Trek for me for good.

Comment Re:appearing to have free will (Score 1) 401

You seem to completely disregard that the actual configuration of matter has both an effect on the system it is considered to be part of and on the environment the system is said to be in.

I don't see away to carve out the possibility of individual choice from this though. No matter how many layers or systems you have, or how chaotic they are, allows for something "outside" out their own base rules. Even in a probabilistic system, like QM, there isn't room to get outside of its own base elements, you might obfuscate it, and make first causes irreducible from complexity, chaos, and random events, but it still wouldn't be "free". I phrased that very badly, but language gets annoying with concepts like this.

I might be missing your point (not enough coffee this morning)... If I did, I apologize. I always view these things as "abstraction layers", with them being increasingly removed from the innate human perception frame as we go "down" or "up", there really isn't a difference between quantum mechanics and humans, but we can't see it because of our evolutionary context shaping our perceptions.

Comment Re:Sam Harris (Score 1) 401

You would essentially have to think your thoughts before you think them and then choose.

I don't see why this would be strictly necessary. If free-will was a emergent process it would exist in the act of thinking, and not necessarily prior to the action of thinking. The transitory act of thinking itself is being. Further, requiring the act of "pre-thinking" would be a bit odd, since it would imply that we must be psychic to have agency. The whole idea is set up to create a reductio, so someone can say "well, obviously".

That said, I rather doubt that free-will exists, as such. But I also don't think that it matters either way; there is no way to "act as if you had no free will" (the very statement is meaningless, as it implies a decision, which implies agency), making the whole argument a bit moot. A lack of agency would also be meaningless to society, because the mere knowledge of this lack doesn't lead to knowledge of why actions are taken. Prisons would exist, punishment would exist, there really isn't a reason they shouldn't since we can never actually trace the action back to first principles... Human behavior probably results from a hugely complex, and almost completely irreducible, chaotic systems. A murder might be the result of millions of factors, from genetics and upbringing, to global history and sociology, to quantum fluctuations at a cellular level and the current weather... Things are no less mysterious if we remove free-will from the equation... Or rather, things are generally as meaningless.

Comment Re:appearing to have free will (Score 2) 401

... not having a basic understanding of modern philosophy?

Its been awhile since I was in school (for philosophy), or reading up on the current discussion, but as far as I know this is still a massive debate, with very little, if any, agreement between philosophers (or psychologists, or neurologists, or cognitive scientists, or programmers, or physicists, or whoever else's feild this topic touches).

That said, there is a large debate on whether there is a difference between agency as a thing, and the perception of agency. Go read up on Searle's Chinese Room, and the debate it has sparked (especially Dennett). Also read up on the whole thought-experiment of "p-zombies", which explores this very concept.

AFAICT there isn't a consensus on this topic at all.

I take a more existential stance on it; where it doesn't really matter since one can't live as if one doesn't have agency, so on a human level the debate doesn't matter either way, since agency is a necessary trait to existence.

    Ontically, though, I'm pretty sure agency is a dead horse unless we find something wrong with modern science. You can stretch things a bit (ala Dennett, again) by tying agency into the quantum realm, but you really just push the debate back a bit; is random, yet probabilistic, much better than classically deterministic? Neither leave room for an actual "you" driving you, barring theology and a Cartesian bag of worms. If humans are purely matter, and that matter follows the same laws as all other matter then agency is impossible. If we have something immune from the normal laws of physics, then how are we to ever prove this fact, and further how does this "spiritual matter" (or whatever) influence "actual matter"?

Slashdot Top Deals

Regarding astral projection, Woody Allen once wrote, "This is not a bad way to travel, although there is usually a half-hour wait for luggage."

Working...