Qbits unstable: May Limit Quantum Computing

museumpeace writes "Netherlands Organiztion for Scientific Research provies a human-readable description of research into the stability of Qbits conducted at Leiden University. The bad news: " Much to their surprise they discovered that the coherence tends to spontaneously disappear, even without external influences." The whole story in physicist-readable form is in the June 17 Physical Review Letters by van Wezel, van den Brink, Zaanen [click abstract or huge PDF]. I am not buying any quantum computing startups 'til they nail this matter down...you can't build a computer if state information is going to evaportate in a second or less."

Comments

Nonsense.

[FooAtWFU]

I'm running on a quantum computer right now, and I've not experienced and problems with any instacpqHeIkHBciBhAw 1uU6T1EK22qB9BBhokmNK6Ddv8CzpsgSEm HWn0CQEzPkDZJijN66jc/yy9Z3DBPguo1IqgWpSPMnqXAz4c8W f+2AVHipQWAsqw7QMZ7RO5k6Rr03cSM8d3uM+KdRTBV/q

++ATH
NO CARRIER

Re:Nonsense.

[idontgno]

root@heisenberg # uname -a
Quantos heisenberg 2 6
root@heisenberg # uptime

uncertainty violation at 0x43c4df30
kernel panic dumping core

Re:Nonsense.

[Tablizer]

I'm running on a quantum computer right now, and I've not experienced and problems with any instacpqHeIkHBciBhAw uU6T1EK22qB9BBhokmNK6Ddv8Czps gSEm HWn0CQEzPkDZJijN66jc/yy9Z3D

You solved it! That is the missing Perl reg-ex code for my masterpeice OS-in-a-wrist-watch! I'm complete now! Thank You Thank You!

TFA says it's related to the size of the qubit

[bornyesterday]

Solution: get more cats.

No big deal

[zappepcs]

Didn't the Pentium have this problem too?

3 - 2 = 1.99999999999

sounds like something MS windows can deal with? :-)

Not necessarily

[stienman]

you can't build a computer if state information is going to evaportate in a second or less.

If your quantum computer can calculate what you need to know within that period of time and still have time left over to read out the state, then I don't care how fast it evaporates.

I'll still get the cryptokey.

Of course, if it's proven that each time you create one it actually forms a micro universe of living creatures and progresses it millions of years before you kill it through apparant neglect, then you're going to have a problem with religious people.

But you'd still have the key.

Alternately, you'd have still gotten the message you set the secure channel up for.

-Adam

explanation

[hoggoth]

> the coherence tends to spontaneously disappear, even without external influences.

without external influences... from *OUR* universe... (eerie zither music ensues...)

( Zorg: Let's mess with their Qbits again.. hee hee)
( P'teem: Har!Har! Zorg! I never get tired of screwing up lesser beings!)

Evaporation

[masterzora]

you can't build a computer if state information is going to evaportate in a second or less. Why not? We Windows users are used to it...

I used to play with Qbits when I was a kid

[NTT]

I always did wonder about the stability of the purple fuzzy guy... I mean how did you know which way was up? Left actually went up and left meanwhile right went up and right and so on. Not to mention that nerve-racking sound when the springy green snake thingy grabbed him was awful. No wonder he is unstable. I would be too.

Wait... did I read that right???

Noah's Arq...

[CptNerd]

If they ever build a quantum grid computer, they should make it 300 qbits long, 50 qbits wide, and 30 qbits high...