Some interesting work with q-bits

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Please have a look at
http://physicsworld.com/cws/article/news/47101

Calcium ions are used to simulate other quantum q-bit systems.

ruveyn

bad time, just skimmed it.

definately interesting, but this rings more of an actual "(pseudo)direct physical simluation" than computation.

It is the management of the q-bits that is the question this time. With decoherence the system fails.

ruveyn

Cool. Another step in the building of a *real* quantum computer!

As ruveyn said, quantum coherence is a big problem with systems like this and considering that even in a vacuum particles are popping in and out of existence therefore interacting with the qbits. It will be unlikely that we will see systems like this out of the lab.

True vacuums are impossible. It's possible the next step in qbit computers will have to do with "resetting" the system, a sort of error correction. If the rate of failure is known, it can be compensated for and the system reset. Maybe?

I can see the best use for q computers at the moment is calculating the state of reality itself. Even the errors would provide useful data on how the physical world interacts with itself.

had time to do some more reading and the thread poped up again.

true the real test is how well cohesion is maintained.
though to my knowledge even in a true vacuum there would still be subatomic particles popping in and out of existence.

how sensitive would it actually be to this kind of noise?
as i undertand it, it is a cumulative effect over time and as such a "hardcoded" reset might be a solution, new clock standard? operations per cycle * cycles a second, it could limit very long calculations.