Comments on: Hauling Out the Quantum Frigidaire: Can Quantum Mechanics Suck the Heat From Computing?

By: acuvue oasys rebate

acuvue oasys rebate — Tue, 26 Jul 2011 22:42:26 +0000

That is highly imformative. I appreciate you all the information.

By: harshj

harshj — Sat, 09 Jul 2011 12:02:53 +0000

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By: azbearhuntr

azbearhuntr — Tue, 07 Jun 2011 20:11:55 +0000

My thighs are burning without a laptop, is that a problem?

By: nate

nate — Sat, 04 Jun 2011 14:31:16 +0000

“where a bit of information processed must cause a corresponding rise in temperature” -This is true, but it would be more accurate to say that ‘a bit of information ERASED must cause a corresponding rise in temperature”. Landauer showed that this was the only irreversible act in the process of computing, so its the only action that requires the generation of heat.

By: Andy Galinsky

Andy Galinsky — Fri, 03 Jun 2011 15:07:49 +0000

Cooling could be accomplished by computing – calculating the entry of energy into a substance out of phase to cool on a molecular level.

It will take energy to cool the target molecule by molecule – still a net transfer of energy. This just brings up more questions of net cooling and where out of phase energy actually goes…just like introducing out of phase light into a room to make it dark…

This article, however actually sucked the intelligence out of me – thus leaving me dumber than before I read it.

By: Torbjörn Larsson, OM

Torbjörn Larsson, OM — Thu, 02 Jun 2011 21:50:24 +0000

I doubt this after reading the arxiv paper. The trick is to run the usual erasure in reverse (fig 3 vs fig 2). But the sleight of hand is to claim that the preparation of the pure state in fig 3 is different from the one in fig 2, which is precisely the one step that can’t be done in isolation.

How can the preparation be different? The authors seem to suppose they can prepare states lossless. (In effect, have an infinite supply of them.) But state preparation and how to erasure it is what the whole process is about in the first place.