sábado, febrero 17, 2007

Primera computadora cuántica (comercial)

Pues si... Después de buscar mucho rato, POR FIN! un buen articulo al respecto. (esos imbéciles de slashdot solo son capaces de hacerse publicidad a sus pobres blogs).

Pues bueno, algunos apartes (los que a mi me gustaron) de la entrevista a David Deutsch sacada de aquí

WN: Can you talk a little about the importance of simulating quantum systems, and give an example?

Deutsch: Yes. Whenever we design a complex piece of technology we need to simulate it, either in theory by working out the equations that govern it, or as a computer simulation, by running a program on the computer whose motion mimics that of the real system.

But when we come to designing quantum systems, we're going to have to simulate the behavior of quantum super positions, which is, in Many Universes terms, when an object is doing different things in different universes. On a classical computer you'd have to work out what every single one of those was, and then combine them in the end with the equations governing quantum interference.


WN: For your purposes, the importance of quantum computing is in the general case more than in the specific-use case.

Deutsch: Yes. The fact that the laws of physics permit themselves to be simulated by a quantum computer is a deep fact about the nature of the universe that we will have to understand more deeply in the future.


WN: That's actually D-Wave's stated goal as well: essentially 1,000 qubits in two years. Do you think engineering-wise, and this is not completely within your realm, they will be able to maintain enough coherence at that level to create a practical computer.

Deutsch: As you said that really isn't my field. Maintaining coherence itself isn't quite enough. They've got to maintain coherence in the operation that I spoke of; that is, the arbitrary superposition, the arbitrary entanglement, and so on....

I don't know. The technologies I've seen so far have got way fewer than 1,000. They've got way fewer than 16. I always have to ask whether the claimed number of qubits are qubits that I would count as qubits by these stringent criteria, or whether it's merely two-state systems that can in some sense act in a quantum way. Because that's a much more lenient criterion.

Y si... aquí es cuando uno se llena de escepticismo y espera que se hagan las pertinentes verificaciones que el método científico manda
Sera que si alguna vez la computación cuántica reemplaza la convencional seguirán existiendo los casos de uso?

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