To: Ian@SI who wrote (5593 ) 5/28/1998 12:24:00 PM From: HB Read Replies (3) | Respond to of 10921
Re quantum computing: my research is in the theory of this stuff (mostly in the related theory of quantum information). (I am way over in the theoretical wing of things, so my knowledge doesn't have any application to semi equipment.) Maybe not practical in your investing lifetime, since we are at the stage of having max 4 bits of computer right now, in implementations that are hard to figure out how to scale up beyond about 10 bits. However, I think someone... maybe it'll be Kane... will figure out how to make scalable gate systems in some kind of solid state implemenation, and then we might be surprised at how fast they are developed. We are at the stage where it is hard to imagine rapid progress with the current implementations, but engineers and physicists are a clever bunch and there are now lots of them trying every weird idea they can think of. I think they find something potentially scalable within 10 years, and then the speed of development just depends on how cost (which will be moderately expensive at first) and benefits are viewed by the institutions involved. Unlikely to be a major revenue producer for the semi-industry in the next couple of decades though -G-. For some problems there is thought to be a near-exponential growth of processing time with input size for classical computers. Example of input size: length of the RSA key you use in encrypted transactions with Netscape. Example of problem: crack the encryption. Quantum computers can do these problems in time polynomial in input size, so even a quantum computer much smaller than current classical computers could be extremely useful for certain problems. If it's thought to be worth the money, 30 years looks like a possible time frame for that (useful, but smaller, quantum computers). Never is also a possibility (though I think not very likely). Cheers, Howard