Can we build a quantum computer?
We know how quantum physics works in the atomic level, but does it translate into the “macro” level enough to allow us to use it in practical ways?
Physicist Anthony Leggett thinks that there are too many issues with quantum theory to think of it as anything more than an approximation of reality. In New Scientist, Michael Brooks quotes him as saying, “Everything depends on whether you believe quantum mechanics is going to go on describing the physical world perfectly to whatever level you push it. I’m inclined to put my money on the idea that if we push quantum mechanics hard enough it will break down and something else will take over–something we can’t envisage at the moment.”
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