Ultimate Zero and One: Computing at the Quantum Frontier by Colin P. Williams

By Colin P. Williams

As miniaturization deepens, and nanotechnology and its machines develop into extra known within the genuine global, the necessity to think about using quantum mechanical suggestions to accomplish a variety of projects in computation raises. Such talks comprise: the teleporting of knowledge, breaking heretofore "unbreakable" codes, speaking with messages that betray eavesdropping, and the iteration of random munbers. so far, there was no ebook written which applies quantum physics to the elemental operations of a working laptop or computer. This one does, hence proposing us with the precise car for explaining the complexities of quantum mechanics to scholars, researchers and computing device engineers, alike, as they arrange to layout and create the computing and data supply structures for the longer term. either authors have sturdy backgrounds within the subject material on the theoretical and learn point, in addition to adventure on a simpler aircraft. whereas additionally meant to be used as a textual content for senior/grad point scholars in laptop science/physics/engineering, this e-book has its fundamental use as an updated reference paintings within the rising interdisciplinary box of quantum computing. It does require wisdom of calculus and familiarity with the concept that of the Turing machine.

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Extra info for Ultimate Zero and One: Computing at the Quantum Frontier

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If we solve Schrodinger's equation to determine what the state of the quantum memory register will be at an arbitrary time in the future, we find that the entire evolution can be expressed, very succinctly, as a particular rotation of the arrow representing the initial state of our quantum memory register. This rotation is smooth and continuous so long as we do not attempt to read any of the qubits in the memory register. lantum Computing smooth rotation ceases and the arrow is flung against one of the axes that corresponds to just one bit string configuration.

The question is whether such phenomena confer an advantage. Do they make the capabilities of a quantum computer surpass those of a classical computer? This is an important question because it will require a massive financial investment to create quantum computers. We have to be able to determine whether the effort and expense will be justified. To address this issue, we need to define surpass more precisely. First, there is the question of computational complexity: Can a quantum computer perform the same tasks as a classical computer in significantly fewer steps?

Chapter 9 describes some ingenious schemes for building quantum computers and reports on the progress that has been made. In particular, we describe a prototypical, specialized quantum computer that has already been built and that exploits quantum effects in nuclear magnetic spectroscopy, the same technology used in medical imaging. " In quantum computing, merely having a computer that could return the answer to some computation if that computer were run, is enough to obtain the answer even though the computer is not run!

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