Quantum Computing and Communications
Springer London, May 21, 1999 - Business & Economics - 152 pages
We have, in the last few years, radically improved our grasp of the quantum world. Not just intellectually, either: our ability to manipulate real quantum systems has grown in equal measure with our understanding of their fundamental behavior. These two shoots - the intellectual and the practical harnessing of the quantum world - have sprung up at a time when a third shoot - information processing - has also been experiencing explosive growth. These three shoots are now becoming intertwined. Twisted together, our understanding of information processing, quantum theory and practical quantum control make for a strong new growth with enormous potential. One must always be careful about using the word 'revolutionary' too readily. It is, however, difficult to find another word to describe the developments that have been taking place during the second half of the 1990s. In 1986 Richard Feynman, the visionary professor of physics, made a very interesting remark: " ... we are going to be even more ridiculous later and consider bits written on one atom instead of the present 1011 atoms. Such nonsense is very entertaining to professors like me." It is exceptionally unfortunate that Feynman did not live to see this 'nonsense' fully transformed into reality. He, more than anybody, would enjoy the fact that it is now possible to write information onto an atom, or indeed an ion or a photon.
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Alice and Bob amplifier applications atoms basic billion binary bits cavity quantum electrodynamics channel chips classical computer coding coherent computer scientists control qubit controlled-NOT gate decoherence demonstrated detection devices efficient electron emission encoded encryption energy entangled photons Europe example experimental experiments exponential fabrication plants factor field frequency fundamental going Grover's algorithm implementation industrial input interaction ion traps laboratories large number light magnetic measurement Michael Brooks NMR quantum computers nonlinear optical nuclear spin number of qubits operations optical communications optical fiber particles perform photon number photons physicists polarization possible potential problem quantum algorithms quantum cryptography quantum dots quantum error correction quantum gates quantum information processing quantum logic gates quantum mechanics quantum noise quantum simulation quantum superposition quantum systems qubits random requires secure communications semiconductor signal silicon single qubit techniques teleportation there's three qubits transistor transmission twin photons wavelength