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December 4th, 2007
Quantum computers and quantum information technology remain in a pioneering stage, says Vishal Sahni, author of ‘Quantum Computing' ( http://www.tatamcgrawhill.com ). "Currently, there are obstacles to be surmounted, before we have the knowledge to thrust quantum computers up to their rightful position as the fastest computational machines in existence."
Quantum systems possess immense computational power due to the startling property of quantum bits (or qubits) that they can exist in a superposition of two or more states at once, thereby opening up immense possibilities like quantum parallelism, quantum entanglement, teleportation, superdense coding and so on, he explains, during the course of a recent e-mail interview with Business Line.
"The scale of quantum physical phenomena is so vast, that even a super computer built on von Neumann style computing cannot realistically model quantum physics at the atomic and sub-atomic level. On the other hand, quantum computers, which mimic the quantum physics themselves, are capable of vast parallelism and could theoretically simulate such phenomena."
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