Robust solutions to hard problems: Twenty-first century computers could achieve astonishing speed by exploiting the principles of quantum mechanics
Article Abstract:
Emanuel Knill and colleagues of Los Alamos National Laboratory have shown that quantum computers can achieve arbitrarily high reliability as long as it is properly design and its components work within a specified tolerance. Quantum computers process information encoded in quantum states, and, in principle, it can solve certain hard problems much faster than other digital devices. Knill and colleagues have analyzed a more general and realistic class of error model, and the principles of fault tolerance could be adapted to realistic laboratory situations.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Josephson-junction qubits with controlled couplings
Article Abstract:
Quantum computers could undertake some task more efficiently than classical computers by using different physical principles. Such a computer would consist of coupled, two-state quantum systems or qubits, with coherent time evolution controlled in computation. Solid-state qubits are proposed that use controllable, low-capacitance Josephson junctions. Coherent tunnelling of Cooper pairs in the superconducting state are used and the advantages include simplified operation and reduction of errors.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Demonstrating the viability of universal quantum computation using teleportation and single-qubit operations
Article Abstract:
Quantum teleportation is a method where the state of a quantum bit is transported from one point to another by communicating two classical bits. Several features of the procedure are considered, showing that single quantum bit operations, Bell-basis measurements and certain entangled quantum states, are sufficient to built a universal quantum computer.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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