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Josephson junction |
Also found in: Dictionary/thesaurus, Hutchinson | 0.11 sec. |
Josephson junctionAn ultra-fast switching technology that uses superconductor materials, originally conceived by Brian Josephson. Circuits are immersed in liquid helium to obtain near-absolute zero degrees required for operation. Switching takes place in a few picoseconds. Although Josephson junctions have not materialized for computer circuits, they have been used thus far in medical instruments that sense brain waves.
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Josephson junctions are good candidates for a quantum computer with recent experiments demonstrating reasonably long coherence times, state preparation, manipulation and measurement, and coupling of qubits for even-tual gate operations. Benz and his coworkers, for example, take advantage of phase locking to ensure that large arrays of superconducting Josephson junctions display voltage oscillations of a well-defined frequency, despite small differences among the individual components. These chips utilize Josephson junctions approximately 1. |
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