Quantum chip flunks landmark speed test

• Autores: Jacob Aron
• Localización: New scientist, ISSN 0262-4079, Nº. 2953, 2014, pág. 11
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • The quantum revolution is still in the slow lane. The first head-to-head speed test of the D-Wave Two, the commercial quantum computer recently purchased by Google, suggests that the machine performs no better than an ordinary PC. In theory, quantum computers are capable of calculating answers to problems much faster than standard PCs. Instead of storing information in bits as either 0s or 1s, quantum machines use quantum bits, or qubits, that can be both 0 and 1 at the same time. So far, however, the quantum devices built in labs can only support a handful of qubits, which limits their speed. Now a team led by Matthias Troyer of ETH Zurich in Switzerland has tested a D-Wave Two computer against a conventional machine running an optimized algorithm and found no evidence of superior performance in the quantum device.