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Abstract
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| Quantum computers have the potential to solve problems too complex for any classical computer. There are many proposed types of quantum bit (qubit), using for example, light, superconductors, semiconductors, trapped atoms or ions. It is not clear which of these has all the necessary properties (coherence, scalability etc). However, each presents technological challenges and goals that are interesting and fruitful in their own right, and tell us more about quantum mechanics and the act of measurement of quantum systems. Solid-state semiconductor-based qubits (in quantum dots) have many advantages, since they can be produced using fairly standard lithography, which potentially can be scaled to produce thousands of qubits, and electrons can be made to interact controllably with neighbouring qubits. Our particular proposal uses single-electron dots dragged along parallel channels by a surface acoustic wave. In places, adjacent dots come close so that electrons become entangled (two-qubit operations). In others, nanomagnets can rotate their spins (single-qubit operations). Readout can be by recombining the electrons with holes, to generate polarised photons. I will describe our measurements of coherent charge oscillations and of charge transfer between separated static dots | |
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International
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No |
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Congress
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Cursos y Seminarios del ISOM |
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Entity
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ISOM |
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Entity Nationality
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Sin nacionalidad |
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Place
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Madrid, España |
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Start Date
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25/06/2012 |
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End Date
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25/06/2012 |