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Presentation Halle B1 SEMICON EUROPA > TechARENA 1 & 2 - Technological Platform for Innovation > Disruptive Computing
12:45-13:05 Uhr | Halle B1 Tech Arena 2, Booth B1.770
Themen: SEMICON EUROPA
Quantum computers exploit the phenomenon of quantum superposition, or the counterintuitive ability of small particles to inhabit contradictory physical states at the same time. An electron, for instance, can be said to be in more than one location simultaneously, or to have both of two opposed magnetic orientations. Where a bit in a conventional computer can represent zero or one, a qubit can represent zero, one, or both at the same time. It’s the ability of strings of qubits to simultaneously explore multiple solutions to a problem that promises computational speedups.Diamond-defect qubits result from the combination of “vacancies,” which are locations in the diamond’s crystal lattice where there should be a carbon atom but there isn’t one, and “dopants,” like nitrogen atoms placed in direct neighborhood to the vacancy. Together, the dopant and the vacancy create a donor-vacancy center, which has a free electron associated with it. The electrons magnetic orientation, or spin, which can be in superposition, constitutes the qubit. Donor-vacancy centers in diamond potentially can work at room temperature and are therefore considered a very attractive technology for building quantum networks. The biggest drawback to donor-vacancy centers in diamond is the difficulty of fabrication. Researchers either look for naturally-occurring defects in diamond, or fire atoms at a piece of diamond at high energy, creating defects in modulation doped lattice. We review the remarkable progress made in the past years in controlling electrons, atomic nuclei, and light at the single-quantum level in diamond. We also discuss prospects and challenges for the use of donor-vacancy centers in future quantum technologies.