Sökning: "kvantdator"
Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet kvantdator.
1. Cerium as a quantum state probe for rare-earth qubits in a crystal
Sammanfattning : Rare-earth ions doped into a transparent crystal can have optically excited states with coherence times of milliseconds and hyperfine levels with coherence times of hours when cooled down to liquid helium temperatures. This makes them attractive for developing quantum computing hardware. LÄS MER
2. On the Power of Quantum Computation: Oracles
Sammanfattning : Quantum computation solve some computational problems faster than the best-known alternative in classical computation. The evidence for this consists of examples where a quantum algorithm outperforms the best-known classical algorithm. LÄS MER
3. Coherent Processes in Rare-Earth-Ion-Doped Solids
Sammanfattning : This thesis describes a number of coherent processes, such as quantum information processing, superradiance and electromagnetically induced transparency, which have been experimentally implemented using rare-earth-ion-doped crystals. The rare-earths are a class of elements that have in common, an atomic structure that allows for very long lifetimes as well as coherence times, both on optical transitions and on spin transitions. LÄS MER
4. Coherent Interactions in Rare-Earth-Ion-Doped Crystals for Applications in Quantum Information Science
Sammanfattning : This thesis describes investigations of the use of cryogenically cooled rare-earth-ion-doped crystals for quantum information processing and quantum optics. Several aspects of the coherent interaction between light and rare-earth ions in solids are addressed. Quantum information science has given physicists new views of quantum mechanics. LÄS MER
5. Quantum computing with naturally trapped sub-nanometre-spaced ions
Sammanfattning : The main aim of this work, was to lay the foundations for the experimental realisation of a quantum mechanical controlled NOT gate in rare-earth-metal-ion-doped crystals. Small amounts of rare-earth elements, added during the growth of some inorganic crystals, will become substituted into the crystal lattice as trivalent ions. LÄS MER