DPG Phi
Verhandlungen
Verhandlungen
DPG

Konstanz 1998 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

Q: Quantenoptik

Q 37: Poster IIi: Symposium Quantenkommunikation

Q 37.1: Poster

Wednesday, March 18, 1998, 16:00–18:00, PF

On the Improvement of Frequency Standards using Quantum Entanglement — •M. B. Plenio1, S. F. Huelga2, C. Macchiavello2, T. Pellizzari2, A. Ekert2, and J. I. Cirac31Optics Section, The Blackett Laboratory, Imperial College, London SW7 2BZ, UK — 2Clarendon Laboratory, Department of Physics, University of Oxford, UK — 3Institut für Theoretische Physik, Universität Innsbruck, 6020 Innsbruck, Austria

The optimal precision of frequency measurements in the presence of decoherence is discussed. We analyse different preparations of n two-level systems as well as different measurements procedures. We show that standard Ramsey spectroscopy on uncorrelated atoms and optimal measurements on maximally entangled states provide the same resolution. The best resolution is achieved using partially entangled preparations with a high degree of symmetry. We also present possible error correction schemes to reduce the impact of decoherence on the ions in a frequency standard.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 1998 > Konstanz