Heidelberg 2015 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 14: Precision Measurements and Metrology II (with A)

Q 14.3: Vortrag

Montag, 23. März 2015, 15:15–15:30, P/H1

Nanoscale magnetic field sensing enhanced by repeated quantum error correction — •Thomas Unden¹, Priya Balasubramanian¹, Daniel Louzon^1,4, Yuval Vinkler⁴, Martin B. Plenio², Matthew Markham⁵, Daniel Twitchen⁵, Mikhail D. Lukin³, Alex Retzker⁴, Boris Naydenov¹, and Fedor Jelezko¹ — ¹Institut für Quantenoptik, Universität Ulm, 89089 Ulm — ²Institut für theoretische Physik, Universität Ulm, 89089 Ulm — ³Quantum Optics Laboratory , Harvard University, 02138 Cambridge — ⁴The Racah Institute of Physics, Hebrew University of Jerusalem, 91904 Jerusalem — ⁵Element 6

Coherent control of quantum systems offers unique possibilities for precise sensing and metrology. Examples of such well controlled systems are spins associated with single colour centers in diamond that were shown to be promising electric and magnetic field sensors at the nanoscale. The performance of a sensing technique is related to its ability to acquire a phase and to its capacity to reduce perturbations caused by environmental noise. State of the art techniques, however, can only tackle low frequency noise and are thus unable to support sensing of signals in a wide range of settings. Here we experimentally demonstrate for the first time a novel technique of magnetic field sensing enhanced by quantum error correction protocols, which can tackle noise at any frequency, using an electron spin in diamond associated with a single nitrogen-vacancy (NV) center.