Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 6: Precision Measurements and Metrology II (with Q)

A 6.3: 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 Louzon1,4, Yuval Vinkler4, Martin B. Plenio2, Matthew Markham5, Daniel Twitchen5, Mikhail D. Lukin3, Alex Retzker4, Boris Naydenov1, and Fedor Jelezko11Institut 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.

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DPG-Physik > DPG-Verhandlungen > 2015 > Heidelberg