by Prof. Dr. Jörg Wrachtrup, Institute for Quantum Science and Technology, University of Stuttgart, Germany
19.04.2018, 17:00 h, TF, Aquarium
The accuracy of measurements is limited by quantum mechanics. Ingenious demonstrations, like measuring gravitational fields or time have explored accuracy limits and reached fundamental obstructions. Yet, precision measurements so far are restricted to dedicated environmental conditions essentially excluding “every day” applications. In the talk I will discuss spin quantum sensors comprising a single or multiple electron spins. With such a system we measure a variety of quantities including electric and magnetic fields, temperature, and force under ambient conditions. We use nuclear spins to enhance the measurement accuracy of the electron spin e.g. via quantum error correction or as ancillary quantum bits as memory or for quantum Fourier transformation [1-3]. I will present a variety of applications ranging from quantum simulations to imaging of cellular structures. I will emphasize the engineering challenges of these sensors and discuss their use to e.g. measure biomagnetic fields.
 N. Aslam et al. Science 0.1126/science.aam8697 (2017)
 L. Schlipf et al. Science Advances 3:e1701116 (2017) DOI: 10.1126/sciadv.1701116
 F. F. de Oliveira, et al. Nat. Commun. 8, 15409 doi: 10.1038/ncomms15409 (2017)