Nanoscale Quantum Sensing
Guest Speaker
Jörg Wrachtrup
Institute for Quantum Science and Technology (IQST) and Center for Applied Quantum Technologies
University of Stuttgart, Germany
Abstract
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 macroscale and dedicated environments. In the talk I will discuss spin quantum sensors comprising a single electron spin plus a nuclear spin quantum register. With such a system we measure a variety of quantities including electric and magnetic fields, temperature, and force. We use nuclear spins to enhance the measurement accuracy of the electron spin e.g. via quantum error correction, as ancillary quantum bits for memory or quantum Fourier transformation. I will present a variety of applications ranging from quantum simulations to imaging of magnetic nanostructures.
About the Speakers
Jörg Wrachtrup, Professor and Director of the 3rd Institute of Physics and the Center for Applied Quantum Science, University of Stuttgart (since 2000) as well as Max Planck fellow at the Max Planck Institute for Solid State Research Stuttgart, has pioneered the field of single spin physics. By combining optics and spin resonance he discovered defects in insulators, most notably defects in diamond, as a valuable system for quantum information processing. His current research interest is in application of quantum enhanced sensing in biological, medical as well as material sciences. Professor Wrachtrup has published close to 300 papers in leading refereed journals. He received the Leibniz Prize (2012) of the German Science Foundation, the Bruker Prize (2013) and the Max Planck Research Award (2014). He is a member of the Berlin Brandenburg Academy of Science and has continuously been listed as “Highly Cited Researcher” since 2014.
Herman Z. Cummins (1933 – 2010) joined the Physics Department of City College in 1974 as a Distinguished Professor of Physics, and immediately established his laser spectroscopy laboratory as one of the leading research sites in the world. His cutting-edge investigations cover: statistics of radiation-matter interactions, as well as elastic, quasi-elastic and inelastic light scattering (Rayleigh, Brillouin and Raman). His many seminal studies have elucidated the physical mechanisms in diverse areas: paraelectric ferroelectric phase transitions, commensurate-incommensurate transitions, exciton and polariton formation and dynamics, liquid glass and colloidal systems, and many more. Herman Cummins received numerous honors for his scientific contributions. He was elected a Member of the US National Academy of Sciences (1996); a Fellow of the American Academy of Arts & Sciences (2001), and to the Johns Hopkins Society of Scholars (2010). He was awarded the Docteur es Sciences, honoris causa, by the Universite de Paris, and a Senior Fellowship by the Humboldt Foundation. Earlier he received the Alfred P. Sloan Research Fellowship (1969-72), Guggenheim Fellowship (1984), and was elected Fellow of the American Physical Society and the New York Academy of Sciences.