Quantum sensing and imaging with solid state spins in diamond

Tuesday, 14 July, 2015 - 15:00 to 16:00

Dr David Simpson, Centre for Quantum Computation & Communication Technology, School of Physics, The University of Melbourne

Diamond is an extraordinary material in many ways with many of its properties defining the extreme end of measurement scales. However, it is the flaws in diamond which have attracted enormous interest in the material over the past decade. In particular, the negatively-charged nitrogen vacancy (NV) defect in diamond has provided us with a room temperature solid state quantum system which can be conveniently polarised, readout and manipulated using a combination of optical and microwave fields.  In this talk, I will detail our journey in applying this quantum system to interesting nanoscale detection problems in biology. I will show how the fragile decoherence of the NV electronic spin can be exploited to detect weak magnetic fields from small numbers of electronic spins. I will also describe our recent research in scaling this technology up to image magnetic fields and temperature at the nanoscale over wide fields of view.