Using atomic defects to sense and harvest quantumness
Yaroslav Tserkovnyak
 (UCLA, Los Angeles, CA, USA)
Essentially any material around us harbors some quantum fluctuations, which contain markers of relevant many-body physics as well as potential quantum utility. I will review our recent ideas to unravel and then harvest these quantum fluctuations, with a focus on magnetic materials and quantum color centers (such as nitrogen-vacancy impurities). Recent experiments on using color-center qbits as spectrally-resolved sensors of spin transport and magnetic dynamics demonstrate their strong coupling with a range of 2D materials. Inspired in part by the ideas from quantum optics and practical developments in spintronics, we thus suggest a natural integration of color-center qbits with driven magneto-electronic devices. Remarkably, classical dissipative drives can be used to switch and control scalable quantum entanglement within a proximal qbit ensemble, suggesting rich sensing and computational opportunities.