Two-fluid spin dynamics in magnetic insulators, which stands broadly for the interplay between the coherent and incoherent spin degrees of freedom, is attracting a growing interest in the fields of spintronics and nonequilibrium magnetism [1,2,3]. I will review recent developments, both theoretical and experimental, with a focus on the problems of the microwave control and NV-center detection of the spin chemical potential, and thermoelectric pumping of magnonic condensates, all within a unified framework of nonequilibrium thermodynamics . At the core of the discussion will be quantum transport of heat and spin at interfaces and dynamic phase transitions associated with spontaneous coherence in the bulk. An outlook towards the quantum-information utility of the two-fluid spin dynamics will be provided at the end .
Professor Tserkovnyak completed the B.Sc. program in Physics and Mathematics at the university of British Columbia in 1999. He then completed his Ph.D. in Physics at Harvard University in 2003 under the supervision of Prof. Bertrand Halperin. After that, he stayed on as Harvard Junior Fellow for three more years, one of the most prestigious postdoctoral positions in the world. Since 2006 he is on faculty at the University of California, Los Angeles, where he became a full professor in 2013. He won several prizes, among which are the Simons Fellows in Theoretical Physics in 2012 and the Alexander von Humboldt Research Prize in 2017. Prof. Tserkovnyak interests lie broadly in the theory of quantum transport and nonequilibrium phenomena in nanostructures, with various applications in classical and quantum information.