Field-induced stabilization in spin systems
Prof. Dr. hab. Wojciech Gawlik (Jagiellonian University, Poland)

By simultaneous application of a laser and two microwave fields upon a spin system (e.g. NV centers in diamond) one can observe magnetic resonance structures with two-component, composite shapes of nested Lorentzians with different widths. One component is regularly power-broadened, whereas the linewidth of the other one undergoes field-induced stabilization and becomes power-independent. The observed stabilization appears to be a general phenomenon that occurs in open systems. It is caused by the competition between coherent driving and non-conservation of populations and can be interpreted in terms of specific bright and dark combinations of state populations.

Bio: Studied physics at the Jagiellonian University in Kraków (MSc in 1970), 1972-74 worked in the Physikalisches Inst. der Uni Heidelberg (with G. zu Putlitz), PhD in 1975 (Uni Kraków). Longer research stays: Reading (GB) with G.W. Series, Munich with H. Walther, Paris with S. Haroche, Boulder with A. Gallagher, Berkeley with D. Budker. Head of the Atomic Optics Dept. (1990-94) and Photonic Dept. (2003-2017) in Jagiellonian Univ. (Kraków), since 2018 Professor Emeritus at the Institute of Physics Jagiellonian University.