“Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM”

Dr. Taeyoung Choi
Department of Physics, Ewha Womans University

Mar. 29 (Fri.), 04:00 PM
E6-2. 1st fl. #1323

Abstract:
Understanding, controlling, and utilizing nanoscale quantum systems have been one of major research interests across fields of physics, chemistry, and material science. In atomic molecular optics (AMO) physics, the ultracold trapped ion system has been one of leading and successful architectures for coherent quantum control and has demonstrated key ingredients for quantum computation and simulation. I will introduce basics, breakthroughs, and challenges of quantum computing.
Such quantum control has been applied to condensed matter systems which promise scalable Quantum information processing. In the second part of the talk, I will introduce a new approach to control spin states of individual atoms on surfaces combining electron spin resonance and scanning tunneling microscopy. Recently, we successfully drive spin resonance of individual Fe atoms on ultrathin insulating MgO and characterize magnetic interaction between atoms. With atomically precise position control and energy resolution, this ESR-STM demonstrates the possibility to utilize them for quantum sensing.