Asia Pacific Physics Week 2024 (APPW2024)

Wednesday, Nov. 6, 2024 

2:00 PM - 2:40 PM  Plenary Talk:  Susan N. Coppersmith (University of New South Wales)

Quantum stochastic resonance of individual Fe atoms

Susan N. Coppersmith

School of Physics, UNSW Sydney, Sydney 2052 NSW, Australia

Stochastic resonance, where noise synchronizes a system’s response to an external drive, is a phenomenon that occurs in a wide variety of noisy systems ranging from the dynamics of neurons to the periodicity of ice ages. This talk will present theory and experiments on stochastic resonance in the quantum regime. An analytic theory with no adjustable parameters agrees quantitatively with experiments on the tunneling of single Fe atoms measured using spin-polarised scanning tunneling microscopy.  We also discuss how quantum stochastic resonance can be used to achieve better understanding and control in quantum nanodevices.

References: 

1. M. Hänze et al., Science Advances 7, eabg2616 (2021)

2. Y. Choi et al., preprint arXiv:2407.18829