Dr German Sinuco-Leon (Department of Physics and Astronomy, University of Sussex)

The ability to apply well-controlled perturbations to quantum systems is essential to modern methodologies to study their properties (e.g. in high-precision spectroscopy), and developing quantum technologies (e.g. atomic-clocks and quantum processors). In most of the experimental platforms available today, such perturbations arise from the interaction of a quantum system with electromagnetic radiation, which creates harmonically oscillating couplings between the states of the system. Within this context, in this talk, I will describe our recent studies of the use of low-frequency electromagnetic radiation to control the external and internal degrees of freedom of ultracold atomic ensembles [1,2]. I will outline the relation of this problem with Floquet Engieering and the more general issue of describing the dynamics of driven quantum systems. Finally, I will explain the challenges of describing the quantum dynamics of systems driven and highlight the need for developing new conceptual and mathematical tools to identify universal characteristics and limitations of their dynamics.

[1] G. Sinuco-Leon, H. Mas, et al., Microwave spectroscopy of radio-frequency dressed alkali atoms, ArXiv:1904.12073, Accepted Physical Review A (2019).
[2] G. Sinuco-León and B.M. Garraway, Addressed qubit manipulation in radio-frequency dressed lattices, New Journal of Physics. 18, 035009 (2016)