Engineering of Feshbach Resonances by a Floquet Drive*

Feshbach resonances are a common tool in order to control the scattering length in ultracold quantum gases [1]. In this talk we discuss how time-periodic driving enables to induce novel resonances that are fully controllable by the parameters of the drive [2,3]. A theory allowing a deeper understanding of these driving induced resonances within the Floquet picture is given. Our method is capable of describing resonance positions and widths for general inter-particle potentials. We demonstrate our results on an experimentally relevant example.

[1] C. Chin et al., Rev. Mod. Phys. 82, 1225 (2010).

[2] D.H. Smith, Phys. Rev. Lett. 115, 193002 (2015).

[3] A.G. Sykes et al., Phys. Rev. A 95, 062705 (2017).