Upendra Kumar

Korea Institute of Ceramic Engineering and Technology, Korea

26 June 2023 Mon 4 pm

                                      IBS Center for Theoretical Physics of Complex Systems (PCS), Administrative Office (B349), Theory Wing, 3rd floor

                                      Expo-ro 55, Yuseong-gu, Daejeon, South Korea, 34126 Tel: +82-42-878-8633                     

Floquet engineering, an intriguing application of high-frequency electromagnetic fields, enables precise control over electronic parameters in condensed-matter structures. This control is rooted in Floquet theory, which governs periodically driven quantum systems and gives rise to a multitude of fundamental effects. In this presentation, we delve into the investigation of Floquet oscillations under various external field conditions, encompassing continuous, pulsed, and quantized scenarios. Our study sheds light on the behavior and characteristics of Floquet oscillations, uncovering their captivating phenomena. Additionally, we delve into the intriguing phenomenon of the Bloch-Siegert shift within the realm of Floquet oscillations, accentuating its relevance and potential implications. Moreover, we present a method for detecting Floquet oscillations by leveraging pump-probe spectra, yielding valuable insights into their experimental manifestation. Lastly, we explore the emergence of collapse-revival spectra within the Floquet frequency domain, underscoring the profound influence stemming from the quantized nature of Floquet oscillations. In sum, this presentation offers a captivating glimpse into the intricate world of Floquet oscillations, unraveling their diverse aspects and captivating possibilities.

  1. floquet engineering: exploring control and phenomena of high-frequency electromagnetic fields in condensed-matter structures