IQST Grad School Project

Integrated MW Circuits for Rydberg Dressing in Thermal Vapor Cells

Project Description:

The goal of this project is to integrate microwave guiding structures (up to 70 or even 120 GHz) into a thermal vapor cell filled with alkali atoms. Such a cell can on the one hand be used as a sensitive detector [1] with a high spatial [2] and vector [3] resolution for the MW radiation fields produced by the MW circuit. On the other hand MW dressing of Rydberg states can be used to enhance or decrease the sensitivity of the Rydberg atoms to electric fields [4] or to change the interaction between these atoms from a Van-der-Waals type (~1/r^6) to a dipole type (~1/r^3), which can increase the interaction length significantly [5]. Thin film technology allows to integrate the required circuit into our cells.

MW dressing offers a unique way to tune the interactions between Rydberg atoms from a pure Van-der-Waals type to a dipole type. This transition should be visible in dephasing rates [6] and interaction properties [7], including Rydberg blockade effects. Being able to engineer the interaction distance of Rydberg atoms, especially increasing it, allows for higher optical depth per blockade volume at easy to handle temperatures.