Terahertz quantum sensing with bilayer graphene quantum dots in resonators

Research Project, 2024 – 2026

The emerging realm of quantum technologies promises unprecedented advances in fields such as sensing and high-performance computing.These technologies have been so far implemented predominantly in the microwave and optical regimes and have an untapped potential in the terahertz (THz) spectral range.
The emerging realm of quantum technologies promises unprecedented advances in fields such as sensing and high-performance computing. These technologies have been so far implemented predominantly in the microwave and optical regimes and have an untapped potential in the terahertz (THz) spectral range. "ThinQ" proposes a pioneering endeavor into the realm of terahertz (THz) quantum sensing. By leveraging the unique electronic properties of bilayer graphene quantum dots (BLG QDs) coupled to THz resonators, the project aims to develop a new technology for THz quantum sensing that goes beyond the standard quantum limit. The initiative is partitioned into two focus areas. The first concentrates on the development and characterization of THz photon detectors, utilizing BLG QDs coupled to a high-quality factor THz resonator to enhance light-matter interaction. The goal is to demonstrate THz photon detection with superior quantum efficiency and for single THz photon detection.The second embarks on quantum sensing beyond the standard quantum limit by harnessing non-classical light. Capitalizing on the strong coupling of a THz resonator with BLG DQD, we aim to generate THz squeezed light and to explore the ultra-strong coupling regime for the detection of non-classical states of THz light. By effectively integrating BLG QDs and THz resonators, "ThinQ" will thereby develop THz detectors with unmatched sensitivity and novel building blocks for quantum sensing with squeezed light.