Research group Quantum Dynamics and Sensing Theory Group

A central theme of our research is quantum metrology, where we investigate how precisely quantum systems can respond to and record external and internal influences. In particular, we study how physical parameters — such as force, acceleration, or other effects — become imprinted on quantum states, and how these signatures can be extracted through measurement. A key goal is to understand the fundamental limits imposed on parameter estimation, and to develop sensing protocols that utilise nonlinearities and other quantum properties to surpass both the classical limit and the standard quantum limit.

We are also interested in the theory of mechanical quantum resonators, which represent some of the largest and most massive quantum systems that can currently be controlled in laboratory settings. These systems provide a unique platform for exploring macroscopic quantum behaviour and for developing highly sensitive force and displacement sensors. Mechanical resonators are typically read out and controlled by coupling them to auxiliary quantum systems — most commonly optical or microwave cavity fields — forming the basis of cavity optomechanics. Through the probe field, mechanical motion can be detected with extraordinary precision and manipulated using radiation pressure and quantum measurement techniques. Optomechanical platforms, in particular, provide rich opportunities to engineer non-classical states of light and motion that improve sensitivity to weak signals. Current projects in the group include the creation of protocols for creating mechanical cat-states, as well as comparisons between the sensing power of cavity optomechanical systems in the nonlinear and linear regimes.

We are also motivated by questions at the interface between quantum mechanics and gravity. Mechanical quantum systems and precision sensing platforms provide promising routes to probe extremely weak forces and subtle physical effects that may arise from gravitational physics, possible modifications of quantum theory, or other beyond-standard-model phenomena. By combining ideas from quantum sensing and the quantum-and-gravity overlap, we aim to explore how large-mass and other quantum systems can be used to test new physical theories or detect faint gravitational signatures.

Our research combines analytical theory and mathematical modelling of open quantum systems or systems with nonlinear
dynamics. We develop theoretical tools for describing both closed and open dynamics building on a Lie algebra decoupling methos and analytical solutions of the Lindblad equation. These techniques allow us to model experimentally relevant systems and to design sensing protocols that approach the ultimate sensing limits set by quantum mechanics.

As a group, we strive towards modelling scientific curiosity and creating a positive working environment together. If you would like to join the group, as a Bachelor student, Masters student, PhD student or Postdoctoral research, don't hesitate to get in touch!