Quantum Systems Unit
Ultracold quantum gases have over the past two decades become one of the go-to systems for studying quantum mechanics in clean and highly configurable settings. A large number of techniques exist that allow to change almost any part of the Hamiltonian over a broad range of parameters and thereby create fully controllable synthetic quantum systems that can be used to explore physics in new regimes and with low noise. They are also paradigmatic systems to explore ideas and concepts from quantum information and quantum engineering.
Our theoretical work focuses on different aspects of these systems, and we are particularly interested in understanding the influence of interactions on the dynamics and control of few particle systems. This includes mean-field dynamics in superfluid condensates, but also the exact dynamics in multi-component, small and/or low-dimensional quantum systems. In particular we concentrate on studying adiabatic dynamics, STA dynamics and quench dynamics starting from well-defined initial states. The influence of correlations on many-body physics is one of our focal points and, more recently, the characterisation of systems via ideas from quantum thermodynamics.
At the same time, we also carry out work on light-matter interactions for atoms trapped in the nearfield of an optical nanofiber. We are moving the description of such systems towards more complicated settings, opening the possibilities for more control and new physical effects. This work, as most other works as well, is close to experimentally realistic setups, which is an important aspect of all projects carried out.
After passing his thesis, getting properly dressed up and sorting all his paperwork, Mathias is finally off for his new adventure in Osaka with Ippei Danshita at Kindai University. Thank you for having worked with us and best of luck for all your future plans!
Researchers show that a quantum sensor using a single atom can accurately measure the coldest places in the universe. Learn more from here.
Feshly awarded PhDs Jiabao and James are off to new adventures (one each) and we will miss them dearly. They are equipped with all OIST had to offer and will, no doubt, be great ambassadors for Okinawa.