Conveners
Focus Session: Ultra-cold atoms and quantum technology: Focus Session: Ultra-cold atoms and quantum technology
- Xia-Ji Liu
Focus Session: Ultra-cold atoms and quantum technology: Focus Session: Ultra-cold atoms and quantum technology
- Xia-Ji Liu
Polaron quasiparticles—impurities interacting with a quantum medium—represent one of the earliest and most fundamental topics in condensed matter physics. A key feature of polaron physics is the interplay between few-body and many-body effects. In strongly interacting regimes where mean-field and perturbative methods often fail, polaron systems offer a unique opportunity for exact treatment:...
I will discuss how to utilize highly controllable quantum dynamics to study correlations in quantum many-body systems, particularly the strong correlations of quantum critical states. I will discuss two theories of non-hermitian linear response and the finite-size scaling theory of the Kibble-Zurek dynamics, and I will talk about their recent experimental realizations in cold atom systems.
Atom interferometry has emerged as a powerful tool for precision inertial sensing, with applications ranging from gravimetry to navigation and geophysics. In this talk, I will explore recent advances that push the boundaries of sensitivity and robustness in atom interferometers, with a particular focus on techniques relevant for real-world deployment.
A central theme will be the use of...
We investigate the fundamental problem of a small density of bosonic impurities immersed in a dilute Bose gas at zero temperature. Using a rigorous perturbative expansion, we show that the presence of the surrounding medium enhances the repulsion between dressed bosonic impurities (polarons) in the regime of weak interactions. Crucially, this differs from prevailing theories based on Landau...
Nonlocal entanglement between pair-correlated particles is a highly counter-intuitive aspect of quantum mechanics. While the rigorous Bell’s inequality framework has enabled the demonstration of such entanglement in photons and atomic internal states, no experiment has yet involved motional states of massive particles. Here we report the experimental observation of Bell correlations in...
Edge states are excitations in many-body systems that are spatially localised at the boundary. They exhibit desirable properties such as dissipationless transport and robustness against disorder. These features make them central to phenomena like the quantum Hall effect and topological insulators.
In a rotating planar Bose–Einstein condensates (BECs), the ground state forms a triangular...
