We demonstrate the use of a ring-shaped Bose-Einstein condensate as a rotation sensor by
measuring the interference between two counter-propagating phonon modes imprinted …

Optical atomic clocks with high precision allow minute frequency shifts to be measured in
short timescales. Low instability requires an atomic frequency reference with a high quality …

Quantum fluids are characterized by integer-quantized vortices due to their phase
coherence. Systems with additional internal degrees of freedom have far more complex …

Quantum simulation is the study of one quantum mechanical system via analog with
another. In this thesis we explore a simple model of interacting bosons on a lattice, known as …

Methods to generate, manipulate, and measure optical and atomic fields with global or local
angular momentum have a wide range of applications in both fundamental physics research …

Ultracold atomic gas systems provide a remarkably versatile platform for studying a wide
range of physical phenomena, from analogue particle physics and gravity, to the emergence …

Ultracold atomic system provides us a versatile platform to address problems ranging from
quasi-particle excitations supported by a variety of ground states, to cold collisions which …

Understanding non-equilibrium systems are challenging, because they are usually
accompanied by either strong time-dependent perturbations or non-vanishing energy and …

Since the first realization of the superfluid He-4 in the 1930s, superfluidity has been one of
the central topics in the modern physics. In particular, the advent of ultra-cold atomic gas (or …