5 papers
Tunable Molecular Interactions Near an Atomic Feshbach Resonance: Stability and Collapse of a Molecular Bose-Einstein Condensate
Zhiqiang Wang, Ke Wang, Zhendong Zhang +3
Understanding and controlling interactions of ultracold molecules is a cornerstone of quantum chemistry. While the laboratory creation of degenerate molecular gases comprised of bo…
Universal approach to light driven "superconductivity" via preformed pairs
Ke Wang, Zhiqiang Wang, Qijin Chen +1
While there are many different mechanisms which have been proposed to understand the physics behind light induced ``superconductivity", what seems to be common to the class of mate…
Universal coherent atom-molecule oscillations in the dynamics of the unitary Bose gas near a narrow Feshbach resonance
Ke Wang, Zhendong Zhang, Shu Nagata +2
Quench experiments on a unitary Bose gas around a broad Feshbach resonance have led to the discovery of universal dynamics. This universality is manifested in the measured atomic m…
Droplets of Bosons at a Narrow Resonance
Ke Wang, Thimo Preis, Dam Thanh Son
We consider bosons interacting through a narrow -wave resonance. Such a resonance is characterized by an infinite scattering length and a large and negative effective range $r_0…
The Higgs-Amplitude mode in the optical conductivity in the presence of a supercurrent: Gauge-invariant formulation with disorder
Ke Wang, Rufus Boyack, K. Levin
Observing the ``Higgs" or amplitude mode in superconductors has been a central challenge in condensed matter physics. Moreover, arriving at a theoretical understanding of this mode…