Instabilities, where small fluctuations seed the formation of large-scale structures, govern dynamics in a variety of fluid systems. The Rayleigh-Taylor instability (RTI), present from tabletop to astronomical scales, is an iconic example characterized by mushroom-shaped incursions appearing when immiscible fluids …
The Rayleigh-Taylor instability in a binary quantum fluid Read more »
Much of our knowledge of quantum systems is encapsulated in the expectation value of Hermitian operators, experimentally obtained by averaging projective measurements. However, dynamical properties are often described by products of operators evaluated at different times; such observables cannot be …
Dynamical structure factor from weak measurements Read more »
At the 2025 Early Career Poster Presentation, Dario took home the “Most Outstanding Poster in Physics” with his poster Nondestructive Characterization of Cold Atomic Clouds with Machine Learning!
https://jqi.umd.edu/news/mysteriously-mundane-turbulence-revealed-2d-superfluid
Geometrical frustration and long-range couplings are key contributors to create quantum phases with different properties throughout physics. We propose a scheme where both ingredients naturally emerge in a Raman induced subwavelength lattice. We first demonstrate that Raman-coupled multicomponent quantum gases …
We investigated turbulence in 2D atomic Bose-Einstein condensates (BECs) using a minimally destructive, impurity injection technique analogous to particle image velocimetry in conventional fluids. Our approach transfers small regions of the BEC into a different hyperfine state and tracks their …
Kolmogorov Scaling in Turbulent 2D Bose-Einstein Condensates Read more »
Weak measurement enables the extraction of targeted information from a quantum system while minimizing decoherence due to measurement backaction. However, in many-body quantum systems, backaction can have unexpected effects on wave-function collapse. We theoretically study a minimal many-particle model consisting …
Measurement resolution enhanced coherence for lattice fermions Read more »
We consider solitary wave excitations above the ground state of 𝐹=1 spin-orbit-coupled Bose-Einstein condensates (SOBECs). The low-energy properties of SOBECs in any of the three branches of the single-particle dispersion relation can be described by suitable scalar nonlinear Schrödinger (NLS) equations which we …
Stationary solitary waves in F=1 spin-orbit-coupled Bose-Einstein condensates Read more »
Congratulations Junheng! Even with large dissipation, March 12, 2024 will not be lost to time.
