Spectroscopic probes of quantum gases

CJ Vale, M Zwierlein - Nature Physics, 2021 - nature.com
The foundation of atomic physics is the arsenal of spectroscopic tools to probe individual
atoms and molecules with astounding precision. With the advent of ultracold quantum …

Quantum geometry and flat band Bose-Einstein condensation

A Julku, GM Bruun, P Törmä - Physical review letters, 2021 - APS
We study the properties of a weakly interacting Bose-Einstein condensate (BEC) in a flat
band lattice system by using the multiband Bogoliubov theory and discover fundamental …

Floquet non-Abelian topological insulator and multifold bulk-edge correspondence

T Li, H Hu - Nature Communications, 2023 - nature.com
Topological phases characterized by non-Abelian charges are beyond the scope of the
paradigmatic tenfold way and have gained increasing attention recently. Here we …

Optical lattice platform for the Sachdev-Ye-Kitaev model

C Wei, TA Sedrakyan - Physical Review A, 2021 - APS
The tractability of the Sachdev-Ye-Kitaev (SYK) model at the large N limit makes it ideal to
theoretically study its chaotic non-Fermi liquid behavior and holographic duality properties …

Ab Initio Derivation of Lattice-Gauge-Theory Dynamics for Cold Gases in Optical Lattices

FM Surace, P Fromholz, ND Oppong, M Dalmonte… - PRX Quantum, 2023 - APS
We introduce a method for quantum simulation of U (1) lattice gauge theories coupled to
matter, utilizing alkaline-earth (-like) atoms in state-dependent optical lattices. The proposal …

Discrete time crystals enforced by Floquet-Bloch scars

B Huang, TH Leung, DM Stamper-Kurn, WV Liu - Physical Review Letters, 2022 - APS
We analytically identify a new class of quantum scars protected by spatiotemporal
translation symmetries, dubbed Floquet-Bloch scars. They are distinguished from previous …

Excitations of a Bose-Einstein condensate and the quantum geometry of a flat band

A Julku, GM Bruun, P Törmä - Physical Review B, 2021 - APS
The quantum geometry of Bloch states fundamentally affects a wide range of physical
phenomena. The quantum Hall effect, for example, is governed by the Chern number, and …

Direct geometric probe of singularities in band structure

CD Brown, SW Chang, MN Schwarz, TH Leung, V Kozii… - Science, 2022 - science.org
A quantum system's energy landscape may have points where multiple energy surfaces are
degenerate and that exhibit singular geometry of the wave function manifold, with major …