In cold atom experiments, each image of light refracted and absorbed by an atomic ensemble carries a remarkable amount of information. Numerous imaging techniques including absorption, fluorescence, and phase-contrast are commonly used. Other techniques such as off-resonance defocused imaging (ORDI, …
Multiple-camera defocus imaging of ultracold atomic gases Read more »
We quantum simulated the 2D Harper-Hofstadter (HH) lattice model in a highly elongated tube geometry—three sites in circumference—using an atomic Bose-Einstein condensate. In addition to the usual transverse (out-of-plane) magnetic flux, piercing the surface of the tube, we threaded a …
Coherence and decoherence in the Harper-Hofstadter model Read more »
Spielman group alumna Dr. Dina Genkina has composed a high level write-up of Dr. Ana Valdés-Curiel’s Rashba paper! https://jqi.umd.edu/news/researchers-comb-atoms-into-novel-swirl Topological features without a lattice in Rashba spin-orbit coupled atoms; A. Valdés-Curiel, D. Trypogeorgos, Q.-Y. Liang, R. P. Anderson, and I. …
Quantum simulators are a promising technology on the spectrum of quantum devices from specialized quantum experiments to universal quantum computers. These quantum devices utilize entanglement and many-particle behavior to explore and solve hard scientific, engineering, and computational problems. Rapid development …
Quantum Simulators: Architectures and Opportunities Read more »
Topological order can be found in a wide range of physical systems, from crystalline solids, photonic meta-materials and even atmospheric waves to optomechanic, acoustic and atomic systems. Topological systems are a robust foundation for creating quantized channels for transporting electrical …
Topological features without a lattice in Rashba spin-orbit coupled atoms Read more »
Weak measurement in tandem with real-time feedback control is a new route toward engineering novel nonequilibrium quantum matter. Here we develop a theoretical toolbox for quantum feedback control of multicomponent Bose-Einstein condensates (BECs) using backaction-limited weak measurements in conjunction with …
Feedback induced magnetic phases in binary Bose-Einstein condensates Read more »
On this day, November 2, 2020, Yuchen Yue remotely defended his thesis. Congratulations Yuchen!
Anderson localization is a single-particle localization phenomena in disordered media that is accompanied by an absence of diffusion. Spin-orbit coupling (SOC) describes an interaction between a particle’s spin and its momentum that directly affects its energy dispersion, for example, creating …
Enhanced transport of spin-orbit-coupled Bose gases in disordered potentials Read more »
“Realistic Rashba and Dresselhaus spin-orbit coupling for neutral atoms” with coauthors D. L. Campbell, G. Juzeliūnas was named one of the top 17 PRA’s over the past 50 years! Also see the JQI write up! https://jqi.umd.edu/news/pra-highlights-work-jqi-fellow-during-50th-anniversary-celebration
Established techniques for deterministically creating dark solitons in repulsively interacting atomic Bose-Einstein condensates (BECs) can only access a narrow range of soliton velocities. Because velocity affects the stability of individual solitons and the properties of soliton-soliton interactions, this technical limitation …
Creating solitons with controllable and near-zero velocity in Bose-Einstein condensates Read more »