Dr. Shangjie Guo defends his thesis!
On this day, April 4, 2022, Shangjie Guo defended his thesis. Congratulations Shangjie!
Category: Theory
Feedback-stabilized dynamical steady states in the Bose-Hubbard model
The implementation of a combination of continuous weak measurement and classical feedback provides a powerful tool for controlling the evolution of quantum systems. In this paper, we investigate the potential of this approach from three perspectives. First, we consider a …
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Wilson loop and Wilczek-Zee phase from a non-Abelian gauge field
Quantum states can acquire a geometric phase called the Berry phase after adiabatically traversing a closed loop, which depends on the path not the rate of motion. The Berry phase is analogous to the Aharonov–Bohm phase derived from the electromagnetic …
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Machine-learning enhanced dark soliton detection in Bose–Einstein condensates
Most data in cold-atom experiments comes from images, the analysis of which is limited by our preconceptions of the patterns that could be present in the data. We focus on the well-defined case of detecting dark solitons—appearing as local density …
Machine-learning enhanced dark soliton detection in Bose–Einstein condensates Read more »
JQI writeup of: Topological features without a lattice in Rashba spin-orbit coupled atoms
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. …
Topological features without a lattice in Rashba spin-orbit coupled atoms
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 »
Feedback induced magnetic phases in binary Bose-Einstein condensates
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 …
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Enhanced transport of spin-orbit-coupled Bose gases in disordered potentials
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 »
Paper in top 17 PRA’s in the past 50 years!
“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
Measurement-induced dynamics and stabilization of spinor-condensate domain walls
Weakly measuring many-body systems and allowing for feedback in real time can simultaneously create and measure new phenomena in quantum systems. We theoretically study the dynamics of a continuously measured two-component Bose-Einstein condensate (BEC) potentially containing a domain wall and …
Measurement-induced dynamics and stabilization of spinor-condensate domain walls Read more »