Dr. Ana Valdés-Curiel defends her thesis!
On this day, Dec. 2, 2019, Ana Valdés-Curiel has become Dr. ! Congratulations Ana.
Author: Ian Spielman
Ian named 2019 Clarivate “Highly Cited Researcher”
Ian was one of five faculty members in the University of Maryland’s College of Computer, Mathematical, and Natural Sciences are included on Clarivate Analytics’ 2019 list of Highly Cited Researchers, a compilation of influential names in science. https://cmns.umd.edu/news-events/features/4508
Repeated measurements with minimally destructive partial-transfer absorption imaging
We demonstrate partial-transfer absorption imaging as a technique for repeatedly imaging an ultracold atomic ensemble with minimal perturbation. We prepare an atomic cloud in a state that is dark to the imaging light. We then use a microwave pulse to …
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Sauter–Schwinger effect with a quantum gas
The creation of particle–antiparticle pairs from vacuum by a large electric field is at the core of quantum electrodynamics. Despite the wide acceptance that this phenomenon occurs naturally when electric field strengths exceed Ec ≈ 1018 V m−1, it has yet to be experimentally …
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 …
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Emergent gauge field and the Lifshitz transition of spin-orbit coupled bosons in one dimension
In the presence of strong spin-independent interactions and spin-orbit coupling, we show that the spinor Bose liquid confined to one spatial dimension undergoes an interaction- or density-tuned quantum phase transition similar to one theoretically proposed for itinerant magnetic solid-state systems. …
Imaging topology of Hofstadter ribbons
Physical systems with non-trivial topological order find direct applications in metrology (Klitzing et al 1980 Phys. Rev. Lett. 45 494–7) and promise future applications in quantum computing (Freedman 2001 Found. Comput. Math. 1 183–204; Kitaev 2003 Ann. Phys. 303 2–30). …
Scale-Invariant Continuous Entanglement Renormalization of a Chern Insulator
The multiscale entanglement renormalization ansatz (MERA) postulates the existence of quantum circuits that renormalize entanglement in real space at different length scales. Chern insulators, however, cannot have scale-invariant discrete MERA circuits with a finite bond dimension. In this Letter, we …
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Topological bands for ultracold atoms
There have been significant recent advances in realizing band structures with geometrical and topological features in experiments on cold atomic gases. This review summarizes these developments, beginning with a summary of the key concepts of geometry and topology for Bloch …
Artificial gauge fields with ultracold atoms
Gauge fields are ubiquitous in nature. In the context of quantum electrodynamics, you may be most familiar with the photon, which represents the gauge field mediating electromagnetic forces. But there are also gluons, which mediate strong forces, and the W …