Dr. Junheng Tao defended his thesis with a non-Hermitian flair!
Congratulations Junheng! Even with large dissipation, March 12, 2024 will not be lost to time.
Category: RbLi
Whoo-hoo! Dr. Mingshu Zhao defended his thesis!
Way to go Mingshu! March 1, 2024 will live on in history.
Observation of Anisotropic Superfluid Density in an Artificial Crystal
We experimentally and theoretically investigate the anisotropic speed of sound of an atomic superfluid (SF) Bose-Einstein condensate in a 1D optical lattice. Because the speed of sound derives from the SF density, this implies that the SF density is itself …
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A 20 A bipolar current source with 140 μA noise over 100 kHz bandwidth
The precise control of direct current (dc) magnetic fields is crucial in a wide range of experimental platforms, from ultracold quantum gases and nuclear magnetic resonance to precision measurements. In each of these cases, the Zeeman effect causes quantum states …
A 20 A bipolar current source with 140 μA noise over 100 kHz bandwidth Read more »
Multiple-camera defocus imaging of ultracold atomic gases
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, …
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Coherence and decoherence in the Harper-Hofstadter model
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 »
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 »
Realization of a deeply subwavelength adiabatic optical lattice
We propose and describe our realization of a deeply subwavelength optical lattice for ultracold neutral atoms using N resonantly Raman-coupled internal degrees of freedom. Although counterpropagating lasers with wavelength λ provided two-photon Raman coupling, the resultant lattice period was λ/2N, an N-fold reduction as compared to …
Realization of a deeply subwavelength adiabatic optical lattice Read more »
Dr. Ana Valdés-Curiel defends her thesis!
On this day, Dec. 2, 2019, Ana Valdés-Curiel has become Dr. ! Congratulations Ana.