Congratulations to Xiao Chai for a successful PhD defense! His PhD thesis is entitled “Magnetic dynamics in nonequilibrium spinor Bose-Einstein condensates”.
Congratulations Dr. Xiao Chai!
//News
//New paper on tracking single atoms in a thermal ensemble without laser cooling December 2022
//https://arxiv.org/abs/2212.03970
We have isolated and tracked very slowly moving individual atoms without the aid of laser cooling. Passive filtering enabled us to carefully select atoms whose three-dimensional velocity vector has a magnitude below v¯/20, where v¯ is the mean velocity of the ensemble. Using a novel photon correlation technique, we could follow the three-dimensional trajectory of single, slowly moving atoms for >1μs within a 25μm field of view, with no obvious limit to the tracking ability while simultaneously observing Rabi oscillations of these single emitters. Our results demonstrate the power and scalability of thermal ensembles for utilization in quantum memories, imaging, and other quantum information applications through bottom-up approaches.
atomic beam is θ =47 ◦. Two cleaved fiber tips are placed on the image plane of the imaging system with a numerical aperture (NA) of 0.42. (b) The involved energy levels. The repump is detuned by ∆ to select a certain group of atoms. (c) The raw coincidences with different time delays from two
SPCMs at ∆ = −80 MHz, corresponding to a velocity of v ≈ 100m/s.
Congratulations Dr. Bochao Wei! Successful Ph.D. defense and graduation.
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Laser cooling on a chip August 2022
//A new paper from our group on the use of stimulated laser cooling to increase the brightness of chip-scale atomic beams for applications in quantum sensing and related technologies:
Congratulations to Dr. Chao Li!
//Congratulations to Raman Lab member Chao Li on a successful defense!
New PhDs!
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I’m very privileged to participate in the Ph.D.s hooding ceremony today for Raman Lab member Di Lao. Later this month we’ll celebrate Chao Li as well, who is defending. Congrats to these two fine scientists!