Abstract: Remember the saying “All models are wrong, but some are useful”. Well, some of the useful models can be made realistic by ingesting experimental measurements through data assimilation. This presentation will show examples of how Global Scale Observations of the Limb and Disk (GOLD) mission observations played a crucial role in improving a whole atmospheric reanalysis. The NSF-NCAR Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (WACCMX) model is used as the forecasting model and Data Assimilation Research Testbed (DART) ensemble adjustment Kalman filter is used for the assimilation. In addition to assimilation of GOLD disk temperature and O/N2 observation, lower atmospheric meteorological observations and temperatures from NASA-SABER and Aura-MLS are also assimilated to improve the atmosphere of the Earth from surface to the thermosphere-ionosphere altitudes. The addition of the GOLD observations in the assimilation improved the thermosphere-ionosphere in the whole atmosphere reanalysis. This presentation will demonstrate the great potential of the GOLD data to improve satellite drag and forecasting, which is becoming very crucial for space traffic control.
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May 2 | 4 - 5pm
FAZLUL LASKAR / LASP
LASP – Space Science Building, SPSC-W120 & Zoom
May 3 | 12:30 - 1:30pm
Oliver Hart / Dept of Physics, U. Colorado
Duane Physics Room G126
Abstract: Many-body quantum games provide a natural perspective on phases of matter in quantum hardware, crisply relating their properties to the securing of quantum advantage at a device-oriented task. These games can be viewed as generalizations of Bell tests, and they provide powerful and direct probes of quantum correlations that leverage the access to the entire wavefunction provided by quantum hardware. Previous studies have utilized many-body resource states in a fine-tuned manner, such that arbitrarily weak gate imperfections or noise will destroy any quantum advantage in the thermodynamic limit. In this talk, I will show how notions of topological order can be used to design multiplayer nonlocal games affording robust and scalable quantum advantage, which we explicitly verify in experiments carried out on Quantinuum's trapped-ion quantum processor H1-1.
May 6 | 10 - 11am
Brendan Marsh/Stanford
JILA X317
Abstract: Spin glasses—large-scale networks of spins with deeply frustrated interactions—are canonical examples of complex matter. Although much about their structure remains uncertain, they inform the description of a wide array of complex phenomena, ranging from magnetic ordering in metals with impurities to aspects of evolution, protein folding, climate models, and combinatorial optimization. Indeed, spin glass theory forms a mathematical basis for neuromorphic computing and brain modeling. Advancing experimental insight into their structure requires repeatable control over microscopic degrees of freedom. Here, we achieve this at the atomic level using a quantum-optical system comprised of ultracold gases of Rb atoms coupled via photons resonating within a multimode optical cavity. The network of atomic ensembles scatter light from a transverse pump laser into the cavity modes to realize an unusual type of transverse-field spin glass with all-to-all connectivity. A superradiant phase transition occurs upon reaching a critical pump strength, concomitant with spin glass ordering. Spin configurations are observed in the superradiant cavity emission and reveal the emergence of replica symmetry breaking and nascent ultrametric structure as signatures of spin-glass order. The controllability provided by this new spin-glass system, potentially down to the quantum-spin-level, enables the study of spin-glass physics in novel regimes with application to quantum neural network computing.
May 18 | 9:30 - 10:30am
Prof. Eric Cornell / Dept. of Physics & JILA, U. of Colorado Boulder
Duane Physics Room G1B30
Jun 29 | 9:30 - 10:30am
Prof. Andrew Hamilton / Dept. of Astrophysical & Planetary Sciences & JILA, U. of Colorado Boulder
Fiske Planetarium
Directory
Name (Group) | Email - Room |
---|---|
Peter A Lande (Raschke) |
peter.lande@colorado.edu |
Stefan Lannig (Ye) |
stefan.lannig@colorado.edu S155 |
Jackie LaPointe (Quantum Forge) |
jala9069@colorado.edu |
Braden Larsen (Thompson) |
braden.larsen@colorado.edu S155 |
Rachel Larsen (Kapteyn/Murnane) |
rachel.larsen-1@colorado.edu X230 |
Catherine K LeDesma (Anderson/Holland) |
cale7830@colorado.edu A406C |
Dahyeon Lee (Ye) |
dahyeon.lee@colorado.edu X220 |
Konrad W Lehnert (Helium Liquifier/Lehnert) |
lehnertk@jilau1.colorado.edu B241 |
Catherine Lei (Bohn) |
catherine.lei@colorado.edu S370 |
Hui Min Leung (Kapteyn/Murnane) |
huimin.leung@colorado.edu A509 |
River Leversee (Weber) |
river.leversee@colorado.edu S180 |
Joshua T Levin (Smith) |
joshua.t.levin@colorado.edu |
Judah Levine (Levine) |
jlevine@jila.colorado.edu S460A |
Heather Jean Lewandowski (Lewandowski/Quantum Forge) |
lewandoh@colorado.edu X435 |
Ben Lewis (Ye) |
ben.lewis-3@colorado.edu X220 |
Daniel E Lewis (Supply Office) |
delewis@jilau1.colorado.edu S175 |
Chuanlin Li (Raschke) |
chli6331@colorado.edu |
Hui Li (Bohn) |
hui.li@jila.colorado.edu S370 |
Na Li (Kapteyn/Murnane) |
na.li-1@colorado.edu X230 |
Yunhao Li (Kapteyn/Murnane) |
yunhao.li@colorado.edu X240 |
Qizhong Liang (Ye) |
qizhong.liang@colorado.edu X220 |
Chen-Ting Liao (Kapteyn/Murnane) |
chenting.liao@gmail.com A707 |
Karen Hansen Lichtfuss (Supply Office) |
karen.lichtfuss@jila.colorado.edu S175 |
Junyu Lin (Ye) |
junyu.lin@colorado.edu X220 |
Liang-Chun Lin (Raschke) |
lili9051@colorado.edu |
Sheng-Xiang Lin (Lehnert) |
sheng-xiang.lin@colorado.edu A309A |
Garrison Linn (Dessau) |
garrison.linn@colorado.edu |
Jeffrey L Linsky (Chair/Linsky) |
jlinsky@jila.colorado.edu A508 |
Joanna W Lis (Kaufman) |
joanna.lis@colorado.edu A610 |
Guangkuo Liu (Smith) |
guangkuo.liu@colorado.edu X324 |
Haixin Liu (Q-SEnSE) |
haixin.liu@colorado.edu X220 |
Jiayi Liu (Kapteyn/Murnane) |
jiayi.liu@colorado.edu A802 |
Lee R. Liu (Ye) |
lee.liu@colorado.edu X220 |
Qiaoyi Liu (Lewandowski) |
qili7958@colorado.edu C219 |
Timothy A Livingston Large (Nesbitt) |
timothy.livingstonlarge@colorado.edu S160 |
Kirk A Long (Dexter) |
kirk.long@colorado.edu A910 |
Paul Longfellow (JILA Facilities) |
paul.longfellow@colorado.edu S195 |
Yuchen Lou (Raschke) |
yuchen.lou@colorado.edu |
Theodor Lukin Yelin (Kaufman) |
theodor.lukinyelin@colorado.edu A603 |
Chengyi Luo (Thompson) |
chengyi.luo@colorado.edu A309 |
Wenjin Luo (Raschke) |
welu7305@colorado.edu |
Agnieszka K Lynch (Administration) |
a.lynch@jila.colorado.edu A304 |
Brian C Lynch (Supply Office) |
lynchb@jila.colorado.edu S177 |
Rui Lyu (Raschke) |
rui.lyu@colorado.edu |