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Los Alamos Distinguished Postdoc Fellows

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Meet the Lab's Current Distinguished Postdoctoral Fellows

Los Alamos National Laboratory Distinguished Fellows (pdf)

Andrea Albert

Hoffman Distinguished Postdoctoral Fellow
Physics Division: Neutron Science and Technology Group (P-23)


Education: Ph.D. and M.S in Physics - Ohio State University;
B.S. in Astrophysics and Religious Studies - Rice University.

Research: Andrea is interested in studying the fundamental forces and particles that govern the physical laws of the Universe. In the growing field of particle astrophysics, the entire Universe is our laboratory to study particle interactions in extreme cosmic environments unobtainable in terrestrial labs. Andrea is specifically interested in detecting high-energy gamma rays produced in known non-thermal processes and new exotic mechanisms like particle dark matter interactions. We know 85% of the mass in the Universe is not the baryonic matter that is well-described by the Standard Model of particle physics. Many theoretically- and observationally-motivated models predict that dark matter may be a particle that can annihilate or decay, producing gamma rays that we can detect.

Bio: Andrea's research interests have always included particle detectors and astrophysics. She did her Ph.D. studies with Dr. Brian Winer and Dr. Richard Hughes looking for faint gamma-ray signals from particle dark matter interactions using the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope (Fermi). She continued this work as a postdoc at SLAC National Accelerator Laboratory where she was promoted to Dark Matter New Physics (DMNP) working group coordinator within the Fermi-LAT Collaboration. Andrea has led collaborative efforts emphasizing close, careful, and critical examination of potential dark matter signals. "Extraordinary claims require extraordinary evidence", and so far no robust dark matter signals have been seen by the Fermi LAT. Andrea will be working with her mentor Dr. Brenda Dingus on the newly completed HAWC Observatory, which observes gamma rays 100 times more energetic than those seen by Fermi. She will continue as a coordinator within the Fermi-LAT Collaboration while also studying a new high-energy regime with HAWC. Andrea is passionate about science outreach and has shared her excitement for physics with many audiences from elementary school classrooms to public lectures to congressional offices. You can learn more about her outreach efforts at www.physics-andrea.com

Francesco Caravelli

Oppenheimer Distinguished Postdoctoral Fellow
Theoretical Division, Physics of Condensed Matter Complex Systems (T-4)


Education: Ph.D. in Physics-University of Waterloo;
M.S. and B.S. in Physics-University of Pisa

Research: Francesco is interested in non-equilibrium statistical mechanics and in particular in neuromorphic circuits. He has recently focused on the properties of memristors and their collective behavior. Memristors are 2-port passive devices, which have characteristics similar to a resistance, but exhibit a very nonlinear behavior. Neuromorphic circuits are, in general, interesting for many reasons. These provide in fact a valid alternative to the von Neumann architecture at the classical level (analog computation), in particular in view of the need of building circuits which can serve as brain-computer interface. His interest is in particular in the relaxation properties of the circuits under various conditions (AC or DC controlled), exact solutions and the use of statistical mechanics to understand their asymptotic behavior. In particular, in collaboration with Massimiliano Di Ventra and Fabio L. Traversa he derived an exact equation for the internal memory dynamics of purely memristive circuits. This equation allows to treat the system as a pseudo-spin model. With his mentor at Los Alamos National Laboratory, Cristiano Nisoli, he will explore the kinetic behavior of artificial spin ice and its memory features.

Bio: Francesco began studying Quantum Gravity as a PhD student, but moved to Complex Systems after he completed his thesis in “Quantum Pre-Geometry models for Quantum Gravity”. He then got interested in the properties of dynamical graphs and in statistical mechanics. He has a broad range of interests: from percolation phenomena to econophysics and power grids, although always interested in the dynamical aspects. Before arriving at Los Alamos National Laboratory, Francesco has been a postdoc joint between the Santa Fe Institute and OCIAM Oxford with Doyne Farmer, a researcher at UCL with Francesca Medda and a Senior Researcher at Invenia Labs in Cambridge.

Lukasz Cincio

Oppenheimer Distinguished Postdoctoral Fellow
Theoretical Division, Physics of Condensed Matter Complex Systems (T-4); Materials Physics Applications Division, Condensed Matter Magnet Science (MPA-CMMS)


Education: Ph.D. and MSc in Physics/Astronomy & Applied Computer Science – Jagiellonian University; MSc in Mathematics – Jagiellonian University.

Research: Lukasz Cincio's research interests lie at​​ the interface between Condensed Matter Physics and Quantum Information Theory.​ Lukasz is studying how local interactions between many particles can give rise to large scale, emergent phenomena. In particular, he is interested in topological order, one of the most striking examples of such phenomena in quantum physics. Topological order supports anyons - exotic particles that may become a core ingredient of a revolutionary topological quantum computer. To tackle problems in​ that field, Lukasz is developing numerical algorithms based on tensor networks - a recent breakthrough in computational quantum many-body physics.

Bio: Lukasz is co-mentored by Wojciech Zurek (T-4) and Filip Ronning (MPA-CMMS). During his studies, he was working on strongly correlated systems under the supervision of prof. Jacek Dziarmaga. During his studies, he also cooperated with prof. Wojciech Zurek (Los Alamos National Laboratory) and prof. Maciej Lewenstein (ICFO). Later he joined Perimeter Institute for Theoretical Physics in Canada as a postdoc and worked on numerical algorithms for quantum many-body physics in collaboration with prof. Guifre Vidal. His work included proposing and testing realistic models for an exotic quantum state of matter, called chiral spin liquid. Results of his research have been published in renowned journals.

Arianna Gleason

Reines Distinguished Postdoctoral Fellow
Weapons Experiments Division, Shock and Detonation Physics (M-9) Group

Arianna Gleason, Reines Distinguished Postdoc

Education: Ph.D. in Mineral Physics and Earth Sciences - University of California, Berkeley;
B.S. in Geophysics and Planetary Science - University of Arizona.

Research: Arianna Gleason’s research interests lie in understanding the mechanisms behind the phase transitions and material strength at extreme conditions.

Bio: Arianna is co-mentored by Cindy Bolme (WX-9) and Prof. Wendy Mao, Stanford University. Arianna started conducting scientific research in 1998 on asteroid/comet detection and discovery with the group Spacewatch at the University of Arizona. During her Ph.D. studies, Arianna explored the elasticity and plasticity of Earth-relevant materials at extreme conditions using static compression techniques (i.e., diamond anvil cells) combined with synchrotron sources to help interpret Earth’s seismic information and provide insight into the evolution of the Earth’s interior. During her early postdoctoral work, in collaboration with Lab staff, she conducted experiments using the Linac Coherent Light Source at SLAC National Accelerator Laboratory providing direct observation of material structure during phase transformation with femtosecond time resolution – allowing unprecedented measurements of transition kinetics, including grain nucleation and growth rates a extreme conditions. In 2014, she received the Early Career Award in Mineral and Rock Physics from the American Geophysical Union.

Jessica Goodman

Feynman Distinguished Postdoc Fellow
Theoretical Division: Nuclear and Particle Physics, Astrophysics and Cosmology (T-2)


Education: Ph.D. and M.S. in Physics - University of California, Irvine
B.S. in Physics and Mathematics - University of Arizona

Research: While the Standard Model has been amazingly successful in describing fundamental interactions of particle physics, many questions remain unexplained. The recent discovery of the Higgs particle exacerbates one of these issues: why is the Higgs mass so light? This is known as the hierarchy or fine tuning problem. Additionally, astrophysical data provide us with strong, albeit indirect, evidence for the existence of dark matter. However it is clear that no Standard Model particle can completely fill this role. Jessica’s research interests lie in addressing these and other questions in Beyond the Standard Model Particle Physics.

More specifically, Jessica is currently considering general extensions of the Higgs sector. Quantum field theory tells us that we cannot add a scalar field with arbitrary isospin and hypercharge to the Standard Model. The size of a new Electroweak field is bound by perturbative unitarity. Given this, she is working on constraining the model space of extended Higgs sectors using Electroweak precision observables. This will place general limits on new physics participating in Electroweak symmetry breaking.

Additionally, Jessica is exploring new methods to allow for larger coverage of dark matter model space for collider applications beyond effective operators. The different types of dark matter experiments probe different dark matter-Standard Model interactions; effective operators allow one to translate between these different types of detection. Based on work she did as a graduate student, much experimental collaboration now present their constraints in the language of effective theories. However, it has become increasingly clear that not all effective theories correspond to sensible theories at collider energies; and simplified models are being explored as a way around this breakdown. But, simplified models are non-generic and may rely on assumptions with no physics motivation. By comparing loop to tree completions of effective operators one can gain a better understanding of how inclusive simplified models are.

Background: Jessica did her Ph.D. studies under the guidance of Prof. Yuri Shirman. As a graduate student, she mostly focused on dark matter and models of supersymmetry breaking. Prior to joining the Lab as a Feynman Fellow, Jessica held two postdoc positions. After obtaining her Ph.D., she joined the Center for Cosmology and Astroparticle Physics at The Ohio State University as a postdoc working with Prof. Linda Carpenter. Most recently, she worked as a member of the Particle Theory Group in the physics department at Carleton University.

Ari Le

Feynman Distinguished Postdoctoral Fellow
X Computational Physics Division, Plasma Theory and Applications (XCP-6)

Ari Le, Feynman Postdoctoral Fellow

Education: Ph.D. in Physics - Massachusetts Institute of Technology;
BA in Physics, French, and Math - Brown University.

Research: Ari’s main research focus involves plasma kinetic effects, processes that occur on small scales outside the scope of typical fluid models. His computational work has applications to space plasmas and laboratory experiments, including those on inertial confinement fusion.

Bio: Ari is co-mentored by Bill Daughton, Andrei Simakov, and Tom Kwan. His doctoral research, performed under the direction of Prof. Jan Egedal, focused on magnetic reconnection, which heats and accelerates plasmas in a variety of space and astrophysical systems. He spent two years as a postdoc in the space plasma simulation group at UCSD, as well as half a year as a NASA-funded research scientist at the Space Science Institute. He joined the Lab in 2015 as a Director's Postdoc Fellow prior to receiving the Distinguished Postdoc Fellow appointment. His current research interests include kinetic simulations, magnetic reconnection, inertial fusion, and plasma shocks and turbulence.​

Duff Neill

Feynman Distinguished Postdoc Fellow
Theoretical Division: Nuclear and Particle Physics, Astrophysics and Cosmology (T-2)

duff neill picture by pond

Education: Ph.D. in Physics - Carnegie Mellon University;
B.A. in Physics - University of Chicago.

Research: Duff's research focuses on understanding the behavior of quantum chromodynamics (QCD) in high energy collisions, such as found at the Large Hadron Collider or the Relativistic Heavy Ion Collider. He develops methods to resume the perturbation series that describes the scattering processes at the shortest distances in these collisions, enabling precise predictions for experiments, as well as developing ways to describe how non-perturbative contributions can be captured by universal functions measurable in many different experiments. Moreover, he is always on the lookout for interesting effective field theories in diverse physics contexts.

Bio: After completing his PhD, he joined the Massachusetts Institute of Technology's Physics Department as a Pappalardo Fellow, a self-directed research fellowship. In 2016, he joined the Lab as a Director's Postdoctoral Fellow, before becoming a Distinguished Feynman Postdoctoral Fellow.

Andrey Sadofyev

Oppenheimer Distinguished Postdoc Fellow
Theoretical Division: Nuclear and Particle Physics, Astrophysics and Cosmology (T-2)


Education: Ph.D. in Physics - MIT;
M.S. and B.S. in Physics – Moscow Institute of Physics and Technology

Research: Andrey is interested in dynamics of quark-gluon plasma (QGP): a novel state of matter produced in experiments on heavy ion collisions. Currently, his work is focused on non-perturbative phenomena and strongly coupled dynamics in quantum chromodynamics at finite temperatures and densities. In particular, Andrey’s research relies on the rapidly developing tool of holographic duality, which relates higher-dimensional gravity and a strongly coupled gauge theory in one lower dimension.  Combining various approaches, this research provides theoretical insights helping to understand the details of QGP behavior that is seen in experiments.

Bio: Andrey started his scientific research as an undergraduate under the supervision of Valentine I. Zakharov at the Institute for Theoretical and Experimental Physics, Moscow. He then completed his Ph.D. studies under the guidance of Krishna Rajagopal.

Samantha Schrell

Hoffman Distinguished Postdoc Fellow
Chemistry Division: Inorganic, Isotope, and Actinide Chemistry (C-IIAC)

Samantha Schrell

Education: Ph.D. in Inorganic Chemistry-Florida State University;
B.S. in Chemistry-Ithaca College.

Research: Samantha is currently working in area of actinide chemistry. Specifically she is interested in exploring how to control covalency in actinide-ligand bonding. Covalency is a fundamental concept in chemistry used to describe chemical bonding in s-, p-, d-, and f-block elements. Many studies indicate that covalency is closely correlated with the chemical and physical properties for with many d-block transition metal complexes. Whether the f-block elements engage in covalent bonding has been heavily debated for decades. Unraveling the nature of covalent bonding for actinides remains a computational and experimental challenge. These efforts can directly impact actinide separations, coordination chemistry, solid-state synthesis, and superconductivity.

Bio: Samantha Schrell (formally Samantha Cary) received her Ph.D. under the guidance of Professor Thomas Albrecht-Schmitt. Her thesis focused on studying the structure and bonding of late actinide systems. During this time Schrell developed proficiency in handling large (mg scale) quantities of Np, Pu, Am, Cm, Bk, and Cf in support of the coordination chemistry studies associated with her thesis. In 2015 she received the Innovations in Fuel Cycle Research Awards sponsored by the U.S. Department of Energy for her work with californium. In 2016, she joined the lab as an Agnew National Security Postdoctoral Fellow, before becoming a Hoffman Distinguished Postdoctoral Fellow.

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