Blockchain researcher
Hi, I'm Tristan, Ph.D.
Introduction
Overview.
Acquiring my doctorate (PhD) in Physics at McGill University enforced my high attention to detail, sharpened my analytical reasoning, and gave me robust and extensive backgrounds in Mathematics, Statistics, Programming, and high-quality real-time research.
My professional journey has equipped me with research-grade proficiency in C++ , Fortran , and Python , and I have used these tools for a range of applications. My research at times involves the collection of extensive (~TB) datasets, and the efficient use of supercomputing resources, such as MPI , OpenMP , and CUDA , to extract and analyse the relevant information from the resulting data.
My abilities to utilise cutting-edge technology, to analyse and successfully execute solutions to complex problems, and my strong willingness to collaborate with my peers poises me as successful researcher.
Physicist
C++ Developer
Python Developer
Rust developer
Data scientist
What I've done so far
Experience.
Senior Research Engineer
Warlock Labs
- Performing research and developing strategies on reintermediating MEV and OEV
Product Developer
Flojoy
- Providing industry and research perspective on best practices and features for realistic customer use as a replacement of
LabVIEW - Creating custom applications for customers to seamlessly integrate existing and train new highly performant ML models, instrumentation, etc, into the new interface and product
Doctorate in Physics
McGill University
- Finite-element FDTD simulation design
- Relativistic space-charge electron beamline design and optimization
- Simulation and development of time-resolved electron energy loss spectroscopy (trEELS)
- Simulation and first-time realization of inelastic phonon-diffuse scattering on 2D materials
- First direct procedure developed to directly observe chiral phonons in 2D materials
- Developed the concept of polaron diffuse scattering
B.Sc. with Summa Cum Laude
Indiana University
- B.S. degrees in both Physics and Applied Mathematics.
- Neutron interferometry experiments
- Experimental fiber bundle computations
Research Assistant
Brookhaven National Lab
- OPERA cryogenic magnet design
- LEReC beamline design
- eRHIC target development
Research Assistant
Korea Advanced Institute of Science and Technology
- Dilusion refrigerator operation
- Cryogenic RF cavity design
- SQUID implementations
- COMSOL simulation
My links
Socials.
Feel free to check out my online socials for more details about me, my projects, or my publications.
Github
ORCID
My work
Publications.
A momentum-resolved view of polaron formation in materials
An ab-initio computational methodology for interrogating the phonon contribution to polaron formation in real materials is developed that can be directly compared to experiment. Using LiF as an example, we show that the recent ab-initio theory of Sio et. al [PRL 122, 246403 (2019)] makes predictions of the momentum- and branch dependent phonon amplitudes in polaron quasiparticles that are testable using ultrafast electron diffuse scattering (UEDS) and related techniques. The large electron polaron in LiF has UEDS signatures that are qualitatively similar to those expected from a simple isotropic strain field model, but the small hole polaron exhibits a profoundly anisotropic UEDS pattern that is in poor agreement with an isotropic strain field. We also show that these polaron diffuse scattering signatures are directly emblematic of the underlying polaron wavefunction. The combination of new time and momentum resolved experimental probes of nonequilibrium phonons with novel computational methods promises to complement the qualitative results obtained via model Hamiltonians with a first principles, material-specific quantitative understanding of polarons and their properties.
#polarons
#first principles
#density functional theory
Ultrafast phonon diffuse scattering as a tool for observing chiral phonons in monolayer hexagonal lattices
At the 2D limit, hexagonal systems such as monolayer transition metal dichalcogenides (TMDs) and graphene exhibit unique coupled spin and momentum-valley physics (valley pseudospin) owing to broken spatial inversion symmetry and strong spin-orbit coupling. Circularly polarized light provides the means for pseudospin-selective excitation of excitons (or electrons and holes) and can yield momentum-valley polarized populations of carriers that are the subject of proposed valleytronic applications. The chirality of these excited carriers have important consequences for the available relaxation/scattering pathways, which must conserve (pseudo)angular momentum as well as energy. One available relaxation channel that satisfies these constraints is coupling to chiral phonons. Here, we show that chiral carrier-phonon coupling following valley-polarized photoexcitation is expected to lead to a strongly valley-polarized chiral phonon distribution when this relaxation mechanism is dominant. This momentum valley phonon polarization is directly measurable using ultrafast phonon diffuse scattering techniques.
#chiral phonons
#monolayers
#density functional theory
Ultrafast phonon dynamics in atomically thin MoS2
Transition metal dichalcogenide monolayers and heterostructures are highly tunable material systems that provide excellent models for physical phenomena at the two-dimensional (2D) limit. While most studies to date have focused on electrons and electron-hole pairs, phonons also play essential roles. Here, we apply ultrafast electron diffraction and diffuse scattering to directly quantify, with time and momentum resolution, electron-phonon coupling (EPC) in monolayer molybdenum disulfide and phonon transport from the monolayer to a silicon nitride substrate.
#phonons
#monolayers
#density functional theory
Extreme lightwave electron field emission from a nanotip
We report on subcycle terahertz light-field emission of electrons from tungsten nanotips under extreme conditions corresponding to a Keldysh parameter γ≈. Local peak THz fields up to 40 GV/m are achieved at the apex of an illuminated nanotip, causing subcycle cold-field electron emission and acceleration in the quasistatic field. By simultaneous measurement of the electron bunch charge and energy distribution, we perform a quantitative test of quasistatic Fowler-Nordheim tunneling theory under field conditions that completely suppress the tunnel barrier. Very high bunch charges of ~ electrons/pulse are observed, reaching maximum energies of 3.5 keV after acceleration in the local field.
#electrons
#fdtd
#beamline
High-precision magnetic field measurement and mapping of the LEReC 180° bending magnet using very low field NMR with Hall combined probe (140-350 G)
The relativistic heavy ion collider (RHIC) at BNL uses low-energy RHIC electron cooling (LEReC) to conduct experiments to search for the quantum chromodynamic critical point. The first ever electron cooling based on the RF acceleration of electron beams was experimentally demonstrated on April 5, 2019 using LEReC at BNL.
#opera
#eRHIC
#LEReC
Fun facts
FAQs.
Feel free to check out my FAQs.
How did you get into physics?
My grandfather was a nuclear physicist in the US and UK, and so he gave me inspiration growing up. Once I developed an appreciation for being able to understand how everything (more or less) worked with physics, it was game over.
What simulation suites do you have experience in?
Over the years, I've developed experience in simulating a range of physical systems: heat transport, relativistic electron beams, charge transport, ultrafast phonon scattering, RF cavities, etc. They've relied on commercial products like COMSOL, ANSYS, and GPT, as well has home grown simulation suites.
For what language is it most worth suffering?
Hard number crunching has been my focus for a long time, so
C++ and Fortran have been taking the top spots. That being said, Rust is the language of the future, and is my primary focus in developing the MEV space.Get in touch