Lee J. O'Riordan

BSc (Hons), PhD

Research Computational Scientist, ICHEC

I completed my PhD with the Quantum Systems Unit at Okinawa Institute of Science and Technology Graduate University, Japan. I researched the control and manipulation of quantum states via theoretical and numerical methods, making use of GPU and HPC computing methods. Following this, I worked as a postdoctoral researcher in the Computational Crystallography Initiative at Lawrence Berkeley Lab, investigating the use of prototype exascale computing technologies for X-ray free-electron laser (XFEL) crystallographic analysis of bio-molecular systems. I currently hold the position of computational scientist with the Irish Centre for High-End Computing, exploring the use of near-term quantum computing technologies.

Interests

Quantum computation
Bose-Einstein condensates
High performance computing
Nonlinear dynamics
Computational & numerical /.*/

Education

PhD in Science (Physics), 2017

Okinawa Institute of Science and Technology Graduate University
BSc (Hons) in Physics with Computing, 2010

Waterford Institute of Technology

Experience

2019 – Present

Dublin, Ireland

Research Computational Scientist

Irish Centre for High-End Computing (ICHEC)

Exploring the use of quantum computing systems for natural language processing (NLP) tasks.

Presented work at both ISC 2019, Frankfurt, Germany, and Intel DevCon 2019, Denver Colorado.
Invited talk at QNLP 2019, Oxford. Talk (Youtube)

2018 – 2018

Okinawa, Japan

Visiting researcher

Okinawa Institute of Science and Technology Graduate University (OIST)

Collaborated on a study of chaotic dynamics in quantum superfluid systems. Work available at https://arxiv.org/abs/1812.04759.
Further developed and generalised the Bose–Einstein simulation suite GPUE. Published in the Journal of Open Source Software as GPUE: Graphics Processing Unit Gross–Pitaevskii Equation solver.

2017 – 2018

Berkeley, CA, USA

Postdoctoral fellow

Lawrence Berkeley National Laboratory

Researcher involved the ExaFEL project. Responsibilities included:

Building a Docker-enabled pipeline for deployment at NERSC.
Integration of STRUMPACK distributed sparse linear-algebra package for crystal parameter fitting.
Scalability and bottle-neck investigations of the software at scale.
Real-time data analysis and feedback during protein crystallography experiments.
Implementing OpenMP and MPI parallelised algorithms.

Code contributions available at CCTBX, DIALS, ExaFEL Project.
Results leading to publications: 2018, 2019

2012 – 2017

Okinawa, Japan

PhD student

Okinawa Institute of Science and Technology Graduate University (OIST)

Researched cold atomic systems, which specific emphasis on the non-equilibrium dynamics of vortex lattice carrying Bose–Einstein condensates. Works and responsibilities included:

Thesis: Non-equilibrium vortex dynamics in rapidly rotating Bose-Einstein condensates
Developed GPUE (modern,original), a software suite for simulating linear and nonlinear Schrödinger equation dynamics. The work was used largely to investigate vortex behaviour in Bose–Einstein condensates.
Responsible for HPC-related interactions between the lab and university.
Chair of the OIST Student Assembly (2015-2016).

See publications for a list of published works.

2011 – 2012

Cork, Ireland

Research assistant (PhD student)

University College Cork (UCC)

Transfered to OIST with Prof. Busch after completing first year of PhD programme.

2010 – 2011

Dublin, Ireland

Software developer

IBM, Dublin Software Labs

Developer on IBM Solution Installer, used for installing server-side applications with WebSphere Portal platform.
Experience using Java, J2EE, XML, XSLT, Ant, Shell scripting, JDBC, Python, C.
Deployed and maintained WebSphere Portal, Lotus Sametime, and Lotus Connections software stacks for development and testing.

2009 – 2009

Limerick, Ireland

Product engineer (intern)

Analog Devices

Analysed and assisted in trouble-shooting of die failures.
Trained in operation of light-emission microscopy (LEM), optical beam-induced resistance change (OBIRCH) methods, focussed ion beam (FIB) and scanning electron microscope (SEM) equipment.
Programmed wafer data analysis and input automation routines in BASH, C, and VB.

Recent Publications

More Publications

Photoreversible interconversion of a phytochrome photosensory module in the crystalline state

E Sethe Burgie, Jonathan A Clinger, Mitchell D Miller, Aaron S Brewster, Pierre Aller, Agata Butryn, Franklin D Fuller, Sheraz Gul, Iris D Young, Cindy C Pham, In-Sik Kim, Asmit Bhowmick, Lee J. O’Riordan, Kyle D Sutherlin, Joshua V Heinemann, Alexander Batyuk, Roberto Alonso-Mori, Mark S Hunter, Jason E Koglin, Junko Yano, Vittal K Yachandra, Nicholas K Sauter, Aina E Cohen, Jan Kern, Allen M Orville, George N Phillips, Richard D Vierstra

URL

Chaotic few-body vortex dynamics in rotating Bose--Einstein condensates

Tiantian Zhang, James Schloss, Andreas Thomasen, L. J. O’Riordan, Thomas Busch, Angela White

URL arXiV

GPUE: Graphics Processing Unit Gross--Pitaevskii Equation solver

James R. Schloss, L. J. O’Riordan

URL