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Yao-Lung (Leo) Fang

Assistant Computational Scientist


  • Quantum Information Science
  • High-performance/high-throughput/parallel computing
  • Scientific code optimization and GPU acceleration
  • Computational physics
  • Quantum optics
  • Condensed matter physics

Computational Sciences Research Activities

  • Parallelized delay partial differential equation (PDE) solver with OpenMP and POSIX Threads (pthreads)
  • GPU-accelerated X-ray ptychography reconstruction for NSLS-II hard X-ray nanoprobe (HXN) beamline


  • Ph.D., Physics, Duke University
  • M.S., Electrical and Computer Engineering, Duke University
  • B.S., Physics, National Taiwan University, Taipei, Taiwan

Professional Appointments

Brookhaven National Laboratory

  • 2019-Present, Assistant Computational Scientist, Quantum Computing Group, Computational Science Initiative
  • 2018-2019, Research Associate, Computational Science Initiative

Selected Publications & Research Highlights

D. Wysocki, R. O’Shaughnessy, J. Lange, and Y.-L. L. Fang, Accelerating parameter inference with graphics processing units, arXiv: 1902.04934 (accepted by Phys. Rev. D)

G. Calajó, Y.-L. L. Fang, H. U. Baranger and F. Ciccarello, Exciting a Bound State in the Continuum through Multi-Photon Scattering plus Delayed Quantum Feedback, Phys. Rev. Lett. 122, 073601 (2019)

X. Huang et al., Resolving 500 nm Axial Separation by Multi-slice X-ray Ptychography, Acta Cryst. A 75, 336 (2019)

Y.-L. L. Fang, FDTD: Solving 1+1D Delay PDE in Parallel, Comput. Phys. Commun. 235, 422 (2019)

Y.-L. L. Fang, F. Ciccarello and H. U. Baranger, Non-Markovian Dynamics of a Qubit Due to Single-Photon Scattering in a Waveguide, New J. Phys. 20, 043035 (2018)

Z. Dong, Y.-L. L. Fang et al., High-Performance Multi-Mode Ptychography Reconstruction on Distributed GPUs, 2018 NYSDS, DOI: 10.1109/NYSDS.2018.8538964 (co-first author)

Y.-L. L. Fang and H. U. Baranger, Multiple Emitters in a Waveguide: Non-Reciprocity and Correlated Photons at Perfect Elastic Transmission, Phys. Rev. A 96, 013842 (2017)

Y.-L. L. Fang and H. U. Baranger, Photon Correlations Generated by Inelastic Scattering in a One-Dimensional Waveguide Coupled to Three-Level Systems,Physica E 82, 71 (2016)

Y.-L. L. Fang and H. U. Baranger, Waveguide QED: Power spectra and correlations of two photons scattered off multiple distant qubits and a mirror, Phys. Rev. A 91, 053845 (2015)

Y.-L. L. Fang, H. Zheng and H. U. Baranger, One-Dimensional Waveguide Coupled to Multiple Qubits: Photon-Photon Correlations, EPJ Quantum Technology 1, 3 (2014)