William Parker

Computational Postdoctoral Fellow

Argonne National Laboratory
Material Science Division
9700 South Cass Avenue
Argonne, Illinois 60439
U.S.A.
+1 (630)252-1775

Education

Ph.D. in Physics, the Ohio State University, December 2010 (thesis: Speeding Up and Quantifying Approximation Error in Continuum Quantum Monte Carlo Solid-State Calculations)
B.S. Physics, B.A. Astronomy, University of Texas at Austin, May 2002

Research Experience

• Computational Postdoctoral Fellow, autumn 2010 - present
  Argonne National Laboratory
  High-performance computing calculation of phonons with density-functional perturbation theory
• Graduate Research Associate, autumn 2004 - summer 2010
  the Ohio State University
  Quantum Monte Carlo simulations of solids (advisor: John Wilkins)
• Fourth Quarter Graduate Research Associate, summer 2003, 2004
  the Ohio State University
  Quantum Monte Carlo simulations of solids
• Undergraduate Research Assistant, spring 2002
  University of Texas at Austin
  Carbon nanotube growth and detection (supervisor: Zhen Yao)
• Senior Thesis, fall 2001 - spring 2002
  University of Texas at Austin
  Classical hydrogen atom in circularly-polarized laser field computational modeling (supervisor: Linda Reichl)
• Programmstudent, summer 2001
  Bayerische Julius-Maximilians-Universität Würzburg
  Bromine-alcohol solution etching rates on ZnSe (advisor: Georg Schmidt)
• Summer Research Student, summer 1996
  University of North Texas
  Invisible Companion to 70 Ophiuchi B (advisor: James Roberts)

Teaching Experience

• Graduate Teaching Associate, autumn 2002 - spring 2003, autumn 2003 - spring 2004
  the Ohio State University
  Physics 106(physics by inquiry), 131(mechanics), 132(electricity and magnetism)
• Volunteer English Class Instructor, autumn 2002 - summer 2005
  Columbus Ohio Institute of Religion
  Advanced and Intermediate Conversational English
• English Tutor, January 2001 - May 2002
  private
  Instruction in English pronunciation and grammar

Employment (outside of research and teaching experience)

• Intern
  International Business Machines - Alphaworks - Sashscript Development Team
  Wrote technical documentation and sample weblications for Sashscript
• Technical Support
  Unicomp Technologies, Ltd.
  Resolved dial-up internet customer's problems and supported programming team's non-programming technical needs
• Part-time Employee
  Braum's Inc.
  Filled customer orders, stocked supplies, cleaned store

Publications

W. D. Parker, J. M. Rondinelli and S. Nakhmanson, First-principles study of misfit strain-stabilized ferroelectric SnTiO₃, Physical Review B 84, 245126 (2011).

W. D. Parker, J. W. Wilkins and R. G. Hennig, Accuracy of Quantum Monte Carlo Methods for Point Defects in Solids, physica status solidi b 248, 267 (2010)(arXiv version).

R. G. Hennig, A. Wadehra, K. P. Driver, W. D. Parker, C. J. Umrigar and J. W. Wilkins, Phase transformation in Si from the semiconducting diamond to the metallic β-Sn phase in QMC and DFT under hydrostatic and anisotropic stress, Physical Review B 82, 014101 (2010)(arXiv version).

W. D. Parker, C. J. Umrigar, R. G. Hennig, D. Alfè and J. W. Wilkins, Comparison of polynomial approximation to speed up plane-wave-based quantum Monte Carlo calculations, submitted to Physical Review B.

E. Okon, W. Parker, W. Chism and L. E. Reichl, "Chaotic scattering from hydrogen atoms in a circularly polarized laser field", Physical Review A 66, 53406 (2002).

Conferences and Specialized Schools

APS 2011 March Meeting Probing Ferroelectricity in Thin-film Perovskite SnTiO₃ with First-principles Structural Instability Analysis (slides [PDF])

APS 2009 March Meeting Quantum Monte Carlo calculates bulk properties and magnetic ordering in iron (slides [PDF])

20th Annual Workshop on Recent Developments in Electronic Structure Methods New density functional and backflow transformation applied to Si interstitial defects (poster [PDF])

APS 2008 March Meeting Backflow transformation improves QMC calculations of silicon self-interstitial defects (slides [PDF])

CECAM Advances in Continuum Quantum Monte Carlo Methods Workshop

UIUC 2007 Summer School on Computational Materials Science: Quantum Monte Carlo from Minerals and Materials to Molecules

19th Annual Workshop on Recent Developments in Electronic Structure Methods Speeding Up Plane-wave-based Quantum Monte Carlo Calculations (poster [PDF])

APS 2007 March Meeting Faster QMC with Lagrange and Splines (slides [PDF])

18th Annual Workshop on Recent Developments in Electronic Structure Methods Testing Approximations in Quantum Monte Carlo on Silicon Single Self-interstitial Defects (poster [PDF])

APS 2006 March Meeting Energy Optimization of Many-Body Wave Functions: Application to Silicon Interstitial Defects (slides [PDF])

17th Annual Workshop on Recent Developments in Electronic Structure Methods Diffusion Monte Carlo Study of Single-, Di- and Tri-Interstitials in Silicon (poster [PDF])

Joint DEMOCRITOS-ICTP School on Continuum Quantum Monte Carlo Methods

William Parker
Department of Physics
the Ohio State University
Created by: wparker at mps dot ohio dash state dot edu
Last Modified: