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James Gubernatis

T-11 Technical Staff Member
T-11/CNLS

Computational Physics

James Gubernatis

Office: TA-03, Bldg. 0524, Rm. 140
Mail Stop: B262
Phone: (505) 667-6727
Fax: (505) 665-4063

jg@lanl.gov

Summary of Present Research Interests

Jim's research interests fall under the rubric of computational physics, with concentrated interests in the development of Monte Carlo algorithms for simulating quantum systems and the applications of such algorithms to strongly correlated electron systems. Current projects include the development of classical and quantum Monte Carlo methods for computing a few extremal eigenpairs of matrices whose orders are so large that the eigenvectors are too large to store in the memory of a computer and the numerical determination of the ground state symmetries of strongly correlated electron models of lanthanide and actinide materials. Types of ground states of interest include ferroelectric, anti-ferromagnetic, and ferromagnetic. Jim is the United States Representative and Secretary of the Commission of Computational Physics of the International Union of Pure and Applied Physics (IUPAP).

Educational Background/Employment:
  • 1967 B.S. in Physics, Loyola College (MD)
  • 1969 M.S. in Physics, Case Western Reserve University
  • 1972 Ph.D. in Physics, Case Western Reserve University (Thesis Title: Properties of Disordered Systems, Advisor: P. L. Taylor)
  • Postdoctoral Research:
    • 1973-74, Postdoctoral Research Associate, Cornell University (Mentor: J. A. Krunhansl)
  • Employment:
    • 1972-1973, Assistant Professor, Ohio Northern University
    • 1973-74, Postdoctoral Research Associate, Cornell University
    • 1974-75, Research Associate II, Cornell University
    • 1975-1981, Staff Member, Los Alamos National Laboratory
    • 1981-1982, Acting Group Leader, Los Alamos National Laboratory
    • 1981-1984, Deputy Group Leader, Los Alamos National Laboratory
    • 1984-Present, Staff Member, Los Alamos National Laboratory

Research Interests:

  • Computational Physics
  • Condensed-Matter Physics
  • Quantum Computing

Selected Recent Publications:

  1. Direct Observation of Itinerant Magnetism in the 5f-Electron System UTe, T. Durakiewicz, C. D. Batista, J. D. Thompson, C. G. Olson, J. J. Joyce, G. H. Lander, J. E. Gubernatis, E. Guziewicz, M. T. Butterfield, A. J. Arko, J. Bonca, K. Mattenberger, and O. Vogt Phys. Rev. Lett. 93, 267205 (2004)
  2. Intermediate Coupling Theory of Electronic Ferroelectricity, C. D. Batista, J. E. Gubernatis, J. Bonca, and H. Q. Lin Phys. Rev. Lett. 92, 187601 (2004)
  3. Segmented Band Mechanism for Itinerant Ferromagnetism, C. D. Batista, J. Bonca, and J. E. Gubernatis Phys. Rev. Lett. 88, 187203 (2002)
  4. Simulating physical phenomena by quantum networks, R. Somma, G. Ortiz, J. E. Gubernatis, E. Knill, and R. Laflamme Phys. Rev. A 65, 042323 (2002)
  5. Unveiling order behind complexity: Coexistence of ferromagnetism and Bose-Einstein condensation, C. D. Batista, G. Ortiz, and J. E. Gubernatis Phys. Rev. B 65, 180402 (2002)
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