Research Interests

Dissertation

Phase Transitions in Strongly Interacting Quantum Systems. pdf

Journal Publications & Manuscripts in Preparation

  1. Qingyou Meng, Christopher N. Varney, Hans Fangohr, and Egor Babaev,
    Phase diagrams of vortex matter with multi-scale inter-vortex interactions in layered superconductors.
    J. Physics.: Condens. Matter 29, 035602 (2017); link pdf arXiv
  2. Qingyou Meng, Christopher N. Varney, Hans Fangohr, and Egor Babaev,
    Honeycomb, square, and kagomé vortex lattices in superconducting systems with multi-scale inter-vortex interactions.
    Phys. Rev. B 90, 020509(R) (2014); link pdf arXiv
  3. Christopher N. Varney, Karl A. H. Sellin. Qing-Ze Wang, Hans Fangohr, and Egor Babaev,
    Hierarchical structure formation in layered superconducting systems with multi-scale inter-vortex interactions.
    J. Phys.: Condens. Matter 25, 415702 (2013); link pdf arXiv
  4. S. A. Kulagin, N. Prokof'ev, O. A. Starykh, B. Svistunov, and C. N. Varney,
    Bold Diagrammatic Monte Carlo Applied to Fermionized Frustrated Spins.
    Phys. Rev. Lett. 110, 070601 (2013); link pdf arXiv
  5. S. A. Kulagin, N. Prokof'ev, O. Starykh, B. Svistunov, and C. N. Varney,
    Bold Diagrammatic Monte Carlo technique for frustrated spin systems.
    Phys. Rev. B. 87, 024407 (2013); link pdf arXiv
    Editors' Suggestion.
  6. Christopher N. Varney, Kai Sun, Victor Galitski, and Marcos Rigol,
    Quantum Phases of Hard-Core Bosons in a Frustrated Honeycomb Lattice.
    New Journal of Physics 14, 115028 (2012) link pdf arXiv
  7. Christopher N. Varney, Kai Sun, Marcos Rigol, and Victor Galitski,
    Topological transitions for interacting finite systems
    Phys. Rev. B 84, 241105(R) (2011) link pdf arXiv Kindle
  8. Christopher N. Varney, Kai Sun, Victor Galitski, and Marcos Rigol
    Kaleidoscope of Exotic Quantum Phases in a Frustrated XY Model.
    Phys. Rev. Lett. 107, 077201 (2011). link pdf arXiv
    Viewpoint: Physics 4, 62 (2011). Editor's Suggestion.
  9. Simone Chiesa, Christopher N. Varney, Marcos Rigol, and Richard T. Scalettar
    Magnetism and pairing in two-dimensional trapped fermions
    Phys. Rev. Lett. 106, 035301 (2011). link pdf arXiv
    Selected for Virtual Journal of Atomic Quantum Fluids 3:5 (May, 2011) link
  10. Christopher N. Varney, Kai Sun, Marcos Rigol, and Victor Galitski
    Interaction effects and quantum phase transitions in topological insulators
    Phys. Rev. B. 82, 115125 (2010). link pdf arXiv
    Selected for Virtual Journal of Atomic Quantum Fluids 2:10 (October, 2010) link
  11. Christopher N. Varney, Simone Chiesa, Che-Rung Lee, Zhaojun Bai, and Richard T. Scalettar
    Quantum Monte Carlo Study of the two-dimensional fermion Hubbard Model
    Phys. Rev. B 80, 075116 (2009). link pdf arXiv
    Selected for Virtual Journal of Atomic Quantum Fluids 1:3 (September, 2009) link
  12. Christopher N. Varney, Valery G. Rousseau, and Richard T. Scalettar
    Quantum Monte Carlo study of the visibility of one-dimensional Bose-Fermi mixtures
    Phys. Rev. A 77, 041608(R) (2008). link pdf arXiv
  13. Helen A. Craig, Christopher N. Varney, Richard T. Scalettar, and Warren E. Pickett
    Static versus dynamic fluctuations in the one-dimensional extended Hubbard model
    Phys. Rev. B 76, 125103 (2007). link pdf arXiv
  14. Christopher N. Varney, Gus L. W. Hart, and Chris Wolverton
    A Coherency Strain Model for Hexagonal-Close-Packed Alloys
    TMS Lett. 1[2], 35 (2004). link pdf

Conference Publications

  1. C. Prayaga, A. Wade, C. N. Varney, L. Prayaga, and A. Whiteside
    A Robotic Interactive Learning Environment to Teach Physics
    EdMedia 2014: World Conference on Educational Media and Technology, Tampere, Finland, June 23-27 (2014) [Accepted]

Technical Reports

  1. C.-R. Lee, S. Chiesa, C. N. Varney, E. Khatami, Z. Bai, E. D'Azevedo, M. Jarrell, Th. Maier,
    S. Savrasov, R. T. Scalettar, and K. Tomko
    QUEST: QUantum Electron Simulation Toolbox
    SciDAC 2010 Conference, Chattanooga, Tennessee, July 11-15 (2010). Poster Preprint.

Invited Talks

  1. 28 Mar. 2013, University of West Florida, Pensacola, FL
    7 Mar. 2013, Youngstown State University, Youngstown, OH
    4 Feb. 2013, Illinois State University, Normal, IL
    Frontiers in Quantum Mechanics
  2. 21 Feb. 2013, Univeristy of Illinois, Urbana-Champaign, IL
    23 Jan. 2013, Lawrence Livermore National Lab, Livermore, CA
    Topological Phase Transitions
  3. 30 November 2012, Southern Connecticut State University, New Haven, CT
    Frontiers in Quantum Mechanics: Topological Insulators and Quantum Spin Liquids
  4. 17 October 2011, KTH Royal Institute of Technology, Stockholm, Sweden
    Kaleidoscope of Exotic Quantum Phases in a Frustrated XY Model
  5. 18 October 2011, KTH Royal Institute of Technology, Stockholm, Sweden
    13 October 2011, Universität Würzburg, Würzburg, Germany
    11 October 2011, RWTH Aachen University, Aachen, Germany
    Topological Phase Transitions for Finite Interacting Systems
  6. 11 March 2011, George Mason University, Fairfax, VA
    Quantum Phase Transitions in Topological Insulators and Quantum Spin Liquids
  7. 9 November 2010, University of Southern California, Los Angeles, CA
    22 October 2010, University of California, Santa Cruz, CA
    Interaction Effects and Quantum Phase Transitions in Topological Insulators
  8. 27 May 2010, University of California, Davis, CA
    Interaction Effects in Topological Insulators
  9. June 2008, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
    Bose-Fermi Mixtures in Optical Lattices and a Brief Overview of Graphene Nanoribbons

Contributed Talks

  1. 2012 APS March Meeting, Boston, MA
    Bose metal phase in a simple honeycomb lattice model
    Abstract pdf
  2. 2011 APS March Meeting, Dallas, TX
    Exotic quantum phases in a frustrated quantum spin model on a honeycomb lattice
    Abstract pdf
  3. 2010 APS March Meeting, Portland, OR
    Identifying Topological Phases in Real Space
    Abstract pdf
  4. 2009 APS March Meeting, Pittsburgh, PA
    High Precision QMC Study of the 2D Hubbard Model
    Abstract pdf
  5. 2008 APS March Meeting, New Orleans, LA
    Quantum Monte Carlo study of the visibility of one-dimensional Bose-Fermi mixtures
    Abstract pdf
  6. 2008 APS March Meeting, New Orleans, LA
    The FFLO Phase in Imbalanced Fermion Systems in 1D
    pdf
  7. 2007 APS March Meeting, Denver, CO
    Analysis of the Dynamical Cluster Approximation for the Triangular Lattice Hubbard Model
    Abstract pdf
  8. 2006 APS March Meeting, Baltimore MD
    A Quantum Monte Carlo Study of the Triangular Hubbard Model
    Abstract pdf
  9. 2004 APS March Meeting, Montreal, Quebec
    Strain Modeling for the Mg-CA and Mg-Y Binary Systems
    Abstract

Posters

  1. 2010 NSF Review of Joint Quantum Institute
    Interaction effects and quantum phase transitions in topological insulators
    pdf
  2. 2010 NSF Review of Physics Frontier Center
    Interaction effects and quantum phase transitions in topological insulators
    pdf