Stuart Hadfield
Ph.D. Candidate
Office: 451 Computer Science Building
Office: 7LE5 Schapiro Center for Engineering and Physical Science Research (CEPSR)
Address: 530 West 120th Street, NY NY 10027
Email: stuartah (at) cs (dot) columbia (dot) edu
Home Page: http://www.cs.columbia.edu/~stuartah

About Me

I am a Ph.D. candidate in the Department of Computer Science at Columbia University, working in theoretical computer science. My advisors are Joseph F. Traub, Alfred V. Aho, and Anargyros Papageorgiou. Previously, I received a master's degree in computer science from Columbia, an honours degree in theoretical physics from the University of Melbourne (thesis completed on fault-tolerant quantum computation), and a bachelor's degree in engineering physics from the University of British Columbia. I have also worked in industry in both software and hardware engineering roles, specializing in embedded systems and performance optimization.

I am currently looking for employment/postdoctoral positions. Please contact me regarding any relevant opportunities.

Research Interests

I study quantum computation, algorithms, information, and complexity, with applications to problems in physics, chemistry, and engineering. We seek computational problems and results elucidating where quantum computers have demonstrable advantages over classical algorithms. I am further interested in the mathematical foundations of quantum physics and computation.

In particular, I am currently exploring the ability of quantum computers to provide practical and theoretical advantages for i) the simulation of physical systems and ii) approximately solving hard optimization problems.

Teaching

  • Spring 2015: COMS W4281 - Introduction to Quantum Computing (CVN Teaching Assistant / Guest Lecturer)
  • Fall 2014: COMS W3251 - Computational Linear Algebra (Teaching Assistant)
  • Spring 2014: COMS W4281 - Introduction to Quantum Computing (Teaching Assistant)
  • Summer 2013: SCE N0219 - Programming in C (Instructor)
  • Academic Year 2008: Physics Undergraduate Laboratory (Lab Instructor)
  • Research

  • On the Complexity of Hamiltonian Simulation (in preparation)
    Stuart Hadfield, Anargyros Papageorgiou

  • From the Quantum Approximate Optimization Algorithm to a Quantum Alternating Operator Ansatz (in preparation)
    Stuart Hadfield, Zhihui Wang, Bryan O'Gorman, Eleanor G. Rieffel, Davide Venturelli, Rupak Biswas
    Poster accepted to Southwest Quantum Information and Technology Workshop (SQuINT), Baton Rouge (2017)
    Talk accepted to APS March Meeting, New Orleans (2017)

  • Quantum Approximate Optimization with Hard and Soft Constraints (to appear)
    Stuart Hadfield, Zhihui Wang, Bryan O'Gorman, Eleanor G. Rieffel, Davide Venturelli, Rupak Biswas
    Proceedings of the 2nd International Workshop on Post Moore's Era Supercomputing, Denver (2017)

  • The Quantum Approximate Optimization Algorithm for MaxCut: A Fermionic View (in preparation)
    Zhihui Wang, Stuart Hadfield, Zhang Jiang, Eleanor G. Rieffel
    Poster accepted to Southwest Quantum Information and Technology Workshop (SQuINT), Baton Rouge (2017)

  • Divide-and-Conquer Approach for Quantum Hamiltonian Simulation (in preparation)
    Stuart Hadfield, Anargyros Papageorgiou
    Poster presented at Quantum Information Processing Conference (QIP), Seattle (2017)
    Talk given at APS March Meeting, New Orleans (2017)

  • Quantum Algorithms and Circuits for Scientific Computing
    Mihir K. Bhaskar, Stuart Hadfield, Anargyros Papageorgiou, Iasonas Petras
    Quantum Information and Computation. 16, no. 3&4 (2016): 197-236. (arXiv preprint)

  • Approximating Ground and Excited State Energies on a Quantum Computer
    Stuart Hadfield, Anargyros Papageorgiou
    Quantum Information Processing. 14.4 (2015): 1151-1178. (arXiv preprint)

  • Error Rate Thresholds for Physical Implementations of the Surface Code
    Stuart Hadfield
    Honours Thesis, School of Physics, University of Melbourne (2008)

    Links

    Google scholar, Arxiv, Research Gate, Publons, Linked In, Twitter