Ryan Babbush

I'm a scientist at Google specializing in the development and simulation of efficient quantum algorithms for emerging analog and digital quantum hardware. Most of my research focuses on applications to problems in machine learning, optimization and chemistry simulation.

Google Publications

Previous Publications


    Bayesian Network Structure Learning using Quantum Annealing

    Bryan O'Gorman, Ryan Babbush, Alejandro Perdomo-Ortiz, Alán Aspuru-Guzik, Vadim Smelyanskiy

    European Physical Journal: Special Topics, vol. 224 (2015), pp. 163-188


    Chemical Basis of Trotter-Suzuki Errors in Quantum Chemistry Simulation

    Ryan Babbush, Jarrod McClean, Dave Wecker, Alán Aspuru-Guzik, Nathan Wiebe

    Physical Review A, vol. 91 (2015), pp. 022311


    Hamiltonian Gadgets with Reduced Resource Requirements

    Yudong Cao, Ryan Babbush, Jacob Biamonte, Sabre Kais

    Physical Review A, vol. 91 (2015), pp. 012315


    The Bravyi–Kitaev Transformation: Properties and Applications

    Andrew Tranter, Sarah Sofia, Jake Seeley, Michael Kaicher, Jarrod McClean, Ryan Babbush, Peter Coveney, Florian Mintert, Frank Wilhelm, Peter Love

    International Journal of Quantum Chemistry, vol. 115 (2015), pp. 1431-1441


    Adiabatic Quantum Simulation of Quantum Chemistry

    Ryan Babbush, Peter Love, Alán Aspuru-Guzik

    Scientific Reports, vol. 4 (2014), pp. 6603


    Construction of Energy Functions for Lattice Heteropolymer Models: Efficient Encodings for Constraint Satisfaction Programming and Quantum Annealing

    Ryan Babbush, Alejandro Perdomo-Ortiz, William Macready, Bryan O'Gorman, Alán Aspuru-Guzik

    Advances in Chemical Physics: Volume 155, Wiley (2014), pp. 201-243


    Exploiting Locality in Quantum Computation for Quantum Chemistry

    Jarrod McClean, Ryan Babbush, Peter Love, Alán Aspuru-Guzik

    Journal of Physical Chemistry Letters, vol. 5 (2014), pp. 4368-4380


    Force-Field Functor Theory: Classical Force-Fields which Reproduce Equilibrium Quantum Distributions

    Ryan Babbush, John Parkhill, Alán Aspuru-Guzik

    Frontiers in Chemistry, vol. 1 (2013), pp. 1-10


    Resource Efficient Gadgets for Compiling Adiabatic Quantum Optimization Problems

    Ryan Babbush, Bryan O'Gorman, Alán Aspuru‐Guzik

    Annalen der Physik, vol. 525 (2013), pp. 877-888


    Molecular Basis of the Mechanism of Thiol Oxidation by Hydrogen Peroxide in Aqueous Solution: Challenging the SN2 Paradigm

    Ari Zeida, Ryan Babbush, Mariano González Lebrero, Madia Trujillo, Rafael Radi, Darío A. Estrin

    Chemical Research in Toxicology, vol. 25 (2012), pp. 741-746