Tuesday, November 12, 2013
Institute for Quantum Information Seminar
Exponential Improvement in Precision for Hamiltonian-Evolution Simulation
Rolando Somma, Los Alamos National Laboratory
I will present a quantum method for simulating Hamiltonian evolution with complexity polynomial in the logarithm of the inverse error. This is an exponential improvement over existing methods for Hamiltonian simulation. In addition, its scaling with respect to time is close to linear, and its scaling
with respect to the time derivative of the Hamiltonian is logarithmic. These scalings improve upon most existing methods. Our method is to use a compressed Lie-Trotter formula, based on recent ideas for efficient discrete-time simulations of continuous-time quantum query algorithms.
This is joint work with Dominic Berry and Richard Cleve