Mar 13, 2014: Prof. Lorenza Viola (Dartmouth College) on “Advances in quantum Hamiltonian engineering”

Abstract: Hamiltonian engineering via open-loop quantum control provides a versatile and experimentally validated framework for precisely manipulating a broad class of target dynamical evolutions of relevance to quantum science, with applications including dynamical decoupling and dynamically corrected quantum gates, noise spectroscopy, and quantum simulation. In this talk, I will present recent theoretical advances in tackling two representative problems motivated by quantum information processing. First, I will show how to employ dynamical decoupling methods for non-Markovian error suppression to achieve high-fidelity long-time quantum memory, subject to practical access-latency constraints and control limitations. Next, I will describe how to achieve Hamiltonian simulation in (closed as well as open) many-body quantum systems, by avoiding instantaneous control operations and using only realistic local control Hamiltonians with bounded-strength. Illustrative examples will be emphasized throughout.

“With the NSF’s generous support, which will combine with resources that MIT will devote as well as participation from a broad consortium of government and industry partners, we are going to tackle the educational and learning challenges in quantum information science with an innovative, interdisciplinary approach to training the new generation of QIS scientists and engineers.”

—Isaac Chuang, Director, iQuISE, and Associate Professor of Electrical Engineering and Associate Professor of Physics