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.

“There is widespread belief that fundamental ideas from QIS will lead to useful new information technology, and provide computing, communication, and control systems beyond the limits of traditional paradigms. These carry with them profound social implications. This is why iQuISE will incorporate education in ethics and social context.”

–Jeffrey H. Shapiro, Co-Director, iQuISE, and Julius A. Stratton Professor of Electrical Engineering and Director, Research Laboratory of Electronics