Quantum Institute: Visitor Schedule

The Quantum Lunch is regularly held on Thursdays in the Theoretical Division Conference Room, TA-3, Building 123, Room 121. For more information, contact Diego Dalvit.

April 24, 2007
Tuesday, 1:00 PM

Lorenza Viola,
Dartmouth College

(Some) Principles and Applications of Quantum Information Control: Toward a Subsystem-Theoretic Approach

Abstract

Developing theoretical and practical methodologies for accurately controlling quantum dynamics is a challenge of growing significance across contemporary physics, engineering, and quantum information science. In spite of intensive effort, a host of challenges remain in devising and validating approaches for control design and analysis able to address "complex" dynamical regimes as typically encountered in realistic scenarios. In this talk, I will focus on stabilization problems for both quantum dynamics and quantum states in two distinct complementary settings: open-loop dynamical decoupling methods for non-Markovian quantum evolutions, and continuous-time output-feedback for Markovian master equations. In particular, I will survey recent results on high-level deterministic and randomized dynamical decoupling schemes [1] and their application to electron spin coherence control in semiconductor quantum dots [2], as well as outline Markovian feedback-control strategies for quantum pure state stabilization and noiseless subspace synthesis [3].