2013 Kavli Fellow
2009-2010 Blanchard Assistant Professor of Chemistry
1998-2003 John and Fannie Hertz Fellow
2001 Institute for Theoretical Physics Graduate Fellow, UC-Santa Barbara
1997 Barry Goldwater Scholar
Quantum information is an exciting field that employs quantum mechanical systems to solve problems in computation and communication. The Brown Group uses the experimental and theoretical techniques of quantum information to address challenges in physical chemistry. The basis of our experimental work is a collection of laser cooled ions trapped in a quadrupole ion trap. The theoretical work focuses on understanding the boundary between classical and quantum algorithms for calculating material properties.
Quantum Control and Quantum Error Correction:
The central challenge of realizing the benefits of a quantum information device is the reduction of errors in the quantum systems. The Brown lab approaches this problem at both the physical level of the system and environment and the more abstract level of codes and operators. We construct and study quantum control techniques such as composite pulse sequences and dynamic decoupling. We are also comparing the properties of quantum error correction codes when mapped to realistic physical devices and developing new methods for generating codes.
Surface Electrode Ion Traps:
Working with collaborators at Sandia and GTRI, we are building quantum information devices using surface electrode ion traps. These surface electrode ion traps are microfabricated allowing us to construct a networked collection of micron-scale ion traps with built-in functionality for ion control and measurement.
Cold Molecular Ions:
The reaction dynamics of molecules at millikelvin temperatures exhibit interesting quantum mechanical effects that are typically hidden by thermal averaging. However, preparing molecules at millikelvin temperatures and then accurately measuring reaction products has been a long-standing challenge for physical chemists. The Brown Group is developing a technique that uses atomic ions to cool and measure molecular ions. This technique will allow for the detection of weak molecular transitions by atomic fluorescence which will be useful for fundamental studies of chemical reactions.