"Beyond Traditional Quantum Measurement: A Game of Quantum Peek-a-Boo with a Purpose"

Kyle Keane, Department of Physics and Astronomy, University of California, Riverside

What we learn about measurement in quantum mechanics from textbooks is not the complete story.  The full irreversible collapse of the wavefunction is not the only possible outcome from the observation of a quantum system.  We will discuss the other possibility, when the wavefunction is only partially collapsed by what is called a “weak measurement.”  Within this new framework we discover that it is even possible to undo these measurements and return a quantum system to its original superposition.  These measurements can also be used to suppress the unwanted evolution of a quantum system due to interactions with its environment.  We will discuss the theoretical application of “weak measurements” for decoherence suppression,  and a recent experimental demonstration of its effectiveness.


Kyle is a graduate of California State University, Fullerton and is completing his PhD at UC-Riverside.