Applied Dynamics Seminar

Date
Thu, Oct 10, 2019 12:30 pm - 1:30 pm
Location
IREAP Large Conference Room (ERF 1207)

Description

Title: Quantum impulse control
Speaker: Christopher Jarzynski
University of Maryland | Department of Chemistry & Biochemistry and Department of Physics

Abstract: The quantum adiabatic theorem governs the evolution of a wavefunction under a slowly time-varying Hamiltonian. I will consider the opposite limit of a Hamiltonian that is varied impulsively: a strong perturbation U(x,t) is applied over a time interval of infinitesimal duration ε approaches 0. When the strength of the perturbation scales like 1/ε^2, there emerges an interesting dynamical behavior characterized by an abrupt displacement of the wave function in coordinate space. I will solve for the evolution of the wavefunction in this situation. Remarkably, the solution involves a purely classical construction, yet describes the quantum evolution exactly, rather than approximately. I will use these results to show how appropriately tailored impulses can be used to control the behavior of a quantum wavefunction.

Upcoming Events

22 Jan
LPS Seminar
Date Wed, Jan 22, 2020 2:30 pm - 3:30 pm
27 Jan
JQI Seminar
Date Mon, Jan 27, 2020 11:00 am - 12:00 pm
27 Jan
EPT Seminar
Date Mon, Jan 27, 2020 4:00 pm - 5:30 pm
28 Jan
Physics Colloquium
Date Tue, Jan 28, 2020 4:00 pm - 5:00 pm
30 Jan
QMC COLLOQUIUM: Cagliyan Kurdak, University of Michigan
Date Thu, Jan 30, 2020 2:00 pm - 3:00 pm