# Physics Colloquium

Online and In-Person Event

Measuring the knots and braids of non-Hermitian oscillators

Jack Harris

*,*Yale*,*Title: Measuring the knots and braids of non-Hermitian oscillators

Speaker: Jack Harris

Abstract: It may seem unlikely that rich mathematical structures remain to be uncovered in classical harmonic oscillators. Nevertheless, systems that combine non-reciprocity and loss have provided a number of surprises in recent years. I will describe how these systems naturally exhibit braids, knots, and other topological structures. I will also present measurements of these structures (using a cavity optomechanical system), and will describe their potential application in various control schemes. This will be a pedagogical introduction to these topics, with lots of pictures and videos!

**Join via Zoom:**

https://caltech.zoom.us/j/81866929019

Meeting ID: 818 6692 9019

The colloquium is held in Feynman Lecture Hall, 201 E. Bridge.

For more information, please contact Denise Lu by phone at x1392 or by email at deniselu@caltech.edu.

Event Series

Physics Colloquium Series