Topological transport
Stiefel-Whitney invariants in nodal-line semimetals, and what they actually do to measurable conductivity. With Junyeong Ahn at UT Austin.
Aravind Karthigeyan Condensed matter theory and quantum information.
I'm an incoming physics Ph.D. student at the University of Illinois Urbana-Champaign, starting fall 2026. Most of what I think about is quantum many-body theory: topological phases, their transport signatures, and questions on the border with quantum information.
I finished my B.S. in physics and mathematics at UT Austin in May 2026. As an undergrad I worked on topological transport with Junyeong Ahn, spent a summer at MIT doing cavity magnonics in Luqiao Liu's group, and helped teach Scott Aaronson's intro quantum computing stream for two years.
News
- Graduated from UT Austin with a B.S. in physics and mathematics.
- Our cavity-magnonics preprint is up: arXiv:2602.00287.
- Gave a contributed talk on parametric down-conversion of magnons at TECHCON in Austin.
- Started a summer REU at MIT in Luqiao Liu's group.
- Presented our ReS2 characterization work at the Texas Section APS meeting.
What I work on
Short versions below; longer ones on the research page.
Quantum information
Boson sampling, continuous-time quantum search, and what complexity theory can say about many-body systems. This is where I want to spend more of my Ph.D.
Magnonics
Spin waves, cavity-magnon coupling, and parametric down-conversion. My main undergrad project, now a preprint.
Notes
Things from talks, calculations I want to keep, occasional updates. There's an RSS feed.
Contact
Email is the best way to reach me: aravindkarthigeyan@utexas.edu. The address stays active through August 2026.