Androma
Talk Geometry Number Theory Algebra In Person

Heisenberg SICs, Stark Units and Weil Representations


12:00 – 13:00 (London)
J-11 Hicks Building
Sourced from
researchseminars.org  
In Person
Talk
Sign in to RSVP
Add to calendar

Abstract

SICs, also known as equiangular tight frames, are configurations of $d^2$ equiangular lines in $\mathbb{C}^d$ whose applications in signal processing and quantum physics have been known and studied for more than 30 years. More recently, numerical investigations of so-called Heisenberg SICs (which have an action of $\mathcal{H}(\mathbb{Z}/d\mathbb{Z})$ via its Schr\¨odinger representation) have revealed surprising, heuristic connections with conjectural ``Stark units'' and hence with Hilbert’s 12th Problem over real-quadratic fields. Just as intriguingly, the action of Galois on these units seems to be connected to the action of $\mathrm{SL}_2(\mathbb{Z}/d\mathbb{Z})$ on the set of Heisenberg SICs via its $d$-dimensional Weil representation as a subgroup of the automorphism group of $\mathcal{H}(\mathbb{Z}/d\mathbb{Z})$. In my talk, I will first give an overview of recent SIC-related research, as well as the Stark Conjectures (which date from the 1970s but are still largely unproven). I will explain the experimental evidence connecting SICs with Stark-Units over the field $\mathbb{Q}(\sqrt{(d−1)(d+3)})$. On a more specialised note and as time permits, I will outline my recent work on the lifted Weil representation in the case $d = p^n$ and possible connections to a $p$-adic theory of SICs.

Speakers 1

DS
David Solomon

Institutions

University of Sheffield

Discussion 0 Open full thread →

No comments yet. to start the discussion. No comments yet. Be the first to share your thoughts!

Similar Events

Event data sourced from researchseminars.org. Androma is not affiliated with researchseminars.org.

Claim this event

If you are the organizer of this event on researchseminars.org, you can request to claim it on Androma. This will let you manage the event, add prerequisites, and link it to your Androma profile.

Claim submitted. An admin will review your request.

Tue, Sep 22 · 12:00 (London)
Sign in to RSVP