Hi all,

Next Monday, Elias Rothlin will tell us about “Exploring the Connection between Gauge Theory and Quantum Error Correction via Quantum Reference Frames”. See below for the abstract.

The talk will take place on Monday at 11:15 in HIT F 32.

Best, Ladina

**** Title: Exploring the Connection between Gauge Theory and Quantum Error Correction via Quantum Reference Frames

Abstract: How is physical information robustly preserved in quantum gauge theories? One possible way of addressing this question is by noticing that gauge systems share a key feature with quantum error correction codes (QECCs): in both cases, the relevant information is redundantly encoded in a larger space. In gauge theories, this ensures invariance under certain gauge symmetry transformations, while in QECCs, it protects logical data against noise by distributing it as entanglement across many subsystems. This connection has been made precise in prior work where stabilizer QECCs were interpreted as gauge systems and their error correction properties were investigated via the perspective-neutral framework of quantum reference frames (QRFs). Applying the tools of this formalism, we identify sets of correctable errors for general gauge systems viewed as QECCs. As an example, we analyze lattice quantum electrodynamics as a QECC and its correctable errors tied to QRFs and to syndrome measurements.