[Series 02] RESCQ: Realtime Scheduling for Continuous Angle Quantum Error Correction Architectures

Title: RESCQ: Realtime Scheduling for Continuous Angle Quantum Error Correction Architectures

Speaker: Sayam Sethi, PhD Student, UT ECE

Date: Tuesday April 8th, 2025, 3:30pm

Location: EER 1.518 or Zoom Link

Abstract:

In order to realize large scale quantum error correction (QEC), resource states, such as |T〉, must be prepared which is expensive in both space and time. In order to circumvent this problem, alternatives have been proposed, such as the production of continuous angle rotation states. However, the production of these states is non-deterministic and may require multiple repetitions to succeed. The original proposals suggest architectures which do not account for realtime (or dynamic) management of resources to minimize total execution time. Without a realtime scheduler, a statically generated schedule will be unnecessarily expensive. We propose RESCQ (pronounced rescue), a realtime scheduler for programs compiled onto these continuous angle systems. Our scheme actively minimizes total cycle count by on-demand redistribution of resources based on expected production rates. Depending on the underlying hardware, this can cause excessive classical control overhead. We further address this by dynamically selecting the frequency of our recomputation. RESCQ improves over baseline proposals by an average of 2x in cycle count.

Bio:

Sayam Sethi is a PhD student in the ECE Department at The University of Texas at Austin, advised by Dr. Jonathan Baker. He is currently interested in architectural design for realising Fault-Tolerant Quantum Computers (FTQC), with a specific focus on scheduling realtime operations, and minimizing program runtime. Before joining UT, he obtained his B. Tech. in Computer Science and Engineering from IIT Delhi.