Achieving fault tolerance on quantum devices requires n ot just powerful error correcting codes\, but practical strategies for deploying them on imperfect hardware and in complex architectures. Th is talk focuses on surface code quantum error correction (QEC) techniq ues that account for and exploit heterogeneity\, whether that arises f rom nonuniform noise and fabrication defects or from architectural str ucture such as hierarchies in QRAM. We begin by studying how physical qubit imperfections and defect distributions affect logical performanc e\, introducing frameworks for quantifying acceptable levels of defect iveness\, adapting syndrome circuits\, and selecting modular chiplet†‹Â layouts to minimize logical failure and qubit overhead. Next\, we p resent architectural techniques that leverage heterogeneous error prot ection\, such as assigning variable code distances to different logica l roles to balance fidelity against resource cost. Through analytical and simulation-based analysis\, reductions in physical qubit overhead and improvements in QRAM fidelity with heterogeneous surface code depl oyments will be shown. By bridging device-level variation with system level design\, the presented techniques offer a path toward more effic ient and resilient fault tolerant quantum computing in the presence of resource scarcity and hardware heterogeneity.
\nThis event sta rts at 3:30pm with refreshments\, followed at 3:45pm by a short presen tation by Tianyi Hao (graduate student\, Swamit Tannu group) titled "C orrelation Surfaces: An Overlooked Piece in Fault-Tolerant Quantum Com puting". The invited presentation starts at 4pm.
\n URL:https://www.physics.wisc.edu/events/?id=9413 END:VEVENT END:VCALENDAR