BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:UW-Madison-Physics-Events BEGIN:VEVENT SEQUENCE:5 UID:UW-Physics-Event-9321 DTSTART:20251002T203000Z DTEND:20251002T220000Z DTSTAMP:20260413T121309Z LAST-MODIFIED:20250930T160500Z LOCATION:Discovery Building\, DeLuca Forum SUMMARY:Demonstration of a Logical Architecture Uniting Motion and In- Place Entanglement: Shor's Algorithm\, Constant-Depth CNOT Ladder\, an d Many-Hypercube Code\, Wisconsin Quantum Institute Colloquium\, Prana v Gokhale\, Infleqtion DESCRIPTION:Logical qubits are considered an essential component for a chieving utility-scale quantum computation. Multiple recent demonstrat ions of logical qubits on neutral atoms have relied on coherent qubit motion into entangling zones. However\, this architecture requires mot ion prior to every entangling gate\, incurring significant cost in wal l clock runtime and motion-related error accumulation. We propose and experimentally realize an alternative architecture which unites qubit motion and in-place entanglement via nearest-neighbor gates. Our appro ach maintains all-to-all connectivity\, while minimizing qubit motion overheads. We demonstrate three key results on Infleqtion's Sqale QPU\ , which hosts an array of 114 neutral atom qubits. First\, we perform a logical qubit realization of a pre-compiled variant of Shor's Algori thm. We find better logical-than-physical performance over a range of settings including with loss correction and leakage detection. Second\ , we introduce a technique for performing CNOT ladders with depth inde pendent of both the number of logical qubits N and the code distance d . In proof-of-principle experiments with 8 and 12 logical qubits\, we find ~4x reduction in error via the logical encodings. Third\, we expe rimentally realize initialization of the [[16\, 4\, 4]] many-hypercube QEC code. All three results benefit from optimized compilation via Su perstaq\, as well as our underlying architecture uniting motion and in -place entanglement. This architecture offers a path to reducing the o verhead of utility-scale quantum applications relative to architecture s based on entangling zones.

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This event starts at 3:30pm w ith refreshments\, followed at 3:45pm by a short presentation by Sam N orrell (Saffman group) titled "Engineering Entangling Quantum Gates wi th Interacting Rydberg p-States". The invited presentation starts at 4 pm.

URL:https://www.physics.wisc.edu/events/?id=9321 END:VEVENT END:VCALENDAR