3 papers
quant-ph2026
Butterfly Echo Protocol for Axis-Agnostic Heisenberg-Limited Metrology
Jacob Bringewatt, Leon Zaporski, Matthew Radzihovsky +4
The extreme sensitivity of chaotic systems to external perturbations makes them natural candidates for sensing applications. We propose a single-shot echo-based protocol for estima…
quant-ph2026
Sample-efficient benchmarking of shallow all-to-all random quantum circuits
Gregory Bentsen, Bill Fefferman, Soumik Ghosh +2
Random circuit sampling (RCS) remains one of the most competitive frameworks for demonstrating quantum advantage in near-term noisy intermediate-scale quantum (NISQ) hardware. Unfo…
quant-ph2024
On the complexity of sampling from shallow Brownian circuits
Gregory Bentsen, Bill Fefferman, Soumik Ghosh +2
While many statistical properties of deep random quantum circuits can be deduced, often rigorously and other times heuristically, by an approximation to global Haar-random unitarie…