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quant-ph2026
Unitary Schur Sampling of Qudits via Random SWAP Tests: Hunt for Antisymmetry
Shrigyan Brahmachari, David Jakab, Henry D. Pfister +1
Schur sampling is a fundamental primitive for extracting permutation-invariant information from many-body quantum systems and has broad applications in quantum information science.…
quant-ph2025
Optimal Qubit Purification and Unitary Schur Sampling via Random SWAP Tests
Shrigyan Brahmachari, Austin Hulse, Henry D. Pfister +1
The goal of qubit purification is to combine multiple noisy copies of an unknown pure quantum state to obtain one or more copies that are closer to the pure state. We show that a s…