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quant-ph2026
Anti-symmetrization is cheap and useful
Adam Bene Watts, John Bostanci, Matthias C. Caro +3
We consider the computational task of anti-symmetrization of an unknown mixed quantum state: Given iid copies of a rank- qudit state $ρ=\sum_{i=1}^r λ_i |φ_i\rangle\!\langleφ_i|…
quant-ph2026
Cloning is as Hard as Learning for Stabilizer States
Nikhil Bansal, Matthias C. Caro, Gaurav Mahajan
The impossibility of simultaneously cloning non-orthogonal states lies at the foundations of quantum theory. Even when allowing for approximation errors, cloning an arbitrary unkno…