Ewin Tang
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| title | conference | date |
|---|---|---|
| How did we miss the random purification channel? | Summer Cluster Final Workshop 2026 | 2026-07-17 |
An efficient quantum channel converts N copies of a mixed state ρ into N copies of a random purification (the same purification each time), implemented by a… | ||
| When do you need an inverse or controlled unitary oracle? | Summer Cluster on Quantum Computing 2025 | 2025-07-07 |
Amplitude estimation provably needs both U and U^{-1} to get the usual 1/ε vs 1/ε^2 quantum speedup: with only forward queries and large dimension d ≳ 1/ε^2… | ||
| Optimal Learning of Quantum Hamiltonians From High-Temperature Gibbs States | Quantum Wave in Computing Reunion 2021 | 2021-07-15 |
Proves optimal sample complexity for learning L‑local n‑qubit Hamiltonian coefficients from high‑temperature Gibbs states (beta below a constant): sample count… | ||
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