Mixed-state additivity properties of magic monotones based on quantum relative entropies for single-qubit states and beyond
| Autor: | Rubboli, Roberto, Takagi, Ryuji, Tomamichel, Marco |
|---|---|
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Quantum 8, 1492 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.22331/q-2024-10-04-1492 |
| Popis: | We prove that the stabilizer fidelity is multiplicative for the tensor product of an arbitrary number of single-qubit states. We also show that the relative entropy of magic becomes additive if all the single-qubit states but one belong to a symmetry axis of the stabilizer octahedron. We extend the latter results to include all the $\alpha$-$z$ R\'enyi relative entropy of magic. This allows us to identify a continuous set of magic monotones that are additive for single-qubit states. We also show that all the monotones mentioned above are additive for several standard two and three-qubit states subject to depolarizing noise. Finally, we obtain closed-form expressions for several states and tighter lower bounds for the overhead of probabilistic one-shot magic state distillation. Comment: v4: Fixed a missing exponent in Section 6, equation 44 |
| Databáze: | arXiv |
| Externí odkaz: |
|