Optimal fidelity estimation for density matrix
Yiping Lu, Liyu Lai, Jun Xiang, Yuhan Dai, Ying Zeng, Qi Li · 2024
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Description
Yiping Lu and co-authors found a thriftier way to grade quantum states in a 2024 paper. Fidelity measures how close a made state sits to the wanted one, a core noise check for quantum work. The standard direct method eats many copies of the state, which costs time on real hardware.
Their optimal method asks the flip question: for a set error bar, what is the least copy count that can reach it? That count grows far more slowly than the standard method's as demands rise. Fewer copies mean faster checks of quantum gear. The saving counts most for large states that are dear to make.
Catalog record
| CREATOR | Yiping Lu, Liyu Lai, Jun Xiang, Yuhan Dai, Ying Zeng, Qi Li |
|---|---|
| YEAR | 2024 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 79 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |