| Autor: |
Shamminuj Aktar, Andreas Bartschi, Abdel-Hameed A. Badawy, Stephan Eidenbenz |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Quantum Engineering, Vol 3, Pp 1-16 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2689-1808 |
| DOI: |
10.1109/TQE.2022.3174547 |
| Popis: |
We present a divide-and-conquer approach to deterministically prepare Dicke states $|D^{n}_{k}\rangle$ (i.e., equal-weight superpositions of all $n$-qubit states with Hamming weight $k$) on quantum computers. In an experimental evaluation for up to $n=6$ qubits on IBM Quantum Sydney and Montreal devices, we achieve significantly higher state fidelity compared to previous results. The fidelity gains are achieved through several techniques: our circuits first “divide” the Hamming weight between blocks of $n/2$ qubits, and then “conquer” those blocks with improved versions of Dicke state unitaries (Bärtschi et al. FCT’2019). Due to the sparse connectivity on IBM’s heavy-hex-architectures, these circuits are implemented for linear nearest neighbor topologies. Further gains in (estimating) the state fidelity are due to our use of measurement error mitigation and hardware progress. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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