| Autor: |
Alireza Seif, Ze-Pei Cian, Sisi Zhou, Senrui Chen, Liang Jiang |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
PRX Quantum, Vol 4, Iss 1, p 010303 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2691-3399 |
| DOI: |
10.1103/PRXQuantum.4.010303 |
| Popis: |
Mitigating errors in quantum information processing devices is especially important in the absence of fault tolerance. An effective method in suppressing state-preparation errors is using multiple copies to distill the ideal component from a noisy quantum state. Here, we use classical shadows and randomized measurements to circumvent the need for coherent access to multiple copies at an exponential cost. We study the scaling of resources using numerical simulations and find that the overhead is still favorable compared to full state tomography. We optimize measurement resources under realistic experimental constraints and apply our method to an experiment preparing a Greenberger-Horne-Zeilinger state with trapped ions. In addition to improving stabilizer measurements, the analysis of the improved results reveals the nature of errors affecting the experiment. Hence, our results provide a directly applicable method for mitigating errors in near-term quantum computers. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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