期刊
PHYSICAL REVIEW X
卷 4, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.4.041041
关键词
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资金
- EPSRC [EP/J015067/1]
- Singapore National Research Foundation under NRF [NRF-NRFF2013-01]
- EPSRC [EP/J015067/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [1102904, EP/J015067/1] Funding Source: researchfish
Exquisite quantum control has now been achieved in small ion traps, in nitrogen-vacancy centers and in superconducting qubit clusters. We can regard such a system as a universal cell with diverse technological uses from communication to large-scale computing, provided that the cell is able to network with others and overcome any noise in the interlinks. Here, we show that loss-tolerant entanglement purification makes quantum computing feasible with the noisy and lossy links that are realistic today: With a modestly complex cell design, and using a surface code protocol with a network noise threshold of 13.3%, we find that interlinks that attempt entanglement at a rate of 2 MHz but suffer 98% photon loss can result in kilohertz computer clock speeds (i.e., rate of high-fidelity stabilizer measurements). Improved links would dramatically increase the clock speed. Our simulations employ local gates of a fidelity already achieved in ion trap devices.
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