Resource Costs for Fault-Tolerant Linear Optical Quantum Computing
Linear optical quantum computing (LOQC) seems attractively simple: Information is borne entirely by light and processed by components such as beam splitters, phase shifters, and detectors. However, this very simplicity leads to limitations, such as the lack of deterministic entangling operations, wh...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2015-10-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.5.041007 |
| _version_ | 1818401251542433792 |
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| author | Ying Li Peter C. Humphreys Gabriel J. Mendoza Simon C. Benjamin |
| author_facet | Ying Li Peter C. Humphreys Gabriel J. Mendoza Simon C. Benjamin |
| author_sort | Ying Li |
| collection | DOAJ |
| description | Linear optical quantum computing (LOQC) seems attractively simple: Information is borne entirely by light and processed by components such as beam splitters, phase shifters, and detectors. However, this very simplicity leads to limitations, such as the lack of deterministic entangling operations, which are compensated for by using substantial hardware overheads. Here, we quantify the resource costs for full-scale LOQC by proposing a specific protocol based on the surface code. With the caveat that our protocol can be further optimized, we report that the required number of physical components is at least 5 orders of magnitude greater than in comparable matter-based systems. Moreover, the resource requirements grow further if the per-component photon-loss rate is worse than 10^{−3} or the per-component noise rate is worse than 10^{−5}. We identify the performance of switches in the network as the single most influential factor influencing resource scaling. |
| first_indexed | 2024-12-14T07:49:30Z |
| format | Article |
| id | doaj.art-da066a1a0a0048c0b81213909398d325 |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-12-14T07:49:30Z |
| publishDate | 2015-10-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-da066a1a0a0048c0b81213909398d3252022-12-21T23:10:46ZengAmerican Physical SocietyPhysical Review X2160-33082015-10-015404100710.1103/PhysRevX.5.041007Resource Costs for Fault-Tolerant Linear Optical Quantum ComputingYing LiPeter C. HumphreysGabriel J. MendozaSimon C. BenjaminLinear optical quantum computing (LOQC) seems attractively simple: Information is borne entirely by light and processed by components such as beam splitters, phase shifters, and detectors. However, this very simplicity leads to limitations, such as the lack of deterministic entangling operations, which are compensated for by using substantial hardware overheads. Here, we quantify the resource costs for full-scale LOQC by proposing a specific protocol based on the surface code. With the caveat that our protocol can be further optimized, we report that the required number of physical components is at least 5 orders of magnitude greater than in comparable matter-based systems. Moreover, the resource requirements grow further if the per-component photon-loss rate is worse than 10^{−3} or the per-component noise rate is worse than 10^{−5}. We identify the performance of switches in the network as the single most influential factor influencing resource scaling.http://doi.org/10.1103/PhysRevX.5.041007 |
| spellingShingle | Ying Li Peter C. Humphreys Gabriel J. Mendoza Simon C. Benjamin Resource Costs for Fault-Tolerant Linear Optical Quantum Computing Physical Review X |
| title | Resource Costs for Fault-Tolerant Linear Optical Quantum Computing |
| title_full | Resource Costs for Fault-Tolerant Linear Optical Quantum Computing |
| title_fullStr | Resource Costs for Fault-Tolerant Linear Optical Quantum Computing |
| title_full_unstemmed | Resource Costs for Fault-Tolerant Linear Optical Quantum Computing |
| title_short | Resource Costs for Fault-Tolerant Linear Optical Quantum Computing |
| title_sort | resource costs for fault tolerant linear optical quantum computing |
| url | http://doi.org/10.1103/PhysRevX.5.041007 |
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