Scalable quantum computing stabilised by optical tweezers on an ion crystal
As it has been demonstrated that trapped ion systems have unmatched long-lived quantum-bit (qubit) coherence and can support high-fidelity quantum manipulations, how to scale up the system size becomes an inevitable task for practical purposes. In this work, we theoretically analyse the physical lim...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ab84b6 |
| _version_ | 1797750286776795136 |
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| author | Yu-Ching Shen Guin-Dar Lin |
| author_facet | Yu-Ching Shen Guin-Dar Lin |
| author_sort | Yu-Ching Shen |
| collection | DOAJ |
| description | As it has been demonstrated that trapped ion systems have unmatched long-lived quantum-bit (qubit) coherence and can support high-fidelity quantum manipulations, how to scale up the system size becomes an inevitable task for practical purposes. In this work, we theoretically analyse the physical limitation of scalability with a trapped ion array, and propose a feasible scheme of architecture that in principle allows an arbitrary number of ion qubits, for which the overhead only scales linearly with the system size. This scheme relies on the combined ideas of a trap architecture of tunable size, stabilisation of an ion crystal by optical tweezers, and continuous sympathetic cooling without touching the stored information. We demonstrate that illumination of optical tweezers modifies the motional spectrum by effectively pinning the ions, lifting the frequencies of the motional ground modes. By doing so, we make the structure of the array less vulnerable from thermal excitations, and suppress the position fluctuations to insure faithful gate operations. Finally, we also explore the local behaviour of cooling when a sub-array is isolated by optical tweezers from other parts of the crystal. |
| first_indexed | 2024-03-12T16:30:31Z |
| format | Article |
| id | doaj.art-6acf0580a4ea4cc19e2f587946ac967d |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:30:31Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-6acf0580a4ea4cc19e2f587946ac967d2023-08-08T15:30:38ZengIOP PublishingNew Journal of Physics1367-26302020-01-0122505303210.1088/1367-2630/ab84b6Scalable quantum computing stabilised by optical tweezers on an ion crystalYu-Ching Shen0Guin-Dar Lin1https://orcid.org/0000-0002-2243-9490Center for Quantum Science and Engineering and Department of Physics, National Taiwan University , Taipei 10617, TaiwanCenter for Quantum Science and Engineering and Department of Physics, National Taiwan University , Taipei 10617, TaiwanAs it has been demonstrated that trapped ion systems have unmatched long-lived quantum-bit (qubit) coherence and can support high-fidelity quantum manipulations, how to scale up the system size becomes an inevitable task for practical purposes. In this work, we theoretically analyse the physical limitation of scalability with a trapped ion array, and propose a feasible scheme of architecture that in principle allows an arbitrary number of ion qubits, for which the overhead only scales linearly with the system size. This scheme relies on the combined ideas of a trap architecture of tunable size, stabilisation of an ion crystal by optical tweezers, and continuous sympathetic cooling without touching the stored information. We demonstrate that illumination of optical tweezers modifies the motional spectrum by effectively pinning the ions, lifting the frequencies of the motional ground modes. By doing so, we make the structure of the array less vulnerable from thermal excitations, and suppress the position fluctuations to insure faithful gate operations. Finally, we also explore the local behaviour of cooling when a sub-array is isolated by optical tweezers from other parts of the crystal.https://doi.org/10.1088/1367-2630/ab84b6trapped ionsscalable quantum computingoptical tweezersion crystalsympathetic cooling |
| spellingShingle | Yu-Ching Shen Guin-Dar Lin Scalable quantum computing stabilised by optical tweezers on an ion crystal New Journal of Physics trapped ions scalable quantum computing optical tweezers ion crystal sympathetic cooling |
| title | Scalable quantum computing stabilised by optical tweezers on an ion crystal |
| title_full | Scalable quantum computing stabilised by optical tweezers on an ion crystal |
| title_fullStr | Scalable quantum computing stabilised by optical tweezers on an ion crystal |
| title_full_unstemmed | Scalable quantum computing stabilised by optical tweezers on an ion crystal |
| title_short | Scalable quantum computing stabilised by optical tweezers on an ion crystal |
| title_sort | scalable quantum computing stabilised by optical tweezers on an ion crystal |
| topic | trapped ions scalable quantum computing optical tweezers ion crystal sympathetic cooling |
| url | https://doi.org/10.1088/1367-2630/ab84b6 |
| work_keys_str_mv | AT yuchingshen scalablequantumcomputingstabilisedbyopticaltweezersonanioncrystal AT guindarlin scalablequantumcomputingstabilisedbyopticaltweezersonanioncrystal |