Three-mode tunable coupler for superconducting two-qubit gates
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916779563941888 |
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| author | Egorova, Elena Yu. Kazmina, Alena S. Simakov, Ilya A. Moskalenko, Ilya N. Abramov, Nikolay N. Kalacheva, Daria A. Lubsanov, Viktor B. Bolgar, Alexey N. Maleeva, Nataliya Besedin, Ilya S. |
| author_facet | Egorova, Elena Yu. Kazmina, Alena S. Simakov, Ilya A. Moskalenko, Ilya N. Abramov, Nikolay N. Kalacheva, Daria A. Lubsanov, Viktor B. Bolgar, Alexey N. Maleeva, Nataliya Besedin, Ilya S. |
| contents | Building a scalable universal high-performance quantum processor is a formidable challenge. In particular, the problem of realizing fast high-perfomance two-qubit gates of high-fidelity remains needful. Here we propose a building block for a scalable quantum processor consisting of two transmons and a tunable three-mode coupler allowing for a ZZ interaction control. We experimentally demonstrate the native CZ gate with the pulse duration of 60 ns achieving the two-qubit gate fidelity above 98%, limited mostly by qubit coherence time. Numerical simulations show that by optimizing the gate duration the fidelity can be pushed over 99.97%. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_10886 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Three-mode tunable coupler for superconducting two-qubit gates Egorova, Elena Yu. Kazmina, Alena S. Simakov, Ilya A. Moskalenko, Ilya N. Abramov, Nikolay N. Kalacheva, Daria A. Lubsanov, Viktor B. Bolgar, Alexey N. Maleeva, Nataliya Besedin, Ilya S. Quantum Physics Building a scalable universal high-performance quantum processor is a formidable challenge. In particular, the problem of realizing fast high-perfomance two-qubit gates of high-fidelity remains needful. Here we propose a building block for a scalable quantum processor consisting of two transmons and a tunable three-mode coupler allowing for a ZZ interaction control. We experimentally demonstrate the native CZ gate with the pulse duration of 60 ns achieving the two-qubit gate fidelity above 98%, limited mostly by qubit coherence time. Numerical simulations show that by optimizing the gate duration the fidelity can be pushed over 99.97%. |
| title | Three-mode tunable coupler for superconducting two-qubit gates |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2405.10886 |