Demonstration of two qubit entangling gates in a 2D ring resonator based coupler architecture
Abstract We report entangling two-qubit experiments implemented in a novel ring resonator architecture in 2D planar geometry. The ring resonator acts as a multi-path coupler between qubits and can provide beyond nearest neighbour interactions. We demonstrate pairwise coupling between three fixed-fre...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-02-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-87410-z |
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| author | Anirban Bhattacharjee Panya Jain Jay Deshmukh Srijita Das Madhavi Chand Meghan P. Patankar R. Vijay |
| author_facet | Anirban Bhattacharjee Panya Jain Jay Deshmukh Srijita Das Madhavi Chand Meghan P. Patankar R. Vijay |
| author_sort | Anirban Bhattacharjee |
| collection | DOAJ |
| description | Abstract We report entangling two-qubit experiments implemented in a novel ring resonator architecture in 2D planar geometry. The ring resonator acts as a multi-path coupler between qubits and can provide beyond nearest neighbour interactions. We demonstrate pairwise coupling between three fixed-frequency transmon qubits connected to the ring resonator with measured coupling strengths (4.70 MHz, 2.80 MHz, and 2.65 MHz) in good agreement with those predicted from finite-element simulations. We implement an all-microwave controlled phase (CPHASE) gate between a pair of qubits with a gate time of 196 ns and demonstrate a two-qubit Bell state with a measured state fidelity of $$F = 0.88$$ . Our results demonstrate the ability to entangle two qubits using the ring resonator and pave the way for creating highly connected multi-qubit networks in this architecture. |
| format | Article |
| id | doaj-art-aa31f039827f4ef1b59b7ed0d9757668 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-aa31f039827f4ef1b59b7ed0d97576682025-02-09T12:32:47ZengNature PortfolioScientific Reports2045-23222025-02-011511910.1038/s41598-025-87410-zDemonstration of two qubit entangling gates in a 2D ring resonator based coupler architectureAnirban Bhattacharjee0Panya Jain1Jay Deshmukh2Srijita Das3Madhavi Chand4Meghan P. Patankar5R. Vijay6Department of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental ResearchDepartment of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental ResearchDepartment of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental ResearchDepartment of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental ResearchDepartment of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental ResearchDepartment of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental ResearchDepartment of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental ResearchAbstract We report entangling two-qubit experiments implemented in a novel ring resonator architecture in 2D planar geometry. The ring resonator acts as a multi-path coupler between qubits and can provide beyond nearest neighbour interactions. We demonstrate pairwise coupling between three fixed-frequency transmon qubits connected to the ring resonator with measured coupling strengths (4.70 MHz, 2.80 MHz, and 2.65 MHz) in good agreement with those predicted from finite-element simulations. We implement an all-microwave controlled phase (CPHASE) gate between a pair of qubits with a gate time of 196 ns and demonstrate a two-qubit Bell state with a measured state fidelity of $$F = 0.88$$ . Our results demonstrate the ability to entangle two qubits using the ring resonator and pave the way for creating highly connected multi-qubit networks in this architecture.https://doi.org/10.1038/s41598-025-87410-z |
| spellingShingle | Anirban Bhattacharjee Panya Jain Jay Deshmukh Srijita Das Madhavi Chand Meghan P. Patankar R. Vijay Demonstration of two qubit entangling gates in a 2D ring resonator based coupler architecture Scientific Reports |
| title | Demonstration of two qubit entangling gates in a 2D ring resonator based coupler architecture |
| title_full | Demonstration of two qubit entangling gates in a 2D ring resonator based coupler architecture |
| title_fullStr | Demonstration of two qubit entangling gates in a 2D ring resonator based coupler architecture |
| title_full_unstemmed | Demonstration of two qubit entangling gates in a 2D ring resonator based coupler architecture |
| title_short | Demonstration of two qubit entangling gates in a 2D ring resonator based coupler architecture |
| title_sort | demonstration of two qubit entangling gates in a 2d ring resonator based coupler architecture |
| url | https://doi.org/10.1038/s41598-025-87410-z |
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