Cavity-mediated cross-cross-resonance gate
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arXiv
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| Hauptverfasser: | , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916777483567104 |
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| author | Gorshkov, Alexey V. Cohen, Daniel Haim, Arbel Rotem, Amit Golan, Or Kim, Gihwan Butler, Andreas Hann, Connor T. Painter, Oskar Brandão, Fernando G. S. L. Retzker, Alex |
| author_facet | Gorshkov, Alexey V. Cohen, Daniel Haim, Arbel Rotem, Amit Golan, Or Kim, Gihwan Butler, Andreas Hann, Connor T. Painter, Oskar Brandão, Fernando G. S. L. Retzker, Alex |
| contents | We propose a cavity-mediated gate between two transmon qubits or other nonlinear superconducting elements. The gate is realized by driving both qubits at a frequency that is near-resonant with the frequency of the cavity. Since both qubits are subject to a cross-resonant drive, we call this gate a cross-cross-resonance gate. In close analogy with gates between trapped-ion qubits, in phase space, the state of the cavity makes a circle whose area depends on the state of the two qubits, realizing a controlled-phase gate. We propose two schemes for canceling the dominant error, which is the dispersive coupling. We also show that this cross-cross-resonance gate allows one to realize simultaneous gates between multiple pairs of qubits coupled via the same metamaterial composed of an array of coupled cavities or other linear mediators. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03239 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cavity-mediated cross-cross-resonance gate Gorshkov, Alexey V. Cohen, Daniel Haim, Arbel Rotem, Amit Golan, Or Kim, Gihwan Butler, Andreas Hann, Connor T. Painter, Oskar Brandão, Fernando G. S. L. Retzker, Alex Quantum Physics We propose a cavity-mediated gate between two transmon qubits or other nonlinear superconducting elements. The gate is realized by driving both qubits at a frequency that is near-resonant with the frequency of the cavity. Since both qubits are subject to a cross-resonant drive, we call this gate a cross-cross-resonance gate. In close analogy with gates between trapped-ion qubits, in phase space, the state of the cavity makes a circle whose area depends on the state of the two qubits, realizing a controlled-phase gate. We propose two schemes for canceling the dominant error, which is the dispersive coupling. We also show that this cross-cross-resonance gate allows one to realize simultaneous gates between multiple pairs of qubits coupled via the same metamaterial composed of an array of coupled cavities or other linear mediators. |
| title | Cavity-mediated cross-cross-resonance gate |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2506.03239 |