Universal Hamiltonian control in a planar trimon circuit
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866914544525246464 |
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| author | Maurya, Vivek Kowsari, Daria Saurav, Kumar Shanto, S. A. Vijay, R. Lidar, Daniel A. Levenson-Falk, Eli M. |
| author_facet | Maurya, Vivek Kowsari, Daria Saurav, Kumar Shanto, S. A. Vijay, R. Lidar, Daniel A. Levenson-Falk, Eli M. |
| contents | Multimode circuits provide an avenue for flexible control of single and multi-qubit gates. In this work we implement a multimode circuit known as a trimon integrated in a planar geometry. The trimon features three transmon-like modes with strong all-to-all $ZZ$ coupling. We demonstrate high fidelity operations on the trimon, achieving flexible control of its rich state space. This includes qubit rotations conditioned on one or both other qubits, unconditional single-qubit rotations, and both excitation-conserving and double-excitation two-qubit entangling gates. Through multi-tone driving we are able to implement all 16 two-qubit Pauli operators in the two-qubit space. We further demonstrate using the trimon as a qudit with up to 8 states and higher coherence than typical transmon-based implementations. Our results show a compact, highly controllable device that can potentially replace transmons in standard superconducting processor architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_04566 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Universal Hamiltonian control in a planar trimon circuit Maurya, Vivek Kowsari, Daria Saurav, Kumar Shanto, S. A. Vijay, R. Lidar, Daniel A. Levenson-Falk, Eli M. Quantum Physics Multimode circuits provide an avenue for flexible control of single and multi-qubit gates. In this work we implement a multimode circuit known as a trimon integrated in a planar geometry. The trimon features three transmon-like modes with strong all-to-all $ZZ$ coupling. We demonstrate high fidelity operations on the trimon, achieving flexible control of its rich state space. This includes qubit rotations conditioned on one or both other qubits, unconditional single-qubit rotations, and both excitation-conserving and double-excitation two-qubit entangling gates. Through multi-tone driving we are able to implement all 16 two-qubit Pauli operators in the two-qubit space. We further demonstrate using the trimon as a qudit with up to 8 states and higher coherence than typical transmon-based implementations. Our results show a compact, highly controllable device that can potentially replace transmons in standard superconducting processor architectures. |
| title | Universal Hamiltonian control in a planar trimon circuit |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2603.04566 |