Controllable non-Hermitian qubit-qubit Coupling in Superconducting quantum Circuit
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arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866910748319416320 |
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| author | Wang, Hui Zhao, Yan-Jun Xu, Xun-Wei |
| author_facet | Wang, Hui Zhao, Yan-Jun Xu, Xun-Wei |
| contents | We propose a theoretical scheme to realize the controllable non-Hermitian qubit-qubit coupling by adding a high-loss resonator in tunable coupling superconducting quantum circuit.
By changing the effective qubit-qubit coupling, phase and amplitude of resonator-qubit interaction, and the
qubits' quantum states, we can continually tune the energy level attraction, position of EP (exceptional point),
and the nonreciprocity in the non-Hermitian superconducting circuit.
The EPs and non-reciprocity can affect the quantum states' evolutions and
exchange efficiencies for two qubits in the non-Hermitian superconducting circuit.
The controllable non-Hermitian and nonreciprocal interactions between
two qubits provide a new insights and methods for exploring
the unconventional quantum effects in superconducting quantum circuit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_03397 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Controllable non-Hermitian qubit-qubit Coupling in Superconducting quantum Circuit Wang, Hui Zhao, Yan-Jun Xu, Xun-Wei Quantum Physics We propose a theoretical scheme to realize the controllable non-Hermitian qubit-qubit coupling by adding a high-loss resonator in tunable coupling superconducting quantum circuit. By changing the effective qubit-qubit coupling, phase and amplitude of resonator-qubit interaction, and the qubits' quantum states, we can continually tune the energy level attraction, position of EP (exceptional point), and the nonreciprocity in the non-Hermitian superconducting circuit. The EPs and non-reciprocity can affect the quantum states' evolutions and exchange efficiencies for two qubits in the non-Hermitian superconducting circuit. The controllable non-Hermitian and nonreciprocal interactions between two qubits provide a new insights and methods for exploring the unconventional quantum effects in superconducting quantum circuit. |
| title | Controllable non-Hermitian qubit-qubit Coupling in Superconducting quantum Circuit |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2404.03397 |