This title appears in the Scientific Report :
2021
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevApplied.15.064074 in citations.
Please use the identifier: http://hdl.handle.net/2128/29149 in citations.
Z Z Freedom in Two-Qubit Gates
Z Z Freedom in Two-Qubit Gates
Superconducting qubits on a circuit exhibit an always-on state-dependent phase error. This error is due to sub-MHz parasitic interaction that repels computational levels from noncomputational ones. We study a general theory to evaluate the “static” repulsion between seemingly idle qubits as well as...
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Personal Name(s): | Xu, Xuexin |
---|---|
Ansari, Mohammad (Corresponding author) | |
Contributing Institute: |
Theoretische Nanoelektronik; PGI-2 |
Published in: | Physical review applied, 15 (2021) 6, S. 064074 |
Imprint: |
College Park, Md. [u.a.]
American Physical Society
2021
|
DOI: |
10.1103/PhysRevApplied.15.064074 |
Document Type: |
Journal Article |
Research Program: |
Quantum Networking |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/29149 in citations.
Superconducting qubits on a circuit exhibit an always-on state-dependent phase error. This error is due to sub-MHz parasitic interaction that repels computational levels from noncomputational ones. We study a general theory to evaluate the “static” repulsion between seemingly idle qubits as well as the “dynamical” repulsion between entangled qubits under microwave driving gate. By combining qubits of either the same or opposite anharmonicity signs we find the characteristics of static and dynamical ZZ freedoms. The latter universally eliminate the parasitic repulsion, leading us to mitigate high-fidelity gate operation. Our theory introduces the opportunities for making perfect entangled and unentangled states, which is extremely useful for quantum technology. |