This title appears in the Scientific Report :
2022
Parasitic free gate
Parasitic free gate
Implementation of high-performance two-qubit gates is a key factor for scalable quantum computation. However, the state-of-the-art superconducting two-qubit gates are yet far from being perfect due to the parasitic ZZ coupling. In this paper, we propose a parasitic free (PF) gate to suppress such un...
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Personal Name(s): | Xu, Xuexin (Corresponding author) |
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Ansari, Mohammad | |
Contributing Institute: |
Theoretische Nanoelektronik; PGI-2 |
Imprint: |
2022
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Conference: | APS March Meeting, Chicago (USA), 2022-03-14 - 2022-03-18 |
Document Type: |
Conference Presentation |
Research Program: |
Quantum Networking |
Publikationsportal JuSER |
Implementation of high-performance two-qubit gates is a key factor for scalable quantum computation. However, the state-of-the-art superconducting two-qubit gates are yet far from being perfect due to the parasitic ZZ coupling. In this paper, we propose a parasitic free (PF) gate to suppress such unwanted interaction in use of the tunable coupler. The gate is operated in two modes: in idle mode the coupler frequency is tuned such that the two qubits are effectively decoupled; in driven mode the coupler frequency is tuned so as to result in a nonzero static ZZ interaction, which later can be cancelled by the dynamical part. Our theory shows that using this method the fidelity of a CR gate is able to achieve the coherence limit. |