Abstract

In this paper, quantum process tomography of the designed photonic-qubit-based deterministic iSWAP gate has been done and compared with the ideal iSWAP gate. The gate is designed and simulated using a resonator as a coupler. The performance (fidelity and concurrence) of the designed iSWAP gate has been analytically investigated. The effect of cavity parameters (coupling strength and cavity mode decay rate) on performance of the designed iSWAP gate has been observed. A maximum fidelity of 47.06% is obtained at a coupling strength of 0.02 and cavity mode decay rate of 0.0005, and a maximum concurrence of 0.474 is obtained at a coupling strength of 0.02 and cavity mode decay rate of 0. The research work reported in this paper can be used for further investigation and implementation of quantum information processing systems.

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