研究目的
To design and implement more general (SWAP)1/m and controlled-(swap)1/m gates for quantum computation using solid-state quantum dots and flying single photons.
研究成果
The proposed schemes for implementing (SWAP)1/m and controlled-(swap)1/m gates are feasible with current experimental technology. The gates are superior to their synthesis-based counterparts in terms of the number of required CNOT gates and additional computational qubits. The evaluations show that the gates can achieve high fidelities and efficiencies under certain conditions.
研究不足
The performance of the photon-QD emitter may decrease due to exciton dephasing, imperfect birefringence, and side leakage from the cavity. Strong coupling is a challenge in practice, and the fidelity might be reduced by heavy-light hole mixing.
1：Experimental Design and Method Selection:
The schemes involve directing flying single photons to interact with solid-state quantum dots embedded in double-sided microcavities. The parameter m is controlled by adjusting two quarter-wave plates and one half-wave plate.
2：Sample Selection and Data Sources:
The samples are single charged quantum dots (QDs) embedded in double-sided optical microcavities. The data sources are the interactions between the photons and the QDs.
3：List of Experimental Equipment and Materials:
The equipment includes quantum dots, optical microcavities, quarter-wave plates, half-wave plates, polarizing beam splitters, and balanced beam splitters.
4：Experimental Procedures and Operational Workflow:
The procedures involve the interaction of photons with QDs, the application of Hadamard operations on QDs, and the use of phase gates and beam splitters to achieve the desired quantum gates.
5：Data Analysis Methods:
The performance of the gates is evaluated by calculating the average fidelities and efficiencies as functions of the QD-cavity coupling strength and the cavity side leakage rate.
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