High-Dimensional Two-Photon Quantum Controlled Phase-Flip Gate

• URL: http://arxiv.org/abs/2404.14673v1
• Date: Tue, 23 Apr 2024 01:58:43 GMT
• Title: High-Dimensional Two-Photon Quantum Controlled Phase-Flip Gate
• Authors: Mingyuan Chen, Jiangshan Tang, Miao Cai, Franco Nori, Keyu Xia,
• Abstract summary: We propose to the best of our knowledge the first high-dimensional, deterministic and universal two-photon quantum gate. By using an optical cavity embedded with a single trapped 40Ca+ ion, we achieve a high average fidelity larger than 98%. Our proposed system can be an essential building block for high-dimensional quantum information processing, and also provides a platform for studying high-dimensional cavity QED.
• Score: 1.0660502023086995
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: High-dimensional quantum systems have been used to reveal interesting fundamental physics and to improve information capacity and noise resilience in quantum information processing. However, it remains a significant challenge to realize universal two-photon quantum gates in high dimensions with high success probability. Here, by considering an ion-cavity QED system, we theoretically propose, to the best of our knowledge, the first high-dimensional, deterministic and universal two-photon quantum gate. By using an optical cavity embedded with a single trapped 40Ca+ ion, we achieve a high average fidelity larger than 98% for a quantum controlled phase-flip gate in four-dimensional space, spanned by photonic spin angular momenta and orbital angular momenta. Our proposed system can be an essential building block for high-dimensional quantum information processing, and also provides a platform for studying high-dimensional cavity QED.

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