Recoil-Free Quantum Gates for High-Fidelity Operations in Optical Qubit Systems

We present a novel approach for implementing recoil-free quantum gates using optical qubits in trapped atoms and ions, achieving suppression of photon recoil by three orders of magnitude compared to conventional techniques [1]. This method significantly improves the fidelity of quantum gate operations, paving the way for scalable quantum computing applications. Our analytical insights establish fundamental limits on qubit fidelity and introduce a composite pulse protocol that enables the execution of over 1000 quantum gates with an overall fidelity exceeding 99%. The proposed protocol addresses key challenges such as photon recoil, motional decoherence, and probe shifts, making it a promising candidate for high-precision quantum computing and quantum metrology. These advancements mark a crucial step toward implementing large-scale quantum processors based on optical qubits.

[1] Zhang, Zhao, et al. "Recoil-free Quantum Gates with Optical Qubits." arXiv preprint arXiv:2408.04622 (2024)