QUIQ: Quantum information processed at attosecond timescale in double quantum-dot qubits

在量子信息技术(QIT)领域，具有长相干时间和高保真门的可扩展量子比特平台是实现量子计算能力的关键。Quiq项目旨在探索双量子点(DQd)量子比特的潜力，通过将QD量子信息过程建模专业知识与伦敦国王学院(KCL)阿秒量子物理小组的阿秒物理专业知识相结合，探索以阿秒时间尺度控制的双量子点(DQd)量子比特的潜力。通过在阿秒时间尺度上操作DQd量子比特，我们可以显著减少处理时间，提高超快QIT的性能。该项目致力于通过实现超快激光场引发的拉比振荡来研究DQd量子比特的相干性。我们的目标是实现全量子门，代表第一个阿秒量子门。基本量子门的实现，包括泡利X门、Y门、Z门和Hadamard门，将为未来在DQD量子比特上进行阿秒量子操作提供重要的垫脚石。此外，我们将研究量子电路设计和开发量子纠错技术，以最小化DQD量子比特平台中的错误。该项目将理论研究与KCL主群的实验能力相结合，以优化系统参数，改善相干时间，并增强对拟议的DQd量子比特平台的控制。此外，我们还将研究两部分DQd量子比特中的量子资源，如纠缠和类非谐关联。通过提出将基于高次谐波(HHG)的量子路径干涉技术用于阿秒门读出，该项目架起了阿秒物理和量子技术领域的桥梁，使阿秒量子信息处理取得了重大进展。

In the realm of quantum information technology (QIT), scalable qubit platforms with long coherence times and high-fidelity gates areessential for achieving quantum computational power. The project 'QUIQ' aims to explore the potential of double quantum dot(DQD) qubits controlled at attosecond timescales by combining QD quantum information process modeling expertise with theattosecond physics expertise of the attosecond quantum physics group at King's College London (KCL). By operating DQD qubits atattosecond timescales, we can significantly reduce processing time and enhance performance in ultrafast QIT. The project focuses onstudying the coherence of DQD qubits through the implementation of Rabi oscillations triggered by ultrafast laser fields. We aim torealize atto-qgates, representing the first attosecond quantum gates. The achievement of basic atto-qgates, including Pauli X, Y, Z,and Hadamard gates, will provide a crucial stepping stone towards future attosecond quantum operations on DQD qubits.Furthermore, we will investigate quantum circuit design and develop quantum error correction techniques to minimize errors in theDQD qubit platform. The project combines theoretical investigations with the experimental capabilities of the KCL host group tooptimize system parameters, improve coherence times, and enhance control over the proposed DQD qubit platform. Additionally, wewill investigate quantum resources, such as entanglement and discord-like correlations, in bipartite DQD qubits. By proposing the useof the quantum path interferometric technique based on High Harmonic Generation (HHG) for atto-qgate readout, this projectbridges the fields of attosecond physics and quantum technology, enabling significant advancements in attosecond quantuminformation processing.