Università di Parma, Dipartimento di Scienze Matematiche, Fisiche e Informatiche, I-43124, Parma, Italy.
INFN-Sezione di Milano-Bicocca, gruppo collegato di Parma, 43124, Parma, Italy.
Adv Mater. 2023 Jul;35(28):e2300472. doi: 10.1002/adma.202300472. Epub 2023 May 12.
Molecular spins are promising building blocks of future quantum technologies thanks to the unparalleled flexibility provided by chemistry, which allows the design of complex structures targeted for specific applications. However, their weak interaction with external stimuli makes it difficult to access their state at the single-molecule level, a fundamental tool for their use, for example, in quantum computing and sensing. Here, an innovative solution exploiting the interplay between chirality and magnetism using the chirality-induced spin selectivity effect on electron transfer processes is foreseen. It is envisioned to use a spin-to-charge conversion mechanism that can be realized by connecting a molecular spin qubit to a dyad where an electron donor and an electron acceptor are linked by a chiral bridge. By numerical simulations based on realistic parameters, it is shown that the chirality-induced spin selectivity effect could enable initialization, manipulation, and single-spin readout of molecular qubits and qudits even at relatively high temperatures.
分子自旋是未来量子技术有前途的构建块，这要归功于化学提供的无与伦比的灵活性，化学允许设计针对特定应用的复杂结构。然而，它们与外部刺激的弱相互作用使得难以在单分子水平上访问它们的状态，这是它们在量子计算和传感等方面使用的基本工具。在这里，预计会利用手性和磁性之间的相互作用来解决这个问题，使用手性诱导自旋选择性效应来影响电子转移过程。预计将使用自旋到电荷转换机制，通过将分子自旋量子位连接到偶联物来实现该机制，其中电子给体和电子受体通过手性桥连接。通过基于实际参数的数值模拟，表明手性诱导的自旋选择性效应可以实现分子量子比特和量子位的初始化、操纵和单自旋读出，即使在相对较高的温度下也是如此。
