标题： 自旋-轨道耦合的量子增强感知无需精细调节 显示英文标题

标题： Quantum-enhanced sensing of spin-orbit coupling without fine-tuning

摘要： 自旋-轨道耦合在基础物理和技术应用中都起着重要作用。 精确估计自旋-轨道耦合对于在各种物理设置中进行准确设计是必要的，例如固态器件和量子硬件。 在这里，我们利用一维量子线中的量子特性，以超越经典探测器能力的增强灵敏度来估计Rashba自旋-轨道耦合。 在整个参数范围内实现了海森堡极限的增强精度，并不需要精细调节。 这种优势直接与探测器在整个相关参数范围内的能隙闭合特性有关。 这提供了明显的优势，相对于传统的基于临界性的量子传感器，在这些传感器中，量子增强的灵敏度只能通过在相变点附近的精细调节来实现。 我们已经展示了单粒子和相互作用多体探测器的量子增强灵敏度。 除了将我们的结果扩展到热态和多参数场景，我们还提供了一个测量基来实现接近最终精度的测量。 显示英文摘要

摘要： Spin-orbit coupling plays an important role in both fundamental physics and technological applications. Precise estimation of the spin-orbit coupling is necessary for accurate designing across various physical setups such as solid state devices and quantum hardware. Here, we exploit quantum features in a 1D quantum wire for estimating the Rashba spin-orbit coupling with enhanced sensitivity beyond the capability of classical probes. The Heisenberg limited enhanced precision is achieved across a wide range of parameters and does not require fine tuning. Such advantage is directly related to the gap-closing nature of the probe across the entire relevant range of parameters. This provides clear advantage over conventional criticality-based quantum sensors in which quantum enhanced sensitivity can only be achieved through fine-tuning around the phase transition point. We have demonstrated quantum enhanced sensitivity for both single particle and interacting many-body probes. In addition to extending our results to thermal states and the multi-parameter scenario, we have provided an measurement basis to perform close to the ultimate precision.