基于非线性量子能量泵的可编程海森堡极限传感器
Programmable Heisenberg-limit sensor from a nonlinear quantum energy pump
AI总结：
该研究提出基于非线性量子能量泵的可编程海森堡极限玻色量子传感器，构建最优传感协议并通过数值模拟验证其鲁棒性，实现多参数信号的高精度计量。
AI中文摘要：
我们提出一种基于非线性量子能量泵的可编程玻色量子传感器，该传感器由克尔非线性谐振器与多个高品质因子（high-Q）微波终端谐振器耦合实现。针对作用于终端模式的任意粒子数守恒哈密顿量所编码的参数估计，我们解析构建了能达到最大量子费舍尔信息的最优传感协议，涵盖初始态加载、探针制备与读出环节。对于对角多参数信号，我们进一步证明，可通过局部测量物理终端功的关联获取完整的相位传感量子费舍尔信息矩阵，从而实现计量资源的无信号校准。我们采用实际电路量子电动力学（circuit-QED）参数，结合实验相关的非理想因素，数值验证了该协议的构建及其鲁棒性。
英文摘要：
We introduce a programmable Heisenberg-limited bosonic quantum sensor based on a nonlinear quantum energy pump, implemented with a Kerr-nonlinear resonator coupled to multiple high-Q microwave terminal resonators. For parameter estimation encoded in an arbitrary number-conserving Hamiltonian acting on the terminal modes, we analytically construct optimal sensing protocols that attain the maximal quantum Fisher information, including initial-state loading, probe preparation, and readout. For diagonal multiparameter signals, we further show that the full phase-sensing quantum Fisher information matrix can be obtained from correlations of locally measured physical terminal works, providing a signal-free calibration of the metrological resource. We numerically demonstrate the construction and its robustness using realistic circuit-QED parameters while including experimentally relevant imperfections.
