论文标题
使用被困离子的绝热感测技术，用于最佳温度估算
Adiabatic Sensing Technique for Optimal Temperature Estimation using Trapped Ions
论文作者
论文摘要
我们提出了一种充满绝热的方法，用于使用被困离子可以在羔羊dicke制度之外操作的最佳声子温度估计。量子传感技术依赖于时间依赖的声子模式的红色边缘过渡，该模式通常由非线性Jaynes-Cummings模型描述。我们的传感技术的一个独特特征是，可以将声子热分布的相关信息传递到自由的集体自旋度。我们表明，每个热状态概率都是绝热映射到相应的集体自旋兴奋构型上的，因此温度估计仅通过在绝热过渡末端进行自旋依赖性激光荧光测量来进行。我们在Fisher信息方面表征了温度不确定性，并表明状态投影测量使基本的量子cramér-rao饱和，以在热平衡处使用量子振荡器。
We propose an adiabatic method for optimal phonon temperature estimation using trapped ions which can be operated beyond the Lamb-Dicke regime. The quantum sensing technique relies on a time-dependent red-sideband transition of phonon modes, described by the non-linear Jaynes-Cummings model in general. A unique feature of our sensing technique is that the relevant information of the phonon thermal distributions can be transferred to the collective spin-degree of freedom. We show that each of the thermal state probabilities is adiabatically mapped onto the respective collective spin-excitation configuration and thus the temperature estimation is carried out simply by performing a spin-dependent laser fluorescence measurement at the end of the adiabatic transition. We characterize the temperature uncertainty in terms of the Fisher information and show that the state projection measurement saturates the fundamental quantum Cramér-Rao bound for quantum oscillator at thermal equilibrium.
