We present a protocol to produce a class of non-thermal Fock state mixtures in trapped ions. This class of states features a clear metrological advantage with respect to the ground state, thus overcoming the standard quantum limit without the need for full sideband cooling and Fock-state preparation on a narrow electronic transition. The protocol consists in the cyclic repetition of red-sideband (RSB), measurement and preparation laser pulses. By means of the Kraus map representation of the protocol, it is possible to relate the length of the RSB pulses to the specific class of states that can be generated. With the help of numerical simulations, we analyse the parametric regime where these states can be reliably reproduced.

中文翻译：

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用于运动计量的捕获离子中福克混合物的生产


我们提出了一种在捕获离子中产生一类非热福克态混合物的协议。此类态相对于基态具有明显的计量优势，从而克服了标准量子极限，无需在窄电子跃迁上进行全边带冷却和福克态准备。该协议包括红边带 (RSB) 的循环重复、测量和准备激光脉冲。通过协议的克劳斯图表示，可以将 RSB 脉冲的长度与可以生成的特定状态类别相关联。在数值模拟的帮助下，我们分析了可以可靠地再现这些状态的参数状态。