NOON States of Nine Quantized Vibrations in Two Radial Modes of a Trapped Ion
NOON States of Nine Quantized Vibrations in Two Radial Modes of a Trapped Ion
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俘获离子两种径向模式下九个量子化振动的中午状态
DOI：
10.1103/physrevlett.121.160502
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发表时间：
2018
影响因子：
8.6
通讯作者：
Kim Kihwan
中科院分区：
文献类型：
--
作者：
Zhang Junhua;Um Mark;Lv Dingshun;Zhang Jing-Ning;Duan Lu-Ming;Kim Kihwan
我们开发了一种确定性的方法来生成和验证任意高的NOON态的量子化振动（声子），通过耦合到内部状态。我们在实验上用一个陷波子的两个振动模在声子上产生了纠缠态。我们观察到随着声子数目的增加，产生的NOON态的相位灵敏度增加，并通过双模投影测量从相位干涉的对比度和声子态的布居获得保真度，它们明显高于经典界。我们还测量了生成态的量子Fisher信息，并观察到海森堡标度在相位灵敏度的下限随着增加。我们的方案是通用的，适用于其他光子或声子系统，如电路QED系统或纳米机械振荡器，其中有Jaynes-Cummings型的相互作用。
We develop a deterministic method to generate and verify arbitrarily high NOON states of quantized vibrations (phonons), through the coupling to the internal state. We experimentally create the entangled states up tophonons in two vibrational modes of a single trappedion. We observe an increasing phase sensitivity of the generated NOON state as the number of phononsincreases and obtain the fidelity from the contrast of the phase interference and the population of the phonon states through the two-mode projective measurement, which are significantly above the classical bound. We also measure the quantum Fisher information of the generated state and observe Heisenberg scaling in the lower bounds of phase sensitivity asincreases. Our scheme is generic and applicable to other photonic or phononic systems such as circuit QED systems or nanomechanical oscillators, which have Jaynes-Cummings-type of interactions.