Reconstructing the quantum state of oscillator networks with a single qubit
Reconstructing the quantum state of oscillator networks with a single qubit
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用单个量子位重建振荡器网络的量子态
DOI：
10.1103/physreva.85.032334
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发表时间：
2012
影响因子：
2.9
通讯作者：
Tufarelli T
中科院分区：
文献类型：
--
作者：
Tufarelli T
我们介绍了一种重建由量子振子组成的网络的任意态的方案--例如，囚禁离子的运动态或耦合腔的辐射态。该方案涉及最少的资源和最少的访问，因为它(I)只需要一个一量子比特的探测器与网络的单个节点之间的相互作用；(Ii)直接从数据提供网络的Weyl特征函数，避免任何层析变换；(Iii)只涉及一个耦合参数的调节。此外，我们还证明了可以在不完全重构状态的情况下提取一些量子属性。该方案可用于探索非谐多体系统的量子模拟和连续变量的量子计算。还讨论了利用俘获离子的实验实现，并表明它在当前技术的范围内。
We introduce a scheme to reconstruct arbitrary states of networks composed of quantum oscillators—e.g., the motional state of trapped ions or the radiation state of coupled cavities. The scheme involves minimal resources and minimal access, in the sense that it (i) requires only the interaction between a one-qubit probe and a single node of the network; (ii) provides the Weyl characteristic function of the network directly from the data, avoiding any tomographic transformation; (iii) involves the tuning of only one coupling parameter. In addition, we show that a number of quantum properties can be extracted without full reconstruction of the state. The scheme can be used for probing quantum simulations of anharmonic many-body systems and quantum computations with continuous variables. Experimental implementation with trapped ions is also discussed and shown to be within reach of current technology.
影响因子：
8.6
作者：
R. Schützhold;M. Uhlmann;L. Petersen;H. Schmitz;A. Friedenauer;T. Schätz
通讯作者：
R. Schützhold;M. Uhlmann;L. Petersen;H. Schmitz;A. Friedenauer;T. Schätz
用于连续变量量子计算的有隙二体哈密顿量。
影响因子：
8.6
作者：
L. Aolita;A. Roncaglia;A. Ferraro;A. Acín
通讯作者：
A. Acín