Deterministic quantum state transfer from an electronic charge qubit to a photonic polarization qubit
Deterministic quantum state transfer from an electronic charge qubit to a photonic polarization qubit
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从电子电荷量子位到光子偏振量子位的确定性量子态转移
DOI：
10.1103/physrevb.73.121307
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发表时间：
2006
影响因子：
3.7
通讯作者：
C. Beenakker
中科院分区：
文献类型：
--
作者：
L. Ament;C. Beenakker
基于早期通过一对量子点中的带内跃迁产生偏振纠缠微波的提议，我们展示了如何使用该设备将未知的单量子位状态从电子电荷转移到光子偏振自由度。不需要后选择，这意味着量子状态转移是确定性发生的。随着退相干率的增加，电荷量子位的退相干导致转移态的保真度非单调衰减。
Building on an earlier proposal for the production of polarization-entangled microwaves by means of intraband transitions in a pair of quantum dots, we show how this device can be used to transfer an unknown single-qubit state from electronic charge to photonic polarization degrees of freedom. No postselection is required, meaning that the quantum state transfer happens deterministically. Decoherence of the charge qubit causes a non-monotonic decay of the fidelity of the transferred state with increasing decoherence rate.