Entangling electrons by splitting Cooper pairs: Two-particle conductanceresonance and time coincidence measurements
Entangling electrons by splitting Cooper pairs: Two-particle conductanceresonance and time coincidence measurements
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通过分裂库珀对来纠缠电子：双粒子电导共振和时间重合测量
DOI：
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
H. Shtrikman
中科院分区：
文献类型：
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作者：
A. Das;Y. Ronen;M. Heiblum;D. Mahalu;A. Kretinin;H. Shtrikman
纠缠是爱因斯坦-波多尔斯基-罗森（EPR）悖论的核心，是处理量子信息的必要成分。超导体中的库珀对--是两个完全纠缠的电子的复合物--可以被分裂，从而形成纠缠的电子。我们制作了这样的电子分裂器，通过在悬浮的InAs纳米线的中心接触铝超导带，两端用两个正常的金属漏。通过栅极诱导库仑阻塞量子点拦截纳米线的每一半，由于大的充电能量，强烈地阻碍了库珀对的流动，同时仍然允许单个电子通过。在这里，我们提供了确凿的证据，极高效率的库珀对分裂通过观察积极的平均值（电导）和时间（散粒噪声）的相关性的分裂电子在两个相反的纳米线的漏。此外，通过散粒噪声测量验证了注入准粒子的实际电荷。
Entanglement, being at the heart of the Einstein-Podolsky-Rosen (EPR) paradox, is a necessary ingredient in processing quantum information. Cooper pairs in superconductors - being composites of two fully entangled electrons - can be split adiabatically, thus forming entangled electrons. We fabricated such electron splitter by contacting an aluminum superconductor strip at the center of a suspended InAs nanowire; terminated at both ends with two normal metallic drains. Intercepting each half of the nanowire by gate - induced Coulomb blockaded quantum dot strongly impeded the flow of Cooper pairs due to large charging energy, while still permitting passage of single electrons. Here, we provide conclusive evidence of extremely high efficiency Cooper pairs splitting via observing positive average (conductance) and time (shot noise) correlations of the split electrons in the two opposite drains of the nanowire. Moreover, The actual charge of the injected quasiparticles was verified by shot noise measurements.
影响因子：
8.6
作者：
Herrmann, L. G.;Portier, F.;Strunk, C.
通讯作者：
Strunk, C.