Golubev Dmitry S, Zaikin Andrei D
QTF Centre of Excellence, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland.
I.E. Tamm Department of Theoretical Physics, P.N. Lebedev Physical Institute, 119991 Moscow, Russia.
Beilstein J Nanotechnol. 2023 Jan 9;14:61-67. doi: 10.3762/bjnano.14.7. eCollection 2023.
Electrons in two different normal metallic electrodes attached to a sufficiently thin superconducting island may become entangled due to the effect of Cooper pair splitting. This phenomenon is of fundamental importance and may also have serious implications for developing quantum communication technologies. One way to identify Cooper pair splitting is to analyze long-range cross correlations of fluctuating currents in three-terminal hybrid normal-superconducting-normal nanostructures. Here, we theoretically investigate non-trivial behavior of cross-correlated non-local shot noise in the presence of a temperature gradient. We suggest that applying a temperature gradient may serve as an extra tool to control the phenomenon of Cooper pair splitting.
附着在足够薄的超导岛上的两个不同正常金属电极中的电子，可能会由于库珀对分裂效应而纠缠在一起。这种现象具有根本重要性，并且可能对量子通信技术的发展也有严重影响。识别库珀对分裂的一种方法是分析三端混合正常 - 超导 - 正常纳米结构中波动电流的长程交叉关联。在这里，我们从理论上研究了存在温度梯度时交叉关联的非局部散粒噪声的非平凡行为。我们认为施加温度梯度可以作为控制库珀对分裂现象的额外工具。
