Beilstein J. Nanotechnol.2023,14, 61–67, doi:10.3762/bjnano.14.7
Moscow, Russia 10.3762/bjnano.14.7 Abstract Electrons in two different normal metallic electrodes attached to a sufficiently thin superconducting island may become entangled due to the effect of Cooperpairsplitting. This phenomenon is of fundamental importance and may also have serious implications
for developing quantum communication technologies. One way to identify Cooperpairsplitting 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 Cooperpairsplitting.
Keywords: Cooperpairsplitting; entanglement; quantum shot noise; superconducting hybrid nanostructures
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Figure 1:
Schematics of the processes of crossed Andreev reflection (a) and elastic cotunneling (b). These sc...
Beilstein J. Nanotechnol.2012,3, 493–500, doi:10.3762/bjnano.3.56
pair splitters, that can otherwise only be realized by using p-wave superconductors. In particular, it provides access to Bell states that are different from the typical spin singlet state.
Keywords: Cooperpairsplitting; entanglement; Hamiltonian approach; spin-active scattering; superconductivity
been successfully realized in experiments [20][21][22] and a nonlocal resistance has been measured as a characteristic of Cooperpairsplitting. Moreover, a positive cross correlation measured in a superconductor and normal-metal three-terminal device gave compelling evidence for CAR [23]. However, s
pair splitter represents the essential counterpart to s-wave Cooper pair splitters as on-chip sources of spin-entangled Einstein–Podolsky–Rosen (EPR) electron pairs [24][25][26].
In this paper we approach the problem of p-wave Cooperpairsplitting in two steps. First, we show that p-wave splitting may
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Figure 1:
Summary of the possible charge-transfer processes in a superconductor–ferromagnet beam splitter. Th...