Noise of Entangled Electrons: Bunching and Antibunching

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Abstract
Addressing the feasibility of quantum communication with entangled electrons we consider a scattering set-up with an entangler and beam splitter where the current noise exhibits bunching behavior for electronic singlet states and antibunching behavior for triplet states. The Fano factor (noise-to-current ratio) is calculated and shown to contain opposite signs for singlets and triplets. We further show that spin currents can produce noise even in the absence of any charge currents.

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