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We design an ingenious spintronic quantum eraser to quantitatively probe thetwo-electron entanglement. It is shown that the concurrence of twospin-entangled electrons is directly given by the Aharonov-Bohm oscillationamplitude of the Fano factor, a measurable current-current correlation, makingit rather promising to experimentally quantify the two-electron entanglement.The singlet and triplet entangled states are distinguished by the oppositesigns in the Fano factor. Since the main building blocks in the designed setup,an electronic Mach-Zehnder interferometer and a spin filter, have already beenimplemented, our proposal is particularly pertinent to experiments.

Probing Quantitatively Two-electron Entanglement with a Spintronic Quantum Eraser