Probing Quantitatively Two-electron Entanglement with a Spintronic Quantum Eraser

Abstract

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

References in corpus (4)

• Steering, Entanglement, Nonlocality, and the EPR Paradox
• Production and detection of entangled electron-hole pairs in a degenerate electron gas
• Semiconductor few-electron quantum dot operated as a bipolar spin filter
• Electronic Hong-Ou-Mandel interferometer for multi-mode entanglement detection

Cited by in corpus (5)

• An Electronic Quantum Eraser
• Long-range Cooper pair splitter with high entanglement production rate
• Probing individual split Cooper-pairs using the spin qubit toolkit
• Entanglement of Nambu Spinors and Bell Inequality Test Without Beam Splitters
• Entanglement of magnetic impurities through electron scattering in an electric field