Electron entanglement detected by quantum spin Hall systems |
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Authors: | Wei Chen R Shen L Sheng B G Wang D Y Xing |
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Affiliation: | National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China. |
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Abstract: | We propose a promising electron entanglement detector consisting of two quantum spin Hall systems weakly coupled to a superconductor. The detection of electron spins along various polarization directions, which is a prerequisite for testing Bell's inequality on solid state spins, can be achieved in an all-electrical-controlled manner utilizing the helical edge states. It is found that the violation of Bell's inequality exists in a large range of the tunneling parameters, which can be realized in mercury telluride quantum wells. |
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