EPL, 82 (2008) 10005
DOI: 10.1209/0295-5075/82/10005

A proposal for detecting spin-entangled electrons using the Berry phase

Xuean Zhao^{1, 2}, T. C. Au Yeung¹, Ya-Bin Yu¹, C. H. Kam¹ and You-Quan Li<sup>2

1</sup>  School of electric and electronic engineering, NanYang Technological University - Singapore
²  Zhejiang Institute of Modern Physics, Zhejiang University - Zhejiang, Hangzhou 310027, China

zhaoxa@zju.edu.cn

received 28 December 2007; accepted in final form 13 February 2008; published April 2008
published online 17 March 2008

Abstract
We are motivated by a setup proposed by J. Carlos Egues et al. (Phys. Rev. Lett., 89 (2002) 176401) to investigate correlations of entangled electron pairs in the presence of two rotating magnetic fields. Using the scattering approach we show that the entangled electron pairs just like a composite particle. The singlet and triplet states show different bunching and anti-bunching behaviors, which can be easily controlled by the magnetic fields. The results can be demonstrated by using a coincident technique. The correlations show up at characteristic output signals for different states.

PACS
03.65.Vf - Phases: geometric; dynamic or topological.
72.25.Dc - Spin polarized transport in semiconductors.
03.65.Ud - Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.).

© EPLA 2008