Evanescent-field-modulated two-qubit entanglement in an emitters-plasmon coupled system. (2nd July 2018)

• Record Type: Journal Article
• Authors: Zhang, Fan; Ren, Juanjuan; Duan, Xueke; Chen, Zhao; Gong, Qihuang; Gu, Ying
• Is Part Of: Journal of physics. Volume 30:Number 30(2018)
• Publication Date: 2018-07-02
• Subjects: quantum entanglement -- surface plasmon -- evanescent field -- nanostructures; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aacc4f
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Scalable integrated quantum information network calls for controllable entanglement modulation at subwavelength scale. To reduce laser disturbance among adjacent nanostructures, here we theoretically demonstrate two-qubit entanglement modulated by an evanescent field of a dielectric nanowire in an emitter-AgNP coupled system. This coupled system is considered as a nano-cavity system embedded in an evanescent vacuum. Through varying the amplitude of evanescent field, the concurrence of steady-state entanglement can be modified from 0 to 0.75. Because the interaction between emitters and the nanowire is much weaker than that inside the coupled system, the range of modulation for two-qubit entanglement is insensitive to their distance. The evanescent field controlled entangled state engineering provides the possibility to avoid optical crosstalk for on-chip steady-state entanglement.