Weak measurement induced asymmetric quantum cloning. (6th July 2020)

• Record Type: Journal Article
• Authors: Fang, Bao-Long; Chen, Jiaojiao; Chen, Feng; Ye, Liu
• Is Part Of: Laser physics letters. Volume 17:Number 8(2020:Aug.)
• Publication Date: 2020-07-06
• Subjects: asymmetric quantum cloning -- weak measurement -- quantum cryptographic -- approximate quantum cloning; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/ab9901
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: Asymmetric quantum cloning (QC) is important for eavesdropping due to non-cloning quantum theorem. In this paper we propose a method to produce an asymmetric QC using weak measurement. Compared with previous proposals (1999 Phys. Rev. A 60 2764, 2004 Phy.s Rev. A 69 062316), the fidelity of one copy can be improved, while the other one reduces more smoothly. Also, the average fidelity of two copies can be raised.