Non-leaky population transfer in a transmon artificial atom. (18th December 2017)

• Record Type: Journal Article
• Authors: Yan, Run-Ying; Li, M; Zhao, Z Y; Lu, Xiao-Jing; Feng, Zhi-Bo
• Is Part Of: Laser physics letters. Volume 15:Number 1(2018:Jan.)
• Publication Date: 2017-12-18
• Subjects: population transfer -- quantum leakage effect -- transmon circuit; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aa877e
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We propose a theoretical scheme to implement non-leaky population transfer in a transmon-regime artificial atom. Due to the weak level anharmonicity of the transmon system, resonant driving leads to considerable quantum leakage. Facilitated by the level-transition rule, we develop a Λ-type interaction between the first three levels and the driving fields. Under two-photon resonance with large detuning, a reduced two-level system is obtained, with which we perform non-leaky population transfer by adjusting the microwave driving. With the accessible parameters, we further analyse the flexible reversibility and high robustness of the protocol. The present scheme provides a potential approach to optimizing population transfer with transmon artificial atoms.