Loading...
Observation of coherent oscillation in single-passage Landau-Zener transitions
Sun, Guozhu Wen, Xueda Gong, Ming Zhang, Dan-Wei Yu, Yang Zhu, Shi-Liang Chen, Jian Wu, Peiheng Han, Siyuan
Sun, Guozhu
Wen, Xueda
Gong, Ming
Zhang, Dan-Wei
Yu, Yang
Zhu, Shi-Liang
Chen, Jian
Wu, Peiheng
Han, Siyuan
Citations
Altmetric:
Abstract
Landau-Zener transition (LZT) has been explored in a variety of physical systems for coherent population transfer between different quantum states. In recent years, there have been various proposals for applying LZT to quantum information processing because when compared to the methods using ac pulse for coherent population transfer, protocols based on LZT are less sensitive to timing errors. However, the effect of finite range of qubit energy available to LZT based state control operations has not been thoroughly examined. In this work, we show that using the well-known Landau-Zener formula in the vicinity of an avoided energy-level crossing will cause considerable errors due to coherent oscillation of the transition probability in a single-passage LZT experiment. The data agree well with the numerical simulations which take the transient dynamics of LZT into account. These results not only provide a closer view on the issue of finite-time LZT but also shed light on its effects on the quantum state manipulation.
Description
Date
2015-02-16
Journal Title
Journal ISSN
Volume Title
Publisher
Macmillian Publishers
Collections
Research Projects
Organizational Units
Journal Issue
Keywords
Citation
Sun, et, al. "Observation of coherent oscillation in single-passage Landau-Zener transitions." Sci Rep. 2015; 5: 8463. Published online 2015 February 16.
http://dx.doi.org/10.1038/srep08463