Issue |
EPL
Volume 96, Number 4, November 2011
|
|
---|---|---|
Article Number | 40011 | |
Number of page(s) | 6 | |
Section | General | |
DOI | https://doi.org/10.1209/0295-5075/96/40011 | |
Published online | 09 November 2011 |
Markovian and non-Markovian effects on the geometric phase of a dissipative Josephson qubit
Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University - Wuhan 430072, PRC
Received:
7
June
2011
Accepted:
26
September
2011
Geometric phases are investigated for a Josephson qubit interacting with the Markovian and non-Markovian environments at arbitrary temperature according to a kinematic approach. In order to obtain the condition allowing experimental observation of geometric phase, we also estimate the decoherence times. The result shows that the Aharonov-Anandan phase may be different from the Berry phase under the environment perturbations. By comparing with the numerical result of the geometric phase as a function of the initial angle, we find that at low temperature, the effect of Markovian environment is larger than the non-Markovian one on the geometric phase. An approach is proposed to understand the accumulative effects of the geometric phase and its robustness to high-frequency noise, which may be helpful for geometric quantum information processing.
PACS: 03.65.Vf – Phases: geometric; dynamic or topological / 03.65.Yz – Decoherence; open systems; quantum statistical methods / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.