https://scholars.lib.ntu.edu.tw/handle/123456789/606835
標題: | Two-wire junction of inequivalent Tomonaga-Luttinger liquids | 作者: | Kang Y.-T Lo C.-Y Oshikawa M Kao Y.-J Chen P. YING-JER KAO |
關鍵字: | Bias voltage; Bosonization; Correlation function; Current-current correlations; Current-voltage characteristics; Linear response; Numerical scheme; Static currents; Time-dependent currents; Tomonaga Luttinger liquid; Voltage bias; Current voltage characteristics | 公開日期: | 2021 | 卷: | 104 | 期: | 23 | 來源出版物: | Physical Review B | 摘要: | We develop two numerical schemes to study the conductance of the two-wire junction of inequivalent Tomonaga-Luttinger liquids. In the first scheme we use the static current-current correlation function across the junction to extract the linear conductance through a relation that is derived via the bosonization method. In the second scheme we apply a voltage bias and evaluate the time-dependent current across the junction to obtain the current-voltage characteristic. The conductance is then extracted from the small bias result within the linear response regime. Both schemes are based on the infinite-size matrix product state to minimize the finite-size effects. Due to the lack of the translational invariance, we focus on a finite-size window containing the junction. For time-independent calculations, we use infinite boundary conditions to evaluate the correlations within the window. For time-dependent calculations, we use the window technique to evaluate the local currents within the window. The numerical results obtained by both schemes show excellent agreement with the analytical predictions. Published by the American Physical Society |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122102418&doi=10.1103%2fPhysRevB.104.235142&partnerID=40&md5=6154854c54dbd9240b4c6e04478fb779 https://scholars.lib.ntu.edu.tw/handle/123456789/606835 |
ISSN: | 24699950 | DOI: | 10.1103/PhysRevB.104.235142 |
顯示於: | 物理學系 |
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