Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
TT 46.13: Poster
Mittwoch, 18. März 2020, 15:00–19:00, P2/2OG
The repulsive interactions of the elastic quantum strings. — •Xue-Feng Zhang — Department of Physics, Chongqing University, Chongqing, 401331, China
The elastic quantum string is the quantum topological defects exist not only in the high-Tc superconductivity , but also in the frustrated system, such as the hard-core boson on the Kagome lattice [2,3], anisotropic triangular lattice  and spin half Ising model with long range interaction in the transverse magnetic field . In this work, we study the repulsive interaction between effective closed strings defined on the bonds of the titled square lattice. By using the large-scale high accuracy exact diagonalization (ED) (error less than 10−28), we find the effective repulsive interactions between the strings are approximately exponential decaying with form V(r)≈exp(−kr2), where r is the distance between strings.
 B-X Zheng, et. al, Science 358, 1155 (2017)
 X.-F. Zhang, and S. Eggert, Phys. Rev. Lett. 111, 147201 (2013)
 X.-F. Zhang, Y.-C. He, S. Eggert, R. Moessner, and F. Pollmann Phys. Rev. Lett. 120, 115702 (2018)
 X.-F. Zhang, S.-J. Hu, A. Pelster and S. Eggert Phys. Rev. Lett. 117, 193201 (2016)
 Z. Zhou, Z. Yan, D.-X. Liu, Y. Chen and X.-F. Zhang ongoing work