Non-equilibrium Properties and Transport

Chiao-Hsuan Wang, Jacob M. Taylor

K. Kikoin, Mikhail N. Kiselev, Y. Avishai

Youqi Ke, Sheng Meng, Ke Xia +1 more

Under external driving forces, the system deviates from the equilibrium distribution and enters a non-equilibrium state, resulting in transport phenomena of both charge and energy and the emergence of many novel non-equilibrium phases. The transport of charge and energy through a quantum many-body material system is a fundamental process in the conversion and storage of energy and information, and material properties can undergo significant changes at the far-from-equilibrium conditions. A deep understanding and accurate calculation of non-equilibrium states in materials and devices, including transport properties, are essential for enhancing the control of material properties and advancing the related manufacturing technologies, constituting a key aspect of condensed matter physics and computational physics.

Malte Henkel, Haye Hinrichsen, Sven Lübeck

Masahiko Okumura, Hiroaki Onishi, S Yamada +1 more

We study non-equilibrium properties of one-dimensional Hubbard model by the density-matrix renormalization-group method. First, we demonstrate stability of "doublon", which characterized by double occupation on a site due to the integrability of the model. Next, we present a kind of anomalous transport caused by the doublons created under strong non-equilibrium conditions in an optical lattice system regarded as an ideal testbed to investigate fundamental properties of the Hubbard model. Finally, we give a result on development of the pair correlation function in a strong non-equilibrium condition. This can be understood as a development of coherence among many excited doublons.