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5 papers · 2 filters
Quantum Non-Magnetic state near Metal-Insulator Transition - a Possible Candidate of Spin Liquid State
Gao-Yong Sun, Su-Peng Kou
In this paper, based on the formulation of an O(3) non-linear sigma model, we study the two-dimensional Pi-flux Hubbard model at half-filling. A quantum non-magnetic insulator is e…
Quantum transfer matrix method for one-dimensional disordered electronic systems
Li-Ping Yang, Yong-Jun Wang, Wen-Hu Xu +2
We develop a novel quantum transfer matrix method to study thermodynamic properties of one-dimensional (1D) disordered electronic systems. It is shown that the partition function c…
Spin-charge Separation in Nodal Antiferromagnetic Insulator
Su-Peng Kou
In this paper, by using two dimensional (2D) Hubbard models with pi-flux phase and that on a hexagonal lattice as examples, we explore spin-charge-separated solitons in nodal antif…
Non-Markovian shot noise spectrum of quantum transport through quantum dots
Jinshuang Jin, Xin-Qi Li, Meng Luo +1
The generalized quantum master equation with transport particle number resolution, like its conventional unconditioned counterpart, has also the time-local and time-nonlocal prescr…
Mutual Chern-Simons theory for Z_2 topological order
Su-Peng Kou, Michael Levin, Xiao-Gang Wen
We study several different topological ordered states in frustrated spin systems. The effective theories for those different Z_2 topological orders all have the same form --…