掲載種別：研究論文（学術雑誌）  

Abstract

The magnetization process of the S = 1/2 anisotropic spin ladder with the ferromagnetic rung interaction is investigated using the numerical diagonalization of finite-size clusters. It is found that the translational symmetry broken magnetization plateau would appear at half the saturation magnetization, when the competing anisotropies are sufficiently large. The phase diagram with respect to the anisotropies and several magnetization curves are presented.

DOI： 10.1088/1742-6596/3161/1/012004

その他URL： https://iopscience.iop.org/article/10.1088/1742-6596/3161/1/012004/pdf

掲載種別：研究論文（学術雑誌）  

DOI： 10.7566/JPSJ.94.124703

掲載種別：研究論文（学術雑誌）  

DOI： 10.1103/ljj8-tkpc

掲載種別：研究論文（学術雑誌）  

DOI： 10.1093/ptep/ptaf028

担当区分：筆頭著者,　責任著者   掲載種別：研究論文（学術雑誌）  

DOI： 10.1093/ptep/ptae137

Recent advances in combining Clifford circuits with tensor network (TN)
states have shown that classically simulable disentanglers can significantly
reduce entanglement, mitigating the bond-dimension bottleneck in TN
simulations. In this work, we develop a variational TN framework based on
Grassmann tensor networks, which natively encode fermionic statistics while
preserving locality. By incorporating locally defined Clifford circuits within
the fermionic formalism, we simulate benchmark models including the
tight-binding and $t$-$V$ models. Our results show that Clifford disentangling
removes the classically simulable component of entanglement, leading to a
reduced bond dimension and improved accuracy in ground-state energy estimates.
Interestingly, imposing the natural Grassmann-evenness constraint on the
Clifford circuits significantly reduces the number of disentangling gates, from
720 to just 32, yielding a far more efficient implementation. These findings
highlight the potential of Clifford-augmented Grassmann TNs as a scalable and
accurate tool for studying strongly correlated fermionic systems, particularly
in higher dimensions.

その他URL： http://arxiv.org/pdf/2510.04164v1

Dynamical mean-field theory (DMFT) is one of the most standard theoretical
frameworks for addressing strongly correlated electron systems. Meanwhile, the
concept of holography, developed in the field of quantum gravity, provides an
intrinsic relationship between quantum many-body systems and space-time
geometry. In this study, we demonstrate that these two theories are closely
related to each other by shedding light on holographic aspects of DMFT,
particularly for electrons with a semicircle density of states. We formulate a
holographic renormalization group for the branch Green's function from the
outer edge to the interior of the Bethe lattice network, and then find that its
fixed point can be interpreted as a self-consistent solution of Green's
function in DMFT. By introducing an effective two-dimensional anti-de Sitter
space, moreover, we clarify that the scaling dimensions for the branch Green's
function and the boundary correlation functions of electrons at the outer edge
of the Bethe lattice network are characterized by the fixed-point Green's
function. We also perform DMFT computations for the Bethe-lattice Hubbard
model, which illustrate that the scaling dimensions capture the Mott transition
in the deep interior.

その他URL： http://arxiv.org/pdf/2509.19704v1