Zobrazeno 1 - 10
of 183
pro vyhledávání: '"Haghshenas R"'
Publikováno v:
Phys. Rev. B 106, 174419 (2022)
In frustrated spin ladders the interplay of frustration and correlations leads to the familiar Haldane (H) and rung-singlet (RS) phases. The nature of the transition between these two phases is still under debate. In this paper we tackle this issue u
Externí odkaz:
http://arxiv.org/abs/2106.07940
Publikováno v:
Phys. Rev. B 100, 054404 (2019)
We propose an algorithm to convert a projected entangled pair state (PEPS) into a canonical form, analogous to the well-known canonical form of a matrix product state. Our approach is based on a variational gauging ansatz for the QR tensor decomposit
Externí odkaz:
http://arxiv.org/abs/1903.03843
Publikováno v:
Phys. Rev. B 99, 144414 (2019)
We investigate the ground-state phase diagram of the frustrated transverse field Ising (TFI) model on the checkerboard lattice (CL), which consists of N\'{e}el, collinear, quantum paramagnet and plaquette-valence bond solid (VBS) phases. We implement
Externí odkaz:
http://arxiv.org/abs/1901.00278
Publikováno v:
Phys. Rev. B 99, 174423 (2019)
We study the antiferromagnetic kagome Heisenberg model with additional scalar-chiral interaction by using the infinite projected entangled-pair state (iPEPS) ansatz. We discuss in detail the implementation of optimization algorithm in the framework o
Externí odkaz:
http://arxiv.org/abs/1812.11436
Publikováno v:
Phys. Rev. B 97, 184436 (2018)
We study the spin-$1$ Heisenberg model on the square lattice with the antiferromagnetic nearest-neighbor $J_1$ and the next-nearest-neighbor $J_2$ couplings by using the infinite projected entangled-pair state (iPEPS) ansatz and density matrix renorm
Externí odkaz:
http://arxiv.org/abs/1802.00874
Autor:
Haghshenas, R., Sheng, D. N.
Publikováno v:
Phys. Rev. B 97, 174408 (2018)
We develop an improved variant of $U(1)$-symmetric infinite projected entangled-pair state (iPEPS) ansatz to investigate the ground state phase diagram of the spin-$1/2$ square $J_{1}-J_{2}$ Heisenberg model. In order to improve the accuracy of the a
Externí odkaz:
http://arxiv.org/abs/1711.07584
Publikováno v:
Phys. Rev. B 94, 214419 (2016)
We investigate the ground state nature of the transverse field Ising model on the $J_1-J_2$ square lattice at the highly frustrated point $J_2/J_1=0.5$. At zero field, the model has an exponentially large degenerate classical ground state, which can
Externí odkaz:
http://arxiv.org/abs/1611.08298
Publikováno v:
J. Phys.: Condens. Matter 28 (2016) 176001
We characterize phases of the compass ladder model by using degenerate perturbation theory, symmetry fractionalization, and numerical techniques. Through degenerate perturbation theory we obtain an effective Hamiltonian for each phase of the model, a
Externí odkaz:
http://arxiv.org/abs/1509.00207
Publikováno v:
Phys. Rev. B 91, 024415 (2015)
We study the interplay between the Kitaev and Ising interactions on both ladder and two dimensional lattices. We show that the ground state of the Kitaev ladder is a symmetry-protected topological (SPT) phase, which is protected by a $\mathbb{Z}_2 \t
Externí odkaz:
http://arxiv.org/abs/1410.2025
Publikováno v:
J. Phys.: Condens. Matter 26 (2014) 456001
We study different phases of the one-dimensional bond-alternating spin-$1/2$ Heisenberg model by using the symmetry fractionalization mechanism. We employ the infinite matrix-product state representation of the ground state (through the infinite-size
Externí odkaz:
http://arxiv.org/abs/1405.3047