Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Cho, Sam Young"'
Quantum phase transitions (QPTs) between uniaxial or biaxial spin nematic (SN) phases are investigated in biquadratic spin-1 and spin-2 XY infinite chains with the rhombic- and uniaxial-type single-ion anisotropies. Systematic discussions of distinct
Externí odkaz:
http://arxiv.org/abs/2410.11609
Publikováno v:
Phys. Rev. B 103, 014446 (2021)
We investigate quantum phase transitions and quantum coherence in infinite biquadratic spin-1 and -2 XY chains with rhombic single-ion anisotropy. All considered coherence measures such as the $l_1$ norm of coherence, the relative entropy of coherenc
Externí odkaz:
http://arxiv.org/abs/2010.01812
We study the mutual information between two lattice-blocks in terms of von Neumann entropies for one-dimensional infinite lattice systems. Quantum $q$-state Potts model and transverse field spin-$1/2$ XY model are considered numerically by using the
Externí odkaz:
http://arxiv.org/abs/2005.07924
We have studied the phase singularity of the relativistic vortex beams for the two sets of relativistic operators. One includes the new spin and orbital angular momentum (OAM) operators, which is derived from the parity-extended Poincar\'e group, and
Externí odkaz:
http://arxiv.org/abs/1902.09805
Autor:
Choi, Taeseung, Cho, Sam Young
We present the rigorous derivation of covariant spin operators from a general linear combination of the components of the Pauli-Lubanski vector. It is shown that only two spin operators satisfy the spin algebra and transform properly under the Lorent
Externí odkaz:
http://arxiv.org/abs/1807.06425
We numerically investigate classical and quantum correlations in one-dimensional quantum critical systems. The infinite matrix product state (iMPS) representation is employed in order to consider an infinite-size spin chain. By using the infinite tim
Externí odkaz:
http://arxiv.org/abs/1805.03464
Publikováno v:
Phys. Rev. B 95, 214409 (2017)
The finite temperature phase diagram is obtained for an infinite honeycomb lattice with spin-$1/2$ Ising interaction $J$ by using thermal-state fidelity and von Neumann entropy based on the infinite projected entangled pair state algorithm with ancil
Externí odkaz:
http://arxiv.org/abs/1611.10072
Publikováno v:
Phys. Rev. B 95, 014419 (2017)
The von Neumann entanglement entropy is used to estimate the critical point $h_c/J \simeq 0.143(3)$ of the mixed ferro-antiferromagnetic three-state quantum Potts model $H = \sum_i [ J ( X_i X_{i+1}^{\,2} + X_i^{\,2} X_{i+1} ) - h\, R_i ]$, where $X_
Externí odkaz:
http://arxiv.org/abs/1608.04960
Autor:
Shi, Qian-Qian, Wang, Hong-Lei, Li, Sheng-Hao, Cho, Sam Young, Batchelor, Murray T., Zhou, Huan-Qiang
Publikováno v:
Phys. Rev. A 93, 062341 (2016)
Geometric entanglement(GE), as a measure of multipartite entanglement, has been investigated as a universal tool to detect phase transitions in quantum many-body lattice models. We outline a systematic method to compute GE for two-dimensional (2D) qu
Externí odkaz:
http://arxiv.org/abs/1604.07278
Publikováno v:
J. Korean Phys.Soc. 68,1114 (2016)
We investigate the phase diagram of the cross-coupled Heisenberg spin ladder with antiferromagnetic couplings. For this model there have been conflicting results for the existence of the columnar dimer phase, which was predicted on the basis of weak
Externí odkaz:
http://arxiv.org/abs/1508.03941