【摘 要】
：
We propose an optimized cluster density matrix embedding theory (CDMET).It reduces the computational cost of CDMET with simpler bath states.And the result is as accurate as the original one.As a demonstration,we study the distant correlations of the Heise
【机 构】
：
Department of Physics,Wuhan University,Wuhan 430072,China
论文部分内容阅读
We propose an optimized cluster density matrix embedding theory (CDMET).It reduces the computational cost of CDMET with simpler bath states.And the result is as accurate as the original one.As a demonstration,we study the distant correlations of the Heisenberg J1-J2 model on the square lattice.We find that the intermediate phase (0.43 (～＜) J2 (＜～) 0.62) is divided into two parts.One part is a near-critical region (0.43 (～＜) J2 (～＜) 0.50).The other part is the plaquette valence bond solid (PVB) state (0.51 (～＜) J2 (～＜) 0.62).The spin correlations decay exponentially as a function of distance in the PVB.
其他文献
In the last decade,perovskite solar cells (PSCs) have greatly drawn researchers\' attention,with the power conversion efficiency surging from 3.8％ to 25.5％.PSCs possess the merits of low cost,simple fabrication process and high performance,which could b
Sulfur and lanthanum hydrides under compression display superconducting states with high observed critical temperatures.It has been recently demonstrated that carbonaceous sulfur hydride displays room temperature superconductivity.However,this phenomenon
Understanding the interplay between superconductivity and charge-density wave (CDW) in NbSe2 is vital for both fundamental physics and future device applications.Here,combining scanning tunneling microscopy,angle-resolved photoemission spectroscopy and Ra
We investigate the entanglement dynamics of two distinguishable two-level systems (TLSs) characterized by energy difference δ located inside a rectangular hollow metallic waveguide of transverse dimensions a and b.The effects of energy difference δ and th
Since Yukawa proposed that the pion is responsible for mediating the nucleon-nucleon interaction,meson ex-changes have been widely used in understanding hadron-hadron interactions.The most studied mesons are the σr,π,ρ,and ω,while other heavier mesons are
Quantum speed limit and entanglement of a two-spin Heisenberg XYZ system in an inhomogeneous external magnetic field are investigated.The physical system studied is the excess electron spin in two adjacent quantum dots.The influences of magnetic field inh
We report the production of 87Rb Bose-Einstein condensate in an asymmetric crossed optical dipole trap(ACODT) without the need of an additional dimple laser.In our experiment,the ACODT is formed by two laser beams with different radii to achieve efficient
Exploring two-dimensional (2D) magnetic heterostructures is essential for future spintronic and optoelectronic de-vices.Herein,using first-principle calculations,stable ferromagnetic ordering and colorful electronic properties are es-tablished by construc
Two-dimensional (2D) magnetic materials have aroused tremendous interest due to the 2D confinement of magnetism and potential applications in spintronic and valleytronic devices.However,most of the currently 2D magnetic materials are achieved by the exfol
Signatures of topological superconductivity (TSC) in superconducting materials with topological nontrivial states prompt intensive researches recently.Utilizing high-resolution angle-resolved photoemission spectroscopy and first-principles calculations,we