【摘 要】
：
The valence-bond-solid (VBS) states for one-dimensional quantum integer spin-S chains as the simplest class of symmetry protected topological phases have a dege
【机 构】
：
DepartmentofPhysics,TsinghuaUniversity,Beijing100084,China
论文部分内容阅读
The valence-bond-solid (VBS) states for one-dimensional quantum integer spin-S chains as the simplest class of symmetry protected topological phases have a degeneracy (S + 1) in the entanglement spectrum.Under a non-local unitary transformation, we exactly calculate the spin probability distributions and the entanglement spectrum.For the odd-integer spins, the transformed VBS states become the ferromagnetic long-range ordered states with a hidden Z2xZ2 symmetry breaking, and are classified into four different class of states according to the eigenvalues of the edge spins.We also find that the degeneracy of the entanglement spectrum is reduced to (S +1)/2, implicating the coexistence of the ferromagnetic and topological order in the transformed VBS states with higher odd-integer spins.
其他文献
The precise and convenient control of quantum states is a major goal inatom and light, a nd is expected to lead to new physics and applications.Based on a seque
光时域反射测量(Optical time-domain reflectometry,OTDR) [1]是诊断光纤通信网络故障的主要技术.传统方法发射单个脉冲光作为探测信号,通过测量其后向散射和反射信号功率和
在量子点太阳能电池中,太阳光激发量子点产生光激发电子,这部分电子快速转移给电子受体比如说TiO2,从而有效地产生光电流[1].当激发光的能量大于量子点的能带隙时,会产生热电
Synopsis We study transfer-ionization in fast collisions between a highly charged ion and a light atom.We show that a strong field of the ion has a very pro
Synopsis Electron capture cross sections in collisions of protons with the nitrogen molecule are studied using two semiclassical ab initio methods.In one of
Synopsis The negative hydrogen ion H-plays a major role in many processes relevant for physics, cosmology, astrophysics and chemistry.In this work we show t
Synopsis Cross sections for single electron capture by Cn and single and double electron capture by Cn+ have been measured in high velocity (v=2.25 and 2.6
We propose to realize controllable squeezing states of ferromagnetic magnons with a spinor Bose-Einstein condensate confined in an optical lattice.We use an ext
The quantum Heisenberg model has been studied enduringly.The double-time Greens function (GF) method, being applicable in the whole temperature range, has been
(A)[B]2O4型尖晶石铁氧体是典型的氧化物功能材料,其结构,铁磁性,铁电性等方面的特性和应用得到了人们的广泛关注.其中氧离子以面心立方密堆积方式排列,(A)位处于由4个最近邻