arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1801.00705cond-mat.str-el
收藏

强非均匀Luttinger液体的非手征玻色化

Non-chiral bosonization of strongly inhomogeneous Luttinger liquids

Joy Prakash Das, Chandramouli Chowdhury, Girish S. Setlur

摘要:

非手征玻色化(Non-chiral bosonization,NCBT)是对一维空间中的标准费米玻色对应进行的一种非平凡的修改,以便于研究强非均匀Luttinger液体(LL),其中自由费米子的性质加上不均匀性的来源被精确地再现。介绍了NCBT的形式,讨论了极限情况检查、费米子对易规则、点分裂约束等问题。从NCBT得到的格林函数展开的费米子-费米子相互作用强度(前向散射短程)的权力,并与使用标准的费米子微扰理论得到的相应条款进行比较。最后,将由NCBT得到的格林函数代入格林函数的运动方程Schwinger-Dyson方程中,作为方法的非微扰验证。本文还简要讨论了其他一些可以用来获得一维关联函数的分析方法,如泛函玻色化和数值方法如DMRG。

英文摘要:

Non-chiral bosonization (NCBT) is a non-trivial modification of the standard Fermi-Bose correspondence in one spatial dimensions made in order to facilitate the study of strongly inhomogeneous Luttinger liquids (LL) where the properties of free fermions plus the source of inhomogeneities are reproduced exactly. The formalism of NCBT is introduced and limiting case checks, fermion commutation rules, point splitting constraints, etc. are discussed. The Green functions obtained from NCBT are expanded in powers of the fermion-fermion interaction strength (forward scattering short-range only) and compared with the corresponding terms obtained using standard fermionic perturbation theory. Lastly, the Green functions obtained from NCBT are inserted into the Schwinger-Dyson equation which is the equation of motion of the Green functions and serves as a non-perturbative confirmation of the method. Some other analytical approaches like functional bosonization and numerical techniques like DMRG, which can be used to obtain the correlation functions in 1D, are briefly discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑