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arXiv 1012.3783cond-mat.str-el
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Gutzwiller型波函数不能捕获规范涨落:激子玻色液体中的个例研究

Failure of Gutzwiller-type wave function to capture gauge fluctuations: Case study in the Exciton Bose Liquid context

Tiamhock Tay, Olexei I. Motrunich

摘要:

从粒子方法在奇异量子相的研究中得到了广泛的应用。一个完整的描述超出平均场也包含动力学规范场,而一个简化的程序考虑Gutzwiller投影的试验状态。我们应用这一点的背景下,实现所谓的激子玻色液体(EBL)相位和Gutzwiller波函数对一个准确的EBL波函数的环交换的玻色子模型。我们求解了部分子规范理论,并指出空间规范场的动力学涨落是获得定性精确的EBL描述所必需的。相反,仅仅是Gutzwiller投影导致了一个在长波长性质上有细微差异的状态,因此表明Gutzwiller波函数通常可能无法捕获长波长物理。

英文摘要:

Slave particle approaches are widely used in studies of exotic quantum phases. A complete description beyond mean field also contains dynamical gauge fields, while a simplified procedure considers Gutzwiller-projected trial states. We apply this in the context of bosonic models with ring exchanges realizing so-called Exciton Bose Liquid (EBL) phase and compare a Gutzwiller wave function against an accurate EBL wave function. We solve the parton-gauge theory and show that dynamical fluctuations of the spatial gauge fields are necessary for obtaining qualitatively accurate EBL description. On the contrary, just the Gutzwiller projection leads to a state with subtle differences in the long-wavelength properties, thus suggesting that Gutzwiller wave functions may generally fail to capture long-wavelength physics.

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。

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