玻色子的反德鲁德金属
Anti-Drude Metal of Bosons
摘要：
在没有阻挫的情况下，处于基态的相互作用玻色子要么存在于超流相，要么存在于绝缘相。超流性对应于物质场的无摩擦流动，在光学传导性中，通过在零频率处的明显的$δ$ -函数峰来揭示，其振幅被称为德鲁德重量。相反，这种特有的低频特征在绝缘相中不存在，由零静态光学电导率定义。在这里，我们表明，玻色子粒子在无序的一维，$d=1$，系统也可以存在于一个导电的，非超流体，相时，他们的跳跃是偶极型，通常被视为短程$d=1$。这个阶段的特点是有限的静态光学电导率，其次是一个广泛的反德鲁德峰在有限的频率。非对角相关也是非常规的：它们的特点是任意大的无序值的可积代数衰减。这些结果不符合任何已知的量子相位的描述，并强烈建议存在一个新的玻色子物质的基态的导电状态。
英文摘要：
In the absence of frustration, interacting bosons in the ground state exist either in the superfluid or insulating phases. Superfluidity corresponds to frictionless flow of the matter field, and in optical conductivity is revealed through a distinct $δ$-functional peak at zero frequency with the amplitude known as the Drude weight. This characteristic low-frequency feature is instead absent in insulating phases, defined by zero static optical conductivity. Here we demonstrate that bosonic particles in disordered one dimensional, $d=1$, systems can also exist in a conducting, non-superfluid, phase when their hopping is of the dipolar type, often viewed as short-ranged in $d=1$. This phase is characterized by finite static optical conductivity, followed by a broad anti-Drude peak at finite frequencies. Off-diagonal correlations are also unconventional: they feature an integrable algebraic decay for arbitrarily large values of disorder. These results do not fit the description of any known quantum phase and strongly suggest the existence of a novel conducting state of bosonic matter in the ground state.
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。
