论文标题
弱幂律液体中的Landau准颗粒
Landau Quasiparticles in Weak Power-Law Liquids
论文作者
论文摘要
Landau-fermi液体理论的失败通常被认为是在相互作用的fermions的新兴田间理论中的普遍，规模不变行为的明显标志。然而，存在边界情况，较弱的尺度不变性与颗粒孔不对称结合可以与Landau Quasiparticle范式共存。在这封信中，我明确地表明，对于智障绿色功能的较弱的幂律缩放，可以存在Landau-Fermi液体。传统费米液体的这种异国情调的变体虽然表现出有限的准粒子重量和大型准粒子寿命，但仍显示出与Luttinger的定理不兼容的任何非平凡缩放。该结果提供了在高温度库酸酯超导体的高场，不足的伪群中的费米液样基态的证据。
The failure of Landau-Fermi liquid theory is often considered a telltale sign of universal, scale-invariant behavior in the emergent field theory of interacting fermions. Nevertheless, there exist borderline cases where weak scale invariance coupled with particle-hole asymmetry can coexist with the Landau quasiparticle paradigm. In this letter, I show explicitly that a Landau-Fermi liquid can exist for weak power-law scaling of the retarded Green's function. Such an exotic variant of the traditional Fermi liquid, although exhibiting a finite quasiparticle weight and large quasiparticle lifetime, is shown to always be incompatible with Luttinger's theorem for any non-trivial scaling. This result yields evidence for a Fermi liquid-like ground state in the high-field, underdoped pseudogap phase of the high-temperature cuprate superconductors.
