Stability and single-particle properties of bosonized Fermi liquids.
Stability and single-particle properties of bosonized Fermi liquids.
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DOI：
10.1103/physrevb.50.1351
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发表时间：
1993-10
期刊：
影响因子：
--
通讯作者：
Houghton;Kwon;Marston
中科院分区：
文献类型：
--
作者：
Houghton;Kwon;Marston
我们通过玻色化研究了大于一的空间维度中费米液体的稳定性和单粒子性质。对于平滑的非奇异费米-液体相互作用，我们在 BCS 耦合中获得了 Shankar 的二阶重正化群流，并重现了众所周知的准粒子寿命结果。我们通过显式计算证明，当费米-液体相互作用规则时，不会发生自旋电荷分离。我们还探索了量子化玻色子激发和零声模式之间的关系，并提出了自旋和电荷集体模式方程的简明推导。最后我们讨论奇异费米-液体相互作用的一些方面。
We study the stability and single-particle properties of Fermi liquids in spatial dimensions greater than one via bosonization. For smooth nonsingular Fermi-liquid interactions we obtain Shankar's renormalization-group flows to second order in the BCS coupling and reproduce well-known results for quasiparticle lifetimes. We demonstrate by explicit calculation that spin-charge separation does not occur when the Fermi-liquid interactions are regular. We also explore the relationship between quantized bosonic excitations and zero-sound modes and present a concise derivation of both the spin and the charge collective-mode equations. Finally we discuss some aspects of singular Fermi-liquid interactions.