Spectral Function and Quasiparticle Damping of Interacting Bosons in Two Dimensions
نویسندگان
چکیده
منابع مشابه
Spectral function and quasiparticle damping of interacting Bosons in two dimensions.
We employ the functional renormalization group to study dynamical properties of the two-dimensional Bose gas. Our approach is free of infrared divergences, which plague the usual diagrammatic approaches, and is consistent with the exact Nepomnyashchy identity, which states that the anomalous self-energy vanishes at zero frequency and momentum. We recover the correct infrared behavior of the pro...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2009
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.102.120601