Threshold singularities in the dynamic response of gapless integrable models

Cheianov, Vadim and Pustilnik, Michael (2008) Threshold singularities in the dynamic response of gapless integrable models. Physical review letters, 100 (12). -. ISSN 0031-9007

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Abstract

We develop a method of an asymptotically exact treatment of threshold singularities in dynamic response functions of gapless integrable models. The method utilizes the integrability to recast the original problem in terms of the low-energy properties of a certain deformed Hamiltonian. The deformed Hamiltonian is local; hence, it can be analyzed using the conventional field theory methods. We apply the technique to spinless fermions on a lattice with nearest-neighbors repulsion, and evaluate the exponent characterizing the threshold singularity in the dynamic structure factor.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
55545
Deposited By:
Deposited On:
02 Jul 2012 15:15
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 07:57