Wednesday, September 19, 2012

1209.3874 (E. Orignac et al.)

Response functions in multicomponent Luttinger liquids    [PDF]

E. Orignac, R. Citro
We derive an analytic expression for the zero temperature Fourier transform of the density-density correlation function of a multicomponent Luttinger liquid with different velocities. By employing Schwinger identity and a generalized Feynman identity exact integral expressions are derived, and approximate analytical forms are given for frequencies close to each component singularity. We find power-like singularities and compute the corresponding exponents. Numerical results are shown for the case of three components.
View original: http://arxiv.org/abs/1209.3874

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