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Threshold singularities in the dynamic response of gapless integrable models
V. V. Cheianov, M. Pustilnik
We develop a method of an asymptotically exact treatment of threshold singularities in dynamic response functions of gapless integrable models. The method utilizes the integrabilit…
One-particle irreducible density matrix for the spin disordered infinite Hubbard chain
Vadim V. Cheianov, M. B. Zvonarev
In this Letter we present a calculation of the one-particle irreducible density matrix for the one-dimensional (1D) Hubbard model in the infinite limit. We consider the…
Zero temperature correlation functions for the impenetrable fermion gas
Vadim V Cheianov, M B Zvonarev
We calculate the long time and distance asymptotics of the one-particle correlation functions in the model of impenetrable spin 1/2 fermions in 1+1 dimensions. We consider the spin…
Non-Unitary Spin-Charge Separation in One-Dimensional Fermion Gas
Vadim V. Cheianov, M. B. Zvonarev
In this Letter we report exact results on the infrared asymptotics of one-particle dynamical correlation function of the gas of impenetrable spin 1/2 fermions at infinitesimal temp…