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Integrability and coherence of hopping between 1D correlated electrons systems

Frederic Mila·Didier Poilblanc
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Abstract

We present numerical evidence that the hopping of electrons between chains described by the $t-J$ model is coherent in the integrable cases ($J=0$ and $J=2$) and essentially incoherent otherwise. This effect is {\it not} related to the value of the exponent $α$, (which is restricted to the interval [0,1/8] when $0\le J\le 2$), and we propose that enhanced coherence is characteristic of integrable systems.

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Frederic Mila, Didier Poilblanc. 1995-08-10. Integrability and coherence of hopping between 1D correlated electrons systems. https://doi.org/10.1103/physrevlett.76.287

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