Prefer a chat interface with context about you and your work?
Zero-frequency transport properties of one-dimensional spin-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mfrac><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:mfrac></mml:math>systems
We report a detailed analysis of the Drude weights for both thermal and spin transport in one-dimensional spin-$\frac{1}{2}$ systems by means of exact diagonalization and analytic approaches at finite temperatures. Transport properties are studied first for the integrable $\mathrm{XXZ}$ model and second for various nonintegrable systems such as the dimerized …