Dressed energy of the XXZ chain in the complex plane
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DOI: 10.1007/s11005-021-01473-3
Abstract: We consider the dressed energy $$\varepsilon $$ ε of the XXZ chain in the massless antiferromagnetic parameter regime at $$0< \Delta < 1$$ 0 < Δ < 1 and at finite magnetic field. This function… read more here.
Keywords: xxz chain; dressed energy; complex plane; energy ... See more keywords
Low-frequency behavior of off-diagonal matrix elements in the integrable XXZ chain and in a locally perturbed quantum-chaotic XXZ chain
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DOI: 10.1103/physrevb.102.075127
Abstract: We study the matrix elements of local operators in the eigenstates of the integrable XXZ chain and of the quantum-chaotic model obtained by locally perturbing the XXZ chain with a magnetic impurity. We show that,… read more here.
Keywords: quantum chaotic; xxz; matrix elements; xxz chain ... See more keywords