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The ground-state correlations are investigated for an isotropic transverse XYchain which is constrained to carry either a current of magnetization J_M or acurrent of energy J_E. We find that the effect of nonzero J_M on thelarge-distance decay of correlations is twofold: i) oscillations are introducedand ii) the amplitude of the power law decay increases with increasing current.The effect of energy current is more complex. Generically, correlations incurrent carrying states are found to decay faster than in the J_E=0 states,contrary to expectations that correlations are increased by the presence ofcurrents. However, increasing the current, one reaches a special line where thecorrelations become comparable to those of the J_E=0 states. On this line, thesymmetry of the ground state is enhanced and the transverse magnetizationvanishes. Further increase of the current destroys the extra symmetry but thetransverse magnetization remains at the high-symmetry, zero value.Comment: 7 pages, RevTex, 4 PostScript figure

physical review. e, statistical physics, plasmas, fluids, and related interdisciplinary topics

Isotropic transverse<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>XY</mml:mi></mml:math>chain with energy and magnetization currents

Isotropic transverseXYchain with energy and magnetization currents