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We study the persistent currents and interspecies entanglement generation ina Bose-Bose mixture formed by two atomic gases (hereafter labelled by theletters A and B) trapped in a one-dimensional ring lattice potential with anartificial gauge field after a sudden quench from zero to strong interactionsbetween the two gases. Assuming that the strength of these interactions is muchlarger than the single species energies and that the gas A is initially in theMott-insulator regime, we show that the current of the gas B is reduced withrespect to its value prior the interaction quench. Averaging fast oscillationsout, the relative decrease of this current is independent of the initialvisibility and Peierls phase of the gas B and behaves quadratically with thevisibility of the gas A. The second R\'enyi entropy of the reduced statemeasuring the amount of entanglement between the two gases is found to scalelinearly with the number of sites and to be proportional to the relativedecrease of the current.

Persistent currents in Bose-Bose mixtures after an interspecies interaction quench