Numerical hardware-efficient variational quantum simulation of a soliton solution

Implementing variational quantum algorithms with noisy intermediate-scale machines of up to a hundred qubits is nowadays considered as one the most promising routes towards achieving practical advantage. In multiqubit circuits, running advanced hampered by noise inherent gates which distances us from idea universal computing. Based on one-dimensional spin chain competing symmetric and asymmetric pairwise exchange interactions, herein we discuss capabilities special attention paid hardware-efficient eigensolver. A delicate interplay between magnetic interactions allows stabilize chiral state that destroys homogeneity ordering, thus making this solution highly entangled. Quantifying entanglement in terms concurrence, argue that, while being capable correctly reproducing uniform configuration, ansatz meets difficulties providing detailed description noncollinear structure. The latter naturally limits application range computing solve simulation tasks.