Real-time chiral dynamics from a digital quantum simulation
arXiv:2001.00698 · doi:10.1103/PhysRevResearch.2.023342
Abstract
The chiral magnetic effect in a strong magnetic field can be described using the chiral anomaly in the -dimensional massive Schwinger model with a time-dependent -term. We perform a digital quantum simulation of the model at finite -angle and vanishing gauge coupling using an IBM-Q digital quantum simulator, and observe the corresponding vector current induced in a system of relativistic fermions by a global {\it chiral quench} -- a sudden change in the chiral chemical potential or -angle. At finite fermion mass, there appears an additional contribution to this current that stems from the non-anomalous relaxation of chirality. Our results are relevant for the real-time dynamics of chiral magnetic effect in heavy ion collisions and in chiral materials, as well as for modeling high-energy processes at hadron colliders.
arXiv comment13 pages, 6 figures; version accepted for Physical Review Research
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