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  • Open Access

Analog quantum simulation of chiral magnetic dynamics using optical superlattices

Sabhyata Gupta* and Luis Santos†

  • *Contact author: sabhyata.gupta@itp.uni-hannover.de
  • †Contact author: santos@itp.uni-hannover.de
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Phys. Rev. A 114, 033321 – Published 17 September, 2026

DOI: https://doi.org/10.1103/hr8d-ttj8

Abstract

We propose an analog quantum simulation of chiral magnetic dynamics using ultracold atoms in an optical superlattice. The massive Schwinger model in the zero gauge coupling limit maps onto the Rice-Mele model, with the fermion mass and topological angle encoded in the superlattice parameters. We study the real-time dynamics of the vector current following two quench protocols that drive continuous chirality injection and chirality relaxation. Simulations with realistic superlattice parameters and experimental noise demonstrate clear mass dependence of the current dynamics in both protocols, robust against experimental imperfections. The vector current may be directly measurable via single-bond-resolved detection, establishing cold atom superlattices as a viable platform for probing nonequilibrium chiral phenomena.

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Phys. Rev. A 114, 033321– Published 17 September, 2026
  • Received 12 June 2026
  • Accepted 8 September 2026
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