English

Generation and optimization of entanglement between atoms chirally coupled to spin cavities

Quantum Physics 2025-01-07 v2 Atomic Physics

Abstract

We explore the generation and optimization of entanglement between atoms chirally coupled to finite 1D spin chains, functioning as {\it spin cavities}. By diagonalizing the spin cavity Hamiltonian, we identify a parity effect that influences entanglement, with small even-sized cavities chirally coupled to atoms expediting entanglement generation by approximately 50%50\% faster than non-chiral coupling. Applying a classical driving field to the atoms reveals oscillations in concurrence, with resonant dips at specific driving strengths due to the resonances between the driven atom and the spin cavity. Extending our study to systems with energetic disorder, we find that high concurrence can be achieved regardless of disorder strength when the inverse participation ratio of the resulting eigenstates is favorable. Finally, we demonstrate that controlled disorder within the cavity significantly enhances and expedites entanglement generation, achieving higher concurrences up to four times faster than those attained in ordered systems.

Keywords

Cite

@article{arxiv.2403.00264,
  title  = {Generation and optimization of entanglement between atoms chirally coupled to spin cavities},
  author = {Jia-Bin You and Jian Feng Kong and Davit Aghamalyan and Wai-Keong Mok and Kian Hwee Lim and Jun Ye and Ching Eng Png and Francisco J. García-Vidal},
  journal= {arXiv preprint arXiv:2403.00264},
  year   = {2025}
}