English

EPR steering in symmetrical Gaussian states

Quantum Physics 2022-10-06 v3

Abstract

We have explored quantum Einstein-Podolsky-Rosen steering in symmetric two-mode Gaussian states using Gaussian and non-Gaussian measurements. For Gaussian measurements, we show that steering between the output modes of a symmetric beamsplitter is possible regardless of purity when a threshold input-state quadrature variance compression is achieved. Using the non-Gaussian operators introduced in [1] we show that non-Gaussian measurements can outperform Gaussian measurements for symmetrical states. We also analyze the possibility of asymmetric measurements setups made possible by non-Gaussian measurements and provide examples where such asymmetry is optimal for revealing steering. [1] Ji, SW., Lee, J., Park, J. et al. Quantum steering of Gaussian states via non-Gaussian measurements. Sci Rep 6, 29729 (2016). https://doi.org/10.1038/srep29729

Keywords

Cite

@article{arxiv.2103.10418,
  title  = {EPR steering in symmetrical Gaussian states},
  author = {Eugenia Benech and Adriana Auyuanet and Arturo Lezama},
  journal= {arXiv preprint arXiv:2103.10418},
  year   = {2022}
}

Comments

9 pages, 6 figures. Addmited for publication on Physical Review A, as a regular article

R2 v1 2026-06-24T00:19:42.099Z