Heralded single-magnon quantum memory for photon polarization states

Haruka Tanji; Saikat Ghosh; Jonathan Simon; Benjamin Bloom; Vladan Vuletić

Heralded single-magnon quantum memory for photon polarization states

Quantum Physics 2008-08-28 v1

Authors: Haruka Tanji , Saikat Ghosh , Jonathan Simon , Benjamin Bloom , Vladan Vuletić

Abstract

We demonstrate a heralded quantum memory based on mapping of a photon polarization state onto a single collective-spin excitation (magnon) shared between two spatially overlapped atomic ensembles. The polarization fidelity is measured by quantum state tomography to be above 90(2)% for any input polarization, which far exceeds the classical limit of 2/3. The process also constitutes a quantum non-destructive probe that detects and regenerates a photon without touching its - potentially undetermined - polarization.

Keywords

quantum memory quantum optics polarization optics

Cite

@article{arxiv.0808.3603,
  title  = {Heralded single-magnon quantum memory for photon polarization states},
  author = {Haruka Tanji and Saikat Ghosh and Jonathan Simon and Benjamin Bloom and Vladan Vuletić},
  journal= {arXiv preprint arXiv:0808.3603},
  year   = {2008}
}

Related papers

View all related →