Open AccessEntangled W state of multi degree of freedom system based on orbital angular momentum
Author(s) -
Fan Rong-Hua,
Baoping Guo,
Jianjun Guo,
Chengxian Zhang,
Wenjie Zhang,
Guotong Du
Publication year - 2015
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.64.140301
Subject(s) - physics , quantum entanglement , angular momentum , quantum mechanics , photon , polarization (electrochemistry) , spontaneous parametric down conversion , w state , angular momentum coupling , photon entanglement , total angular momentum quantum number , quantum state , photon polarization , orbital angular momentum of light , quantum , chemistry
We propose a method of generating the three-photon W state. The method uses parametric down-conversion process and hybrid entanglement swapping from multiphoton spin-entangled states to multiphoton orbital angular momentum (OAM) entangled states, with the aid of a pair of polarization photons. They generate W state entangled in different degrees of freedom of polarization and OAM with a high-dimensional Hilbert space. By simply changing the methods of generating a polarization-OAM-linear momentum entangled W state. Our method produces two mutually symmetric W states with strong entanglement and high dimension, which is expected to realize the secure communication of extending quantum bits.