Entangled photons from the polariton vacuum in a switchable optical cavity
Abstract
We study theoretically the entanglement of two-photon states in the ground state of the intersubband cavity system, the so-called polariton vacuum. The system consists of a sequence of doped quantum wells located inside a microcavity and the photons can interact with intersubband excitations inside the quantum wells. Using an explicit solution for the ground state of the system, operated in the ultrastrong coupling regime, a post-selection is introduced, where only certain two-photon states are considered and analyzed for mode entanglement. We find that a fast quench of the coupling creates entangled photons and that the degree of entanglement depends on the absolute values of the in-plane wave vectors of the photons. Maximally entangled states can be generated by choosing the appropriate modes in the post-selection.
Keywords
Cite
@article{arxiv.1112.3211,
title = {Entangled photons from the polariton vacuum in a switchable optical cavity},
author = {Adrian Auer and Guido Burkard},
journal= {arXiv preprint arXiv:1112.3211},
year = {2016}
}
Comments
9+ pages, 7 figures