title: Theory of an entanglement laser.
abstract: We consider the creation of polarization entangled light from parametric down-conversion driven by an intense pulsed pump field inside a cavity. The multiphoton states produced are close approximations to singlet states of two very large spins. A criterion is derived to quantify the entanglement of such states. We study the dynamics of the system in the presence of losses and other imperfections, concluding that the creation of strongly entangled states with photon numbers up to a million seems achievable.
authors.affiliation: Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Christoph
authors.initials: C
authors.lastname: Simon
authors.forename: Dik
authors.initials: D
authors.lastname: Bouwmeester