Universal optimal broadband photon cloning and entanglement creation in one-dimensional atoms

Daniel Valente (1) , Y. Li (2) , Jean-Philippe Poizat (1) , Jean-Michel Gérard (3) , L.C. Kweck (2) , Marcelo F. Santos (4) , Alexia Auffèves (1)

1 NEEL - NPSC - Nanophysique et Semiconducteurs
2 CQT - Centre for Quantum Technologies [Singapore]
3 INAC - Institut Nanosciences et Cryogénie
4 UFMG - Universidade Federal de Minas Gerais = Federal University of Minas Gerais [Belo Horizonte, Brazil]

We study an initially inverted three-level atom in the Λ configuration embedded in a waveguide, interacting with a propagating single-photon pulse. Depending on the temporal shape of the pulse, the system behaves either as an optimal universal cloning machine or as a highly efficient deterministic source of maximally entangled photon pairs. This quantum transistor operates over a wide range of frequencies and can be implemented with today's solid-state technologies.

Mots clés: Quantum optics; stimulated emission

Domaines: Optique [physics.optics]

Daniel Valente, Y. Li, Jean-Philippe Poizat, Jean-Michel Gérard, L.C. Kweck, et al.. Universal optimal broadband photon cloning and entanglement creation in one-dimensional atoms. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2012, 86, pp.022333. ⟨10.1103/PhysRevA.86.022333⟩. ⟨hal-00999331⟩