Quantum phase gate and controlled entanglement with polar molecules

Eric Charron (1) , Pérola Milman (2, 3) , Arne Keller (2) , Osman Atabek (2)

1 Approches théoriques en dynamique quantique
2 PPM - Laboratoire de Photophysique Moléculaire
3 CERMICS - Centre d'Enseignement et de Recherche en Mathématiques, Informatique et Calcul Scientifique

We propose an alternative scenario for the generation of entanglement between rotational quantum states of two polar molecules. This entanglement arises from dipole-dipole interaction, and is controlled by a sequence of laser pulses simultaneously exciting both molecules. We study the efficiency of the process, and discuss possible experimental implementations with cold molecules trapped in optical lattices or in solid matrices. Finally, various entanglement detection procedures are presented, and their suitability for these two physical situations is analyzed.

Domaines: Physique Quantique [quant-ph]

Eric Charron, Pérola Milman, Arne Keller, Osman Atabek. Quantum phase gate and controlled entanglement with polar molecules. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2007, 75 (3), pp.033414. ⟨10.1103/PhysRevA.75.033414⟩. ⟨hal-00089723v2⟩