Quantum phase gate and controlled entanglement with polar molecules

Abstract

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.

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• Infrared-dressed entanglement of cold open-shell polar molecules for universal matchgate quantum computing
• Influence of a Feshbach resonance on the photoassociation of LiCs
• Toward scalable information processing with ultracold polar molecules in an electric field: a numerical investigation
• Entanglement Switch for Dipole Arrays
• Structure and melting behavior of classical bilayer crystals of dipoles
• Optimal trapping wavelengths of Cs${}_2$ molecules in an optical lattice
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• Bell-type inequalities for cold heteronuclear molecules
• Realization of Heisenberg models of spin systems with polar molecules in pendular states
• Ultracold atom-dimer long-range interactions beyond the $1/R^n$ expansion
• Feshbach-resonant Raman photoassociation in a Bose-Einstein condensate
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• Entangling non planar molecules via inversion doublet transition with negligible spontaneous emission
• Molecular orientation entanglement and temporal Bell-type inequalities
• Measuring molecular electric dipoles using trapped atomic ions and ultrafast laser pulses
• Many-Body Rate Limit on Photoassociation of a Bose-Einstein Condensate
• Bell states and entanglement of two-dimensional polar molecules in electric fields
• Trapping polar molecules by surface acoustic waves
• Entanglement creation in cold molecular gases using strong laser pulses