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Ion trap quantum gates with amplitude-modulated laser beams

Christian F Roos
2008 New Journal of Physics  
In ion traps, entangling gate operations can be realized by a bichromatic pair of laser beams that collectively interact with the ions. In this paper, a new method of modelling the laser-ion interaction is introduced that turns out to be superior to standard techniques for the description of gate operations on optical qubits. The treatment allows for a comparison of the performance of gates based on $\sigma_z\otimes\sigma_z$ and M{\o}lmer-S{\o}rensen interactions on optical transitions where
more » ... ransitions where the bichromatic laser field can be realized by an amplitude-modulated laser resonant with the qubit transition. Shaping the amplitude of the bichromatic laser pulse is shown to make the gates more robust against experimental imperfections.
doi:10.1088/1367-2630/10/1/013002 fatcat:jeckphyi6rednkgnmotyuxdxbm