Calcium lon as quantum bit in a linear paul trap

Abstract EN

One of the most promising ions to be used as a quantum bit (quit) is 4"fa+.

In this paper the effect of the laser wavelength detuning on the quantum register state is studied.

Trapped ion quantum computer that was suggested by Cirac is adopted in this work.

Starting from laser wavelength 709nm to 749nm, the fidelity is calculated for different physical and geometrical parameters of the linear Paul trap.

The two energy levels 12 and S 2of are chosen to represent the two logical states°^and Instates of the quit.

The results show that the optimum value of the fidelity can be achieved by choosing suitable values of the physical and geometrical parameters.

These parameters include the laser incident angle with trap axis, axial trap frequency and Rabi frequency.