Measurement Of Heating Rates In A Microscopic Surface-electrode Ion Trap

According to the laws of thermodynamics,the calculation process of classical computers is irreversible.In addition,the problem about energy consumption is hard to solve.So after the development of five generations,it is exceedingly difficult to further upgrade classical computers.But the calculation process of quantum computation is reversible,which can solve some intractable problems by classical computation.As a result,developing quantum computers has attracted much attention of physicists.Due to scalability,the microscopic surface-electrode ion trap is a promising device for building future quantum computers,which places the segmented electrodes on the surface of the insulated substrate,forming confinement zones,storage zones and operation zones.This thesis demonstrates our work in the microscopic surface-electrode ion trap,including installation of experimental devices,trapping and control of 40Ca+ ions and measurement of the heating rate of 40Ca+ ions.More details are as below:1.Installation of the microscopic surface-electrode ion trap and accomplishment of the related electronic circuits and laser paths are achieved.The fluorescence from the trapped ions is observed.2.Doppler cooling limit is reached,and 866nm laser and the voltages of the dc electrodes are controlled by LabVIEW.The heating rates of 40Ca+ ions are measured,and observations present clearly the variation of the heating in the trap with the number and position of the ions as well as the RF power applied.3.A model about heat transport of the ions is studied by pseudo potential and the period and frequency spectrum of the energy transport is analyzed in the ions chain.