| Quantum information science is a subject which uses the unique properties of qu-antum systems to give the calculation, coding, information processing and transmissi-on process a new interpretation, the development of new, more efficient information processing functions. It is the product of the combination of quantum mechanics and information science, including quantum computing and quantum communication. No-w people are working on a variety of physical systems to explore quantum computing. Because the ion trap system has a very long storage time and coherent manipulation t-ime and scalability, etc., it becomes one of the most promising large-scale quantum c-omputing system.This thesis describes our work in the linear ion trap system, including the optimi-zation and improvement of the linear ion trap control system, capturing and Compens-ating the ions, compensating environmental magnetic field, scanning Zeeman lines, Realizing sideband cooling and analyzing spectrum of Rabi and Ramsey lines, testing Heisenberg’s error-disturbance relation etc., More detail are as below:1.In order to improve the experiment precision and facilitate in the future work, We designed a higher precise and more powerful FPGA timing control circuit, at the same time we also write a set of PC control program based on Lab VIEW.2.Realization of Doppler cooling limit by compensating the micro motion of the ions; Using Hanel effect to compensate environmental magnetic field in the magnetic coil and using ultra-narrow line width 729nm laser, we obtained ten Zeeman spectral component of the 4S1/2(?)3D5/2 transition of 40Ca+ ion in the small magnetic field Condition.3.Realizing sideband cooling of 40Ca+ ion at high magnetic fields and large cap voltage after adjusting the parameters; Exploring the heating rate after sideband cooling and Scanning and analyzing the spectrum of Rabi and Ramsey lines.4. Verifying Heisenberg’s error-disturbance relationship through joint measurem-ent with a single ion. |
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