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Simplified motional heating rate measurements of trapped ions



Ryan Epstein, Signe Seidelin, Dietrich G. Leibfried, Janus Wesenberg, John J. Bollinger, Jason Amini, Brad R. Blakestad, Joseph W. Britton, Jonathan Home, Wayne M. Itano, John D. Jost, Emanuel H. Knill, C. Langer, R. Ozeri, Nobuyasu Shiga, David J. Wineland


We measure motional heating rates of trapped atomic ions, a factor that influences multi-ion quantum logic gate fidelities. Two simplified techniques are developed for this purpose: one relies on Raman sideband detection implemented with a single laser source, while the second is even simpler and based on time-resolved fluorescence detection during Doppler recooling. We apply these methods to a microfrabricated surface-electrode trap, made of gold on fused quartz, which traps ions 40~$\mu$m above its surface. Heating rates obtained from the two techniques are found to be in reasonable agreement. In addition, the trap gives rise to a heating rate of $300\pm30$~quanta/s for a motional frequency of 5.25~MHz, substantially below the trend observed in other traps.
Physical Review A (Atomic, Molecular and Optical Physics)


atom, cool, Doppler, heating, ion, rate, surface, trap


Epstein, R. , Seidelin, S. , Leibfried, D. , Wesenberg, J. , Bollinger, J. , Amini, J. , Blakestad, B. , Britton, J. , Home, J. , Itano, W. , Jost, J. , Knill, E. , Langer, C. , Ozeri, R. , Shiga, N. and Wineland, D. (2007), Simplified motional heating rate measurements of trapped ions, Physical Review A (Atomic, Molecular and Optical Physics), [online], (Accessed June 21, 2024)


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Created September 19, 2007, Updated January 27, 2020