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Sympathetic cooling of 9Be+ and 24Mg+ for quantum logic



Murray D. Barrett, B. L. DeMarco, T Schaetz, Dietrich Leibfried, Joseph W. Britton, J Chiaverini, Wayne M. Itano, Branislav M. Jelenkovic, John D. Jost, Christopher Langer, Till P. Rosenband, David J. Wineland


We demonstrate the cooling of a two species ion crystal consisting of one 9Be+ and one 24Mg+ ion. Since the respective cooling transitions of these two species are separated by more than 30 nm, laser manipulation of one ion has negligible effect on the other even when the ions are not individually addressed. As such this is a useful system for reinitializing the motional state in an ion trap quantum computer without affecting the qubit information. Additionally, we have found that the mass difference between ions enables a method for detecting and subsequently eliminating the effects of radio frequency micromotion.
Physical Review A (Atomic, Molecular and Optical Physics)


Barrett, M. , DeMarco, B. , Schaetz, T. , Leibfried, D. , Britton, J. , Chiaverini, J. , Itano, W. , Jelenkovic, B. , Jost, J. , Langer, C. , Rosenband, T. and Wineland, D. (2003), Sympathetic cooling of <sup>9</sup>Be<sup>+</sup> and <sup>24</sup>Mg<sup>+</sup> for quantum logic, Physical Review A (Atomic, Molecular and Optical Physics), [online], (Accessed April 14, 2024)
Created December 31, 2002, Updated October 12, 2021