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Dissipative preparation of W states in trapped ion systems



Daniel Cole, Jenny Wu, Stephen Erickson, Panyu Hou, Andrew C. Wilson, Dietrich Leibfried, Florentin Reiter


We present protocols for dissipative entanglement of three trapped-ion qubits, and we discuss in detail a scheme that uses sympathetic cooling as the dissipation mechanism. This scheme relies on tailored destructive interference to generate one of six target W states in a three-ion qubit space. Using a beryllium-magnesium ion crystal as an example system, we theoretically investigate the scheme's performance and the effects of likely error sources, including thermal secular motion of the ion crystal, spontaneous photon scattering, and calibration imperfections. We estimate that a fidelity of 98 % may be achieved in typical trapped ion experiments with 1 ms interaction time. Our schemes belong to a second generation of dissipative schemes that avoid timescale hierarchies for faster preparation of entangled states.
New Journal of Physics


Trapped ions, atomic physics, quantum computing, quantum information processing, dissipative entanglement generation


Cole, D. , Wu, J. , Erickson, S. , Hou, P. , Wilson, A. , Leibfried, D. and Reiter, F. (2021), Dissipative preparation of W states in trapped ion systems, New Journal of Physics, [online],, (Accessed March 2, 2024)
Created July 2, 2021, Updated January 13, 2024