As a promising candidate for quantum information processing, neutral atoms in optical lattices offer unique scalability and tunability. To convert these promises into reality, it is, as a first step, crucial to manipulate the quantum states of individual atoms with high fidelity and without affecting quantum information stored in the neighboring sites. I will talk about our experimental progress, where we demonstrate arbitrary single qubit gate in a 5*5*5 3D atom array with negligible crosstalk (1) and high fidelity (2). The addressing is based on targeted phase shifts and is highly insensitive to the addressing beam imperfections. This technique should be widely applicable to atom, ion and other atom-like system.

Reference:
1. Y. Wang, X-L. Zhang, T. A. Corcovilos, A. Kumar, D. S. Weiss. Phys. Rev. Lett. 115, 043003 (2015).
2. Y. Wang, A. Kumar, T-Y. Wu, D.S. Weiss. Science. 352, 1562-1565, (2016).