Reprogrammable and high-precision holographic optical addressing of trapped ions for scalable quantum control

High-precision, individually programmable manipulation of quantum particles is crucial for scaling up quantum information processing (QIP) systems such as laser-cooled trapped-ions. However, restricting undesirable crosstalk in optical manipulation of ion qubits is fundamentally challenging due to micron-level inter-ion separation. Further, inhomogeneous ion spacing and high susceptibility to aberrations at UV wavelengths suitable for most ion-species pose severe challenges. Here, we demonstrate high-precision individual addressing (lambda =369.5 nm) of Yb+ using a reprogrammable Fourier hologram. The precision is achieved through in-situ aberration characterization via the trapped ion, and compensating (to lambda /20) with the hologram. Using an iterative Fourier transformation algorithm (IFTA), we demonstrate an ultra-low (<10(-4)) intensity crosstalk error in creating arbitrary pair-wise addressing profiles, suitable for over fifty ions. This scheme relies on standard commercial hardware, can be readily extended to over a hundred ions, and adapted to other ion-species and quantum platforms.

Automated summary

The study demonstrates high-precision individual addressing of Yb+ ions using a reprogrammable Fourier hologram, achieving the restriction of undesirable crosstalk. The scheme, capable of handling arbitrary pair-wise addressing profiles for over fifty ions, can be easily extended to over a hundred ions and adapted to other ion species and quantum platforms.