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Scaling up and effective cooling of ions in surface ion trap are centralchallenges in quantum computing and quantum simulation with trapped ions. Inthis theoretical study, we propose a versatile surface ion trap. In themanipulation zone of our trap, a symmetric seven-wire geometry enables innateprinciple-axes rotation of two parallel linear ion chains, which facilitatesthe cooling of ions along all principle trap axes. To alleviate contaminatingthe manipulation zone during ion loading, a symmetric five-wire geometry isdesigned as the loading zone. And a "fork junction" connects the loading andmanipulation zones, which also enables the shuttling and reordering of ions. Amulti-objective optimization procedure suitable for arbitrary junction designsis described in detail, and we present the corresponding optimal results forthe key components of our trap. The proposed versatile trap can be used in theconstruction of large-scale ion quantum processors. The trap also can be usedas the multi-ion-mixer or the efficient ion beam splitter, which has thepotential applications in quantum simulation and quantum computing, theresearch of 2D dimensional ion crystals and the guides of quantum microscope,like an electron beam splitter used for quantum matter-wave optics experiments.Interesting topics involving the spin-spin interactions between two ion chainscan also be simulated in our trap.

Versatile surface ion trap for effective cooling and large-scale trapping of ions