



01649nas a2200193   4500008004100000245007500041210006900116260001300185490000600198520110000204100001401304700001301318700001701331700001301348700002101361700001801382700001801400856003701418       2022                        eng d00aA scheme to create and verify scalable entanglement in optical lattice0 ascheme to create and verify scalable entanglement in optical lat  c9/4/20220 v83 a<p>To achieve scalable quantum information processing, great efforts have been devoted to the creation of large-scale entangled states in various physical systems. Ultracold atom in optical lattice is considered as one of the promising platforms due to its feasible initialization and parallel manipulation. In this work, we propose an efficient scheme to generate and characterize global entanglement in the optical lattice. With only two-layer quantum circuits, the generation utilizes two-qubit entangling gates based on the superexchange interaction in double wells. The parallelism of these operations enables the generation to be fast and scalable. To verify the entanglement of this non-stabilizer state, we mainly design three complementary detection protocols which are less resource-consuming compared to the full tomography. In particular, one just needs two homogenous local measurement settings to identify the entanglement property. Our entanglement generation and verification protocols provide the foundation for the further quantum information processing in optical lattice.</p>1 aZhou, You1 aXiao, Bo1 aDa Li, Meng-1 aZhao, Qi1 aYuan, Zhen-Sheng1 aMa, Xiongfeng1 aPan, Jian-Wei  uhttps://arxiv.org/abs/2209.01531