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Asymmetric Blockade and Multiqubit Gates via Dipole-Dipole Interactions
Physical Review Letters ( IF 8.6 ) Pub Date : 2021-09-17 , DOI: 10.1103/physrevlett.127.120501
Jeremy T Young 1, 2, 3 , Przemyslaw Bienias 3, 4 , Ron Belyansky 3, 4 , Adam M Kaufman 1 , Alexey V Gorshkov 3, 4
Affiliation  

Because of their strong and tunable interactions, Rydberg atoms can be used to realize fast two-qubit entangling gates. We propose a generalization of a generic two-qubit Rydberg-blockade gate to multiqubit Rydberg-blockade gates that involve both many control qubits and many target qubits simultaneously. This is achieved by using strong microwave fields to dress nearby Rydberg states, leading to asymmetric blockade in which control-target interactions are much stronger than control-control and target-target interactions. The implementation of these multiqubit gates can drastically simplify both quantum algorithms and state preparation. To illustrate this, we show that a 25-atom Greenberger-Horne-Zeilinger state can be created using only three gates with an error of 5.8%.

中文翻译:

通过偶极-偶极相互作用的非对称封锁和多量子位门

由于它们的强且可调的相互作用,里德堡原子可用于实现快速的双量子位纠缠门。我们建议将通用的双量子位里德堡封锁门推广到同时涉及许多控制量子位和许多目标量子位的多量子位里德堡封锁门。这是通过使用强微波场来修饰附近的里德堡状态来实现的,导致不对称封锁,其中控制 - 目标相互作用比控制 - 控制和目标 - 目标相互作用强得多。这些多量子位门的实现可以大大简化量子算法和状态准备。为了说明这一点,我们展示了仅使用三个门就可以创建 25 个原子的 Greenberger-Horne-Zeilinger 状态,误差为 5.8%。
更新日期:2021-09-17
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