Spheroidal-structure-based multi-qubit Toffoli gate via asymmetric Rydberg interaction

• URL: http://arxiv.org/abs/2007.11938v1
• Date: Thu, 23 Jul 2020 11:30:26 GMT
• Title: Spheroidal-structure-based multi-qubit Toffoli gate via asymmetric Rydberg interaction
• Authors: Dongmin Yu, Weiping Zhang, Jin-ming Liu, Shilei Su and Jing Qian
• Abstract summary: We propose an exotic multi-qubit Toffoli gate protocol via asymmetric Rydberg blockade. The merit of a spheroidal structure lies in a well preservation of strong blocked energies between all control-target atom pairs. Our findings may shed light on scalable neutral-atom quantum computation in special high-dimensional arrays.
• Score: 6.151090395769923
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose an exotic multi-qubit Toffoli gate protocol via asymmetric Rydberg blockade, benefiting from the use of a spheroidal configuration to optimize the gate performance. The merit of a spheroidal structure lies in a well preservation of strong blocked energies between all control-target atom pairs within the sphere, which can persistently keep the blockade error at a low level. On the basis of optimization for three different types of $(2+1)$-$qubit$ gate units to minimize the antiblockade error, the gate fidelity of an optimal $(6+1)$-$qubit$ configuration can attain as high as $0.9841$ mainly contributed by the decay error. And the extension with much more control atoms is also discussed. Our findings may shed light on scalable neutral-atom quantum computation in special high-dimensional arrays.

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