One-step construction of a multi-qubit controlled phase gate with ensembles of nitrogen-vacancy centers in hybrid circuit QED

被引：1
作者：
Xu, Jin [1 ]
Liu, Tong [2 ]
机构：
[1] Shangrao Normal Univ, Sch Phys & Elect Informat, Shangrao 334001, Peoples R China
[2] Shangrao Normal Univ, Quantum Informat Res Ctr, Shangrao 334001, Peoples R China
来源：
QUANTUM INFORMATION PROCESSING | 2022年 / 21卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Multi-qubit controlled phase gate; NV ensembles; Superconducting flux qutrit; Hybrid circuit QED; SUPERCONDUCTING CIRCUITS; QUANTUM INFORMATION; COHERENT CONTROL; FREDKIN GATE; IMPLEMENTATION; ENTANGLEMENT; SCHEME;
D O I：
10.1007/s11128-022-03552-3
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a one-step method to realize a multi-qubit controlled phase gate of multiple nitrogen-vacancy-center ensembles (NV ensembles). This multi-qubit phase gate is based on cross-Kerr nonlinearities, which are enabled by a superconducting flux qutrit dispersively coupled to multiple NV ensembles. Since the flux qutrit is not populated during the operation, the effect of qutrit decoherence is greatly suppressed. Moreover, the gate operation time is independent of the number of NV ensembles. Numerical simulations show that high-fidelity construction of a four-qubit controlled phase gate with four NV ensembles is feasible with present hybrid circuit QED technology.
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页数：14
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