Minimal and robust composite two-qubit gates with Ising-type interaction

被引：11
|
作者：
Ichikawa, Tsubasa [1 ]
Guengoerdue, Utkan [1 ]
Bando, Masamitsu [1 ]
Kondo, Yasushi [1 ,2 ]
Nakahara, Mikio [1 ,2 ]
机构：
[1] Kinki Univ, Res Ctr Quantum Comp, Interdisciplinary Grad Sch Sci & Engn, Higashiosaka, Osaka 5778502, Japan
[2] Kinki Univ, Dept Phys, Higashiosaka, Osaka 5778502, Japan
来源：
PHYSICAL REVIEW A | 2013年 / 87卷 / 02期
关键词：
26;
D O I：
10.1103/PhysRevA.87.022323
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We construct a minimal robust controlled-NOT gate with an Ising-type interaction by which elementary two-qubit gates are implemented. It is robust against inaccuracy of the coupling strength and the obtained quantum circuits are constructed with the minimal number (N = 3) of elementary two-qubit gates and several one-qubit gates. It is noteworthy that all the robust circuits can be mapped to one-qubit circuits robust against a pulse length error. We also prove that a minimal robust SWAP gate cannot be constructed with N = 3 but requires N = 6 elementary two-qubit gates. DOI: 10.1103/PhysRevA.87.022323
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页数：6
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