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

作者：Ichikawa, Tsubasa^*; Guengoerdue, Utkan; Bando, Masamitsu; Kondo, Yasushi; Nakahara, Mikio

来源：Physical Review A, 2013, 87(2): 022323.

DOI：10.1103/PhysRevA.87.022323

• QUANTUM
• PULSES
• NMR

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

• 出版日期2013-2-19