Grigorenko IA, Khveshchenko DV. Single-step implementation of universal quantum gates.
PHYSICAL REVIEW LETTERS 2005;
95:110501. [PMID:
16196990 DOI:
10.1103/physrevlett.95.110501]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2005] [Indexed: 05/04/2023]
Abstract
We construct optimized implementations of the controlled-NOT and other universal two-qubit gates that, unlike many of the previously proposed protocols, are carried out in a single step. The new protocols require tunable interqubit couplings but, in return, show a significant improvement in the quality of gate operations. We make specific predictions for coupled Josephson junction qubits and compare them with the results of recent experiments.
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