Implementing the Quantum von Neumann Architecture with Superconducting Circuits

作者：Mariantoni Matteo; Wang H; Yamamoto T; Neeley M; Bialczak Radoslaw C; Chen Y; Lenander M; Lucero Erik; O'; Connell A D; Sank D; Weides M; Wenner J; Yin Y; Zhao J; Korotkov A N; Cleland A N; Martinis John M

来源：Science, 2011, 333(6052): 61-65.

DOI：10.1126/science.1208517

The von Neumann architecture for a classical computer comprises a central processing unit and a memory holding instructions and data. We demonstrate a quantum central processing unit that exchanges data with a quantum random-access memory integrated on a chip, with instructions stored on a classical computer. We test our quantum machine by executing codes that involve seven quantum elements: Two superconducting qubits coupled through a quantum bus, two quantum memories, and two zeroing registers. Two vital algorithms for quantum computing are demonstrated, the quantum Fourier transform, with 66% process fidelity, and the three-qubit Toffoli-class OR phase gate, with 98% phase fidelity. Our results, in combination especially with longer qubit coherence, illustrate a potentially viable approach to factoring numbers and implementing simple quantum error correction codes.

• 出版日期2011-10-7