تقرير
Demonstration of Universal Parametric Entangling Gates on a Multi-Qubit Lattice
| العنوان: | Demonstration of Universal Parametric Entangling Gates on a Multi-Qubit Lattice |
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| المؤلفون: | Reagor, M., Osborn, C. B., Tezak, N., Staley, A., Prawiroatmodjo, G., Scheer, M., Alidoust, N., Sete, E. A., Didier, N., da Silva, M. P., Acala, E., Angeles, J., Bestwick, A., Block, M., Bloom, B., Bradley, A., Bui, C., Caldwell, S., Capelluto, L., Chilcott, R., Cordova, J., Crossman, G., Curtis, M., Deshpande, S., Bouayadi, T. El, Girshovich, D., Hong, S., Hudson, A., Karalekas, P., Kuang, K., Lenihan, M., Manenti, R., Manning, T., Marshall, J., Mohan, Y., O'Brien, W., Otterbach, J., Papageorge, A., Paquette, J. -P., Pelstring, M., Polloreno, A., Rawat, V., Ryan, C. A., Renzas, R., Rubin, N., Russell, D., Rust, M., Scarabelli, D., Selvanayagam, M., Sinclair, R., Smith, R., Suska, M., To, T. -W., Vahidpour, M., Vodrahalli, N., Whyland, T., Yadav, K., Zeng, W., Rigetti, C. T. |
| المصدر: | Science Advances 02 Feb 2018: Vol. 4, no. 2, eaao3603 |
| سنة النشر: | 2017 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We show that parametric coupling techniques can be used to generate selective entangling interactions for multi-qubit processors. By inducing coherent population exchange between adjacent qubits under frequency modulation, we implement a universal gateset for a linear array of four superconducting qubits. An average process fidelity of $\mathcal{F}=93\%$ is estimated for three two-qubit gates via quantum process tomography. We establish the suitability of these techniques for computation by preparing a four-qubit maximally entangled state and comparing the estimated state fidelity against the expected performance of the individual entangling gates. In addition, we prepare an eight-qubit register in all possible bitstring permutations and monitor the fidelity of a two-qubit gate across one pair of these qubits. Across all such permutations, an average fidelity of $\mathcal{F}=91.6\pm2.6\%$ is observed. These results thus offer a path to a scalable architecture with high selectivity and low crosstalk. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1126/sciadv.aao3603 |
| URL الوصول: | http://arxiv.org/abs/1706.06570 |
| رقم الأكسشن: | edsarx.1706.06570 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1126/sciadv.aao3603 |
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