Fast quantum control of cavities using an improved protocol without coherent errors

• URL: http://arxiv.org/abs/2310.10498v1
• Date: Mon, 16 Oct 2023 15:19:40 GMT
• Title: Fast quantum control of cavities using an improved protocol without coherent errors
• Authors: Jonas Landgraf, Christa Fl\"uhmann, Thomas F\"osel, Florian Marquardt, Robert J. Schoelkopf
• Abstract summary: SNAP gates form a powerful class of quantum gates. For short pulses, coherent errors limit the performance. We show that such errors can be completely suppressed, provided that the pulse times exceed a specific limit.
• Score: 7.042755388054692
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The selective number-dependent arbitrary phase (SNAP) gates form a powerful class of quantum gates, imparting arbitrarily chosen phases to the Fock modes of a cavity. However, for short pulses, coherent errors limit the performance. Here we demonstrate in theory and experiment that such errors can be completely suppressed, provided that the pulse times exceed a specific limit. The resulting shorter gate times also reduce incoherent errors. Our approach needs only a small number of frequency components, the resulting pulses can be interpreted easily, and it is compatible with fault-tolerant schemes.

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