Noise-resistant phase gates with amplitude modulation

• URL: http://arxiv.org/abs/2008.05670v1
• Date: Thu, 13 Aug 2020 03:38:19 GMT
• Title: Noise-resistant phase gates with amplitude modulation
• Authors: Yan Wang, Jin-Lei Wu, Jin-Xuan Han, Yong-Yuan Jiang, Yan Xia, and Jie Song
• Abstract summary: A two-qubit arbitrary phase gate is constructed by designing proper logical states. We show that the gate against cavity decay can be enhanced significantly with amplitude modulation.
• Score: 11.13464273942407
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose a simple scheme for implementing fast arbitrary phase gates and employ pulse modulation to improve the gate robustness against different sources of noise. Parametric driving of a cavity is introduced to induce Rabi interactions between the cavity and qutrits, and then a two-qubit arbitrary phase gate is constructed by designing proper logical states. On this basis, we implement amplitude-shaped gates to obtain enhanced resilience to control errors in gate time and frequency detuning. By virtue of specifically designed logical states, the scheme displays intrinsic resistance to the energy relaxations of qutrits. Furthermore, we show that the gate robustness against cavity decay can be enhanced significantly with amplitude modulation.

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