High-fidelity Rydberg controlled-Z gates with optimal pulses
- URL: http://arxiv.org/abs/2303.16395v3
- Date: Fri, 24 Nov 2023 16:18:11 GMT
- Title: High-fidelity Rydberg controlled-Z gates with optimal pulses
- Authors: T. H. Chang, T. N. Wang, H. H. Jen, and Y.-C. Chen
- Abstract summary: We numerically investigate the time-optimal pulses to generate a high-fidelity Rydberg $C_Z$ gate in a three-level ladder-type atomic system.
Our results promise a high-fidelity and fast gate operation under amenable and controllable experimental parameters.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: High-fidelity control-$Z$ ($C_Z$) gates are essential and mandatory to build
a large-scale quantum computer. In neutral atoms, the strong dipole-dipole
interactions between their Rydberg states make them one of the pioneering
platforms to implement $C_Z$ gates. Here we numerically investigate the
time-optimal pulses to generate a high-fidelity Rydberg $C_{Z}$ gate in a
three-level ladder-type atomic system. By tuning the temporal shapes of
Gaussian or segmented pulses, the populations on the intermediate excited
states are shown to be suppressed within the symmetric gate operation protocol,
which leads to a $C_{Z}$ gate with a high Bell fidelity up to $99.92\%$. These
optimized pulses are robust to thermal fluctuations and the excitation field
variations. Our results promise a high-fidelity and fast gate operation under
amenable and controllable experimental parameters, which goes beyond the
adiabatic operation regime under a finite Blockade strength.
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