Construction of robust Rydberg controlled-phase gates

One scheme is presented to construct the robust multi-qubit arbitrary-phase controlled-phase gate (CPG) with one control and multiple target qubits in Rydberg atoms using the Lewis-Riesenfeld (LR) invariant method. The scheme is not limited by adiabatic condition while preserves the robustness again...

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Bibliographic Details
Published in:arXiv.org 2019-04
Main Authors: Cai-Peng, Shen, Jin-Lei, Wu, Shi-Lei, Su, Liang, Erjun
Format: Article
Language:English
Subjects:
Numerical analysis
Quantum theory
Robustness (mathematics)
Spontaneous emission
Online Access:Get full text
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Summary:One scheme is presented to construct the robust multi-qubit arbitrary-phase controlled-phase gate (CPG) with one control and multiple target qubits in Rydberg atoms using the Lewis-Riesenfeld (LR) invariant method. The scheme is not limited by adiabatic condition while preserves the robustness against control parameter variations of adiabatic evolution. Comparing with the adiabatic case, our scheme does not require very strong Rydberg interaction strength. Taking the construction of two-qubit \(\pi\) CPG as an example, our scheme is more robust against control parameter variations than non-adiabatic scheme and faster than adiabatic scheme.
ISSN:2331-8422
DOI:10.48550/arxiv.1807.02808