Related papers: Fast quantum gates based on Landau-Zener-St\"uckelberg-Majorana transitions

Fast quantum gates based on Landau-Zener-St\"uckelberg-Majorana transitions

URL: http://arxiv.org/abs/2309.00601v1
Date: Fri, 1 Sep 2023 17:43:57 GMT
Title: Fast quantum gates based on Landau-Zener-St\"uckelberg-Majorana transitions
Authors: Joan J. Caceres, Daniel Dominguez and Maria Jose Sanchez
Abstract summary: We derive analytical equations to determine the specific set of driving parameters for the implementation of single qubit and two qubit gates. Our results focus on the study of the single qubit $X_fracpi2$, $Y_fracpi2$ and identity gates.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Fast quantum gates are of paramount importance for enabling efficient and error-resilient quantum computations. In the present work we analyze Landau-Zener-St\"uckelberg-Majorana (LSZM) strong driving protocols, tailored to implement fast gates with particular emphasis on small gap qubits. We derive analytical equations to determine the specific set of driving parameters for the implementation of single qubit and two qubit gates employing single period sinusoidal pulses. Our approach circumvents the need to scan experimentally a wide range of parameters and instead it allows to focus in fine-tuning the device near the analytically predicted values. We analyze the dependence of relaxation and decoherence on the amplitude and frequency of the pulses, obtaining the optimal regime of driving parameters to mitigate the effects of the environment. Our results focus on the study of the single qubit $X_{\frac{\pi}{2}}$, $Y_{\frac{\pi}{2}}$ and identity gates. Also, we propose the $\sqrt{\rm{bSWAP}}$ as the simplest two-qubit gate attainable through a robust LZSM driving protocol.

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