Abstract
Stable quantum memories that capable of storing quantum information for long time scales are an essential building block for an array of potential applications. The long memory time are usually achieved via dynamical decoupling technique involving decoupling of the memory states from its local environment. However, because this process is strongly limited by the errors in the pulses, an noise-protected scheme remains challenging in the field of quantum memories. Here we propose a scheme to design a noise-resisted pi pulse, which features high fidelity exceeding 99.9% under realistic situations. Using this pi pulse we can generate different dynamical decoupling sequences that preserve high fidelity for long time scales. The versatility, robustness, and potential scalability of this method may allow for various applications in quantum memories technology.
Highlights
Stable quantum memories that capable of storing quantum information for long time scales are an essential building block for an array of potential applications
We provide the extensive simulations of the pulse parameters to achieve high fidelity beyond 99.9% in realistic situations
We show that the noise-protected π pulses are at the heart of the dynamical decoupling (DD) sequence, thereby provide the required high fidelity for long-time applications
Summary
Stable quantum memories that capable of storing quantum information for long time scales are an essential building block for an array of potential applications. We show that the noise-protected π pulses are at the heart of the DD sequence, thereby provide the required high fidelity for long-time applications. We design a composite pulse to achieve the high fidelity operation since it is noise-resisted.
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