论文标题
增强的自旋机械相互作用与悬浮的微型磁铁
Enhanced spin-mechanical interaction with levitated micromagnets
论文作者
论文摘要
自旋机械混合系统已被广泛用于量子信息处理。但是，自旋机械相互作用通常很弱，这是增强旋转机械相互作用到强耦合甚至超强耦合方案的关键挑战。在这里，我们提出了一种可以通过钻石自旋空位和悬浮的微型磁铁的旋转机械耦合强度显着增强自旋机械耦合强度的方案。驱动电流用于调节悬浮的微型磁铁的机械运动，该机械运动可诱导两次驱动器，并且可以指数增强自旋 - 音纸和声子计时的自旋旋转耦合强度。此外，使用此混合系统可以实现高保真型Schrodinger猫状态和具有高忠诚度和更快栅极速度的非常规的2 Quibent的几何相门。该协议提供了一个有前途的平台，用于使用NV旋转耦合的量子信息处理。
Spin-mechanical hybrid systems have been widely used in quantum information processing. However, the spin-mechanical interaction is generally weak, making it a critical challenge to enhance the spin-mechanical interaction into the strong coupling or even ultra-strong coupling regime. Here, we propose a protocol that can significantly enhance the spin-mechanical coupling strength with a diamond spin vacancy and a levitated micromagnet. A driving electrical current is used to modulate the mechanical motion of the levitated micromagnet, which induces a two-phonon drive and can exponentially enhance the spin-phonon and phonon-medicated spin-spin coupling strengths. Furthermore, a high fidelity Schrodinger cat state and an unconventional 2-qubit geometric phase gate with high fidelity and faster gate speed can be achieved using this hybrid system. This protocol provides a promising platform for quantum information processing with NV spins coupled to levitated micromagnets.
