论文标题
用巡回偶极子挤压：浅晶格的箱子
Spin Squeezing with Itinerant Dipoles: A Case for Shallow Lattices
论文作者
论文摘要
通过晶格模型中通过偶极相互作用产生的纠缠旋转挤压状态为量子增强的感测提供了独特的机会，现在已达到当前实验的范围。在这种情况下，一个关键的问题是哪种参数制度在现实条件下提供了最佳前景。深层晶格中的光散射会引起明显的腐烂和强烈的鲜明的变化，而浅晶格则面临运动的腐烂作为基本障碍。在这里，我们使用精确的矩阵乘积状态模拟在一维链中分析了巡回费米偶极子中运动和自旋挤压之间的相互作用。我们证明，浅晶格可以实现超过5db的挤压，即使在存在较低的填充，损失和脱碳的情况下，也可以超过3DB的深层晶格。我们将这一发现与SU（2） - 对称的superexchange相互作用联系起来，这些相互作用使旋转保持对齐并保护集体相关性。我们表明，对于小排斥异地相互作用，实现了最佳状态，最大程度地挤压和最佳挤压时间之间的权衡。
Entangled spin squeezed states generated via dipolar interactions in lattice models provide unique opportunities for quantum enhanced sensing and are now within reach of current experiments. A critical question in this context is which parameter regimes offer the best prospects under realistic conditions. Light scattering in deep lattices can induce significant decoherence and strong Stark shifts, while shallow lattices face motional decoherence as a fundamental obstacle. Here we analyze the interplay between motion and spin squeezing in itinerant fermionic dipoles in one dimensional chains using exact matrix product state simulations. We demonstrate that shallow lattices can achieve more than 5dB of squeezing, outperforming deep lattices by up to more than 3dB, even in the presence of low filling, loss and decoherence. We relate this finding to SU(2)-symmetric superexchange interactions, which keep spins aligned and protect collective correlations. We show that the optimal regime is achieved for small repulsive off-site interactions, with a trade-off between maximal squeezing and optimal squeezing time.
