共振偶極-偶極交互作用於束縛原子的暗態邊帶冷卻中之影響

Abstract

長程的偶極-偶極相互作用在各種量子光學系統中起著至關重要的作用，尤其在量子模擬和計算方面具有重要意義。本論文重點探究共振偶極-偶極相互作用在暗態邊帶冷卻中的影響。我們首先分析了自由空間原子之間的共振偶極-偶極相互作用。然後，我們將分辨邊帶冷卻技術擴展到暗態冷卻方案，並通過利用光子介導的偶極-偶極相互作用在束縛原子中實現增強冷卻效果。通過將原子放置在特定的粒子間距上，我們實現了目標原子超越單個原子所能達到的優越冷卻性能。我們進一步探索了具有激光失諧和不同偶極極化角度的多原子設置，並識別出多個奇特間距，預測隨著原子數量的增加，冷卻性能將有適度的提高。我們的研究揭示了利用光子介導的遠程偶極-偶極相互作用冷卻原子的原理，為克服可擴展量子計算和量子模擬中的冷卻限制提供機會。

Long-range dipole-dipole interactions, mediated by photons, play a crucial role in various quantum optics systems and are particularly relevant for quantum simulation and computation. This thesis focuses on exploring the impact of resonant dipole-dipole interactions in the context of dark-state sideband cooling. We begin by analyzing the resonant dipole-dipole interaction between free-space atoms. We then extend the resolved sideband cooling technique to the dark-state cooling scheme and demonstrate enhanced cooling in trapped atoms by leveraging photon-mediated dipole-dipole interactions. Through placing atoms at specific interparticle distances, we achieve superior cooling performance in the target atom beyond what is achievable by a single atom. We further explore multiatom setups with laser detuning and different light polarization angles and identify multiple magic spacings where moderate improvements in cooling performance are predicted with increasing numbers of atoms. Our research sheds light on the cooling of atoms utilizing light-induced long-range dipole-dipole interactions and provides opportunities for overcoming cooling limitations in scalable quantum computation and quantum simulations.