论文标题
Ultrastrong波导QED中的结合状态
Bound states in ultrastrong waveguide QED
论文作者
论文摘要
我们讨论了有限带宽波导QED中结合状态的特性，超出了旋转波近似或激发数，以保存光 - 耦合模型。因此，我们将\ emph {Standard}计算扩展到更广泛的轻度强度，尤其是在所谓的Ultrastrong耦合方面。我们使用Polaron技术来做到这一点。我们的主要结果如下。我们计算自发排放率，与费米黄金法则公式相比，该发射速率被重新归一化。我们概括了结合状态，它们的性质及其在量子体热化中的作用的存在标准。我们通过真空波动和结合状态讨论有效的自旋旋转相互作用。最后，我们在遥远的发射器中绘制完美的状态转移协议。
We discuss the properties of bound states in finite-bandwidth waveguide QED beyond the Rotating Wave Approximation or excitation number conserving light-matter coupling models. Therefore, we extend the \emph{standard} calculations to a broader range of light-matter strengths, in particular, in the so-called ultrastrong coupling regime. We do this using the Polaron technique. Our main results are as follows. We compute the spontaneous emission rate, which is renormalized as compared to the Fermi Golden Rule formula. We generalise the existence criteria for bound states, their properties and their role in the qubits thermalization. We discuss effective spin-spin interactions through both vacuum fluctuations and bound states. Finally, we sketch a perfect state-transfer protocol among distant emitters.
