Longhi Stefano
Opt Lett. 2025 May 1;50(9):3026-3029. doi: 10.1364/OL.561740.
In waveguide quantum electrodynamics (QED) systems, atomic radiation emission is shaped by photonic environment and collective atom interactions, offering promising applications in quantum technologies. In particular, atom-photon bound states, inhibiting a complete spontaneous decay of the atom, can be realized through waveguide dispersion engineering or by utilizing giant atoms. While steady-state bound states are well understood, transient or virtual bound states remain less explored. Here, we investigate transient atom-photon bound states, arising from initial atom-photon entanglement, and propose methods to slow down spontaneous atomic decay.
在波导量子电动力学（QED）系统中，原子辐射发射受光子环境和原子集体相互作用的影响，这为量子技术带来了有前景的应用。特别是，通过波导色散工程或利用巨型原子，可以实现抑制原子完全自发衰变的原子 - 光子束缚态。虽然稳态束缚态已被充分理解，但瞬态或虚拟束缚态仍较少被研究。在这里，我们研究由初始原子 - 光子纠缠产生的瞬态原子 - 光子束缚态，并提出减缓原子自发衰变的方法。
