000165046 001__ 165046 000165046 005__ 20251204150239.0 000165046 0247_ $$2doi$$a10.1103/physrevresearch.2.043307 000165046 0248_ $$2sideral$$a146443 000165046 037__ $$aART-2020-146443 000165046 041__ $$aeng 000165046 100__ $$aStewart, Michael 000165046 245__ $$aDynamics of matter-wave quantum emitters in a structured vacuum 000165046 260__ $$c2020 000165046 5060_ $$aAccess copy available to the general public$$fUnrestricted 000165046 5203_ $$aThe characteristics of spontaneous emission can be strongly modified by the mode structure of the vacuum. In waveguide quantum-electrodynamics based on photonic crystals, this modification is exploited to engineer atom-photon interactions near a band edge, but the physics of coupling to an entire band has not yet been explored in experiments. Using ultracold atoms in an optical lattice, we study the decay dynamics of matter-wave quantum emitters coupled to a single band of an effective photonic crystal waveguide structure with tunable characteristics. Depending on the ratio between vacuum coupling and bandwidth, we observe a transition from irreversible decay to fully oscillatory dynamics linked to the interplay of matter-wave bound states near the band edges, whose spatial structure we characterize. Our results shed light on the emergence of coherence in an open quantum system in a controllable environment and are of relevance for the understanding of vacuum-induced decay phenomena in photonic systems. 000165046 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es 000165046 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000165046 700__ $$aKwon, Joonhyuk 000165046 700__ $$0(orcid)0000-0001-7049-0250$$aLanuza, Alfonso 000165046 700__ $$aSchneble, Dominik 000165046 773__ $$g2, 4 (2020), 043307 [7 pp.]$$pPhys. rev. res.$$tPhysical Review Research$$x2643-1564 000165046 8564_ $$s1215199$$uhttps://zaguan.unizar.es/record/165046/files/texto_completo.pdf$$yVersión publicada 000165046 8564_ $$s2938903$$uhttps://zaguan.unizar.es/record/165046/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000165046 909CO $$ooai:zaguan.unizar.es:165046$$particulos$$pdriver 000165046 951__ $$a2025-12-04-14:39:58 000165046 980__ $$aARTICLE