Abstract
Atom-photon bound states arise from the coupling of quantum emitters to the band edge of dispersion-engineered waveguides. Thanks to their tunable-range interactions, they are promising building blocks for quantum simulators. Here, we study the dynamics of an atom-photon bound state emerging from coupling a frequency-tunable quantum emitter - a transmon-type superconducting circuit - to the band edge of a microwave metamaterial. Employing precise temporal control over the frequency detuning of the emitter from the band edge, we examine the transition from adiabatic to nonadiabatic behavior in the formation of the bound state and its melting into the propagating modes of the metamaterial. Moreover, we experimentally observe multimode emission from the bound state, triggered by a fast change of the emitter's frequency. Our Letter offers insight into the dynamic preparation of APBS and provides a method to characterize their photonic content, with implications in quantum optics and quantum simulation.
| Original language | English |
|---|---|
| Article number | 133601 |
| Journal | Physical Review Letters |
| Volume | 134 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 31 Mar 2025 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work received support from the Swedish Research Council and the Knut and Alice Wallenberg Foundation through the Wallenberg Center for Quantum Technology (WACQT). S. G. acknowledges financial support from the European Research Council via Grant No. 101041744 ESQuAT.