



@article {2143,
	title = {Interacting Qubit-Photon Bound States with Superconducting Circuits},
	journal = {Phys. Rev.  },
	volume = {X 9},
	year = {2019},
	month = {2018/01/30},
	abstract = {<p><span style="font-family: \&quot;Lucida Grande\&quot;, helvetica, arial, verdana, sans-serif; font-size: 14.4px;">Qubits strongly coupled to a photonic crystal give rise to many exotic physical scenarios, beginning with single and multi-excitation qubit-photon dressed bound states comprising induced spatially localized photonic modes, centered around the qubits, and the qubits themselves. The localization of these states changes with qubit detuning from the band-edge, offering an avenue of in situ control of bound state interaction. Here, we present experimental results from a device with two qubits coupled to a superconducting microwave photonic crystal and realize tunable on-site and inter-bound state interactions. We observe a fourth-order two photon virtual process between bound states indicating strong coupling between the photonic crystal and qubits. Due to their localization-dependent interaction, these states offer the ability to create one-dimensional chains of bound states with tunable and potentially long-range interactions that preserve the qubits\&$\#$39; spatial organization, a key criterion for realization of certain quantum many-body models. The widely tunable, strong and robust interactions demonstrated with this system are promising benchmarks towards realizing larger, more complex systems of bound states.</span></p>},
	doi = {https://doi.org/10.1103/PhysRevX.9.011021},
	url = {http://arxiv.org/abs/1801.10167},
	author = {Neereja M. Sundaresan and Rex Lundgren and Guanyu Zhu and Alexey V. Gorshkov and Andrew A. Houck}
}
