A tunable Josephson platform to explore many-body quantum optics in circuit-QED

Understand

Coupling an isolated emitter to a single mode of the electromagnetic field is now routinely achieved and well understood.

• Current efforts aim to explore the coherent dynamics of emitters coupled to several electromagnetic modes (EM).
• freedom.
• Recently, ultrastrong coupling to a transmission line has been achieved where the emitter resonance broadens to a significant fraction of its frequency.