New regimes of quantum optics in giant artificial atoms and hybrid systems

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In FY2017, I was a co-author of 9 published scientific articles, some of which where published in highly regarded journals like Physical Review X, Nature Communications, and Physical Review Letters (PRL). Another 3 articles were submitted (1 of them has since been published in PRL) and several more articles are in the works, including a large review on ultrastrong coupling between light and matter. I have given 7 talks and 2 poster presentation at international conferences, workshops, and seminars. See attached list for details.My articles include several on the topic of ultrastrong light-matter coupling. Together with the group of professor Salvatore Savasta, we have shown how this regime allows analogs of nonlinear optics, many-body interactions among atoms, and observation of the dynamical Casimir effect at lower mechanical frequencies than previously thought, and introduces new subtleties for photon detection and virtual excitations.I completed the most comprehensive review ever of quantum optics with superconducting quantum circuits; this has become highly cited. I also studied the physics of giant atoms, i.e., atoms coupled to photons at multiple points separated by a large distance (several wavelengths). I provided theory support for two experiments: the first ever demonstration of coupling between a superconducting qubit and a resonator for surface acoustic waves and a demonstration of amplification without population inversion in a driven superconducting qubit.