ITAMP, Cambridge, MA, USA, June 29 - July 1, 2015; https://www.cfa.harvard.edu/itamp/LightMatterInteractionsinLowDimensions-schedule.htmlPeer Reviewe

García-Ripoll, Juan José

Leeds, 15 December 2015; seminars/calendar-item/article/theoretical-physics-seminar-juan-jose-garcia-ripoll-instituto-de-fisica-fundamental-1.htmlQuantum circuits represent a unique platform for studying new regimes of
light-matter interaction. An excellent impedance match between photonic
degrees of freedom and artificial atoms (superconducting qubits) allows
reaching very strong couplings [1], while preserving broadband
tunability. Inspired by these possibilities, and supported by numerical
tools based on Matrix Product States, we are studying the Ohmic
spin-boson model [2], focusing not only on the dissipative dynamics of
qubits, but also on their effects on the photonic field, few photon
scattering and strongly correlated phenomena [3]. I will report on such
results, including additional theoretical efforts [4] to model these
strongly interacting light-matter systems at low dimensions. Finally, I
will connect our results with ongoing experimental work of our
collaborators at the group of Prof. R. Gross (WMI, Garching)Peer Reviewe

Digital.CSIC

Superconducting circuit microwave photonics

Superconducting Circuit Microwave PhotonicsJuan Jose Garcia Ripoll Instituto de Física Fundamental Quantum circuits represent a unique platform for studying new regimes of light-matter interaction. An excellent impedance match between photonic degrees of freedom and artificial atoms (superconducting qubits) allows reaching very strong couplings [1], while preserving broadband tunability. Inspired by these possibilities, and supported by numerical tools based on Matrix Product States, we are studying the Ohmic spin-boson model [2], focusing not only on the dissipative dynamics of qubits, but also on their effects on the photonic field, few photon scattering and strongly correlated phenomena [3]. I will report on such results, including additional theoretical efforts [4] to model these strongly interacting light-matter systems at low dimensions.  Finally, I will connect our results with ongoing experimental work of our collaborators at the group of Prof. R. Gross (WMI, Garching)[1] Circuit quantum electrodynamics in the ultrastrong-coupling regime. T. Niemczyk et al, Nat. Phys. 6, 772-776 (2010)[2] Nonequilibrium and nonperturbative dynamics of ultrastrong coupling in open lines, B. Peropadre, D. Zueco, D. Porras, J. J. Garcia-Ripoll, Phys. Rev.  Lett. 111, 243602 (2013)[3] Hybrid quantum magnetism in circuit-QED: from spin-photon waves to many-body spectroscopy. A. Kurcz, A. Bermudez, J. J. García-Ripoll, Phys. Rev. Lett. 112, 180405 (2014)[4] Photon-mediated qubit interactions in 1D discrete and continous models, G. Diaz-Camacho, D. Porras, J. J. Garcia-Ripoll, accepted in PRA

Superconducting circuit microwave photonics

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