Some results on the spin-boson model
In this talk I will discuss various applications and results on this well know model, which has found a new life in a variety of experimental systems that combine two-level systems with bosonic degrees of freedom, such as circuit-QED and trapped ions. The ideas I will discuss are related mainly to (i) the propagation of quantum information and correlations in the system and (ii) the existence of quantum phase transitions in regimes of â€œultra-strongâ€ coupling, where the counter-rotating terms of the spin-boson interaction play a relevant role. In passing I will review the theoretical and numerical tools we use to solve these problems.
Lieb-Robinson bounds for spin-boson lattice models andÂ trapped ions, J. Juenemann,Â A. Cadarso,Â D. Perez-Garcia,Â A. Bermudez,Â J.J. Garcia-Ripoll
Phys. Rev. Lett. 111, 230404 (2013)
Hybrid quantum magnetism in circuit-QED: from spin-photon waves to many-body spectroscopy, Andreas Kurcz,Â Alejandro Bermudez,Â Juan JosÃ© GarcÃa-Ripoll, Phys. Rev. Lett. 112, 180405 (2014)
Host: Chris Monroe
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