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Some results on the spin-boson model

August 20, 2014 - 10:00am
Juan-Jose Garcia-Ripoll
Instituto de Física Fundamental, Madrid

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 “ultra-strong” 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 and trapped ions, J. Juenemann, A. Cadarso, D. Perez-Garcia, A. Bermudez, 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, Alejandro Bermudez, Juan José García-Ripoll, Phys. Rev. Lett. 112, 180405 (2014)

Host: Chris Monroe

2115 Computer and Space Sciences
College Park, MD 20742