Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 53: Quantum Optics and Photonics III
Q 53.4: Talk
Thursday, March 14, 2019, 14:45–15:00, S Gr. HS Maschb.
Effective dynamics of strongly coupled spin-boson systems with disorder and dissipation — •Eliana Fiorelli1,2, Matteo Marcuzzi1,2, Pietro Rotondo1,2, Federico Carollo1,2, and Igor Lesanovsky1,2 — 1School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom — 2Centre for the Mathematics and Theoretical Physics of Quantum Non-equilibrium Systems, University of Nottingham
We are exploring the dynamics of an ensemble of spins that interact strongly with dissipative bosonic modes. Such scenario can be achieved experimentally in trapped ion systems, but it is also of relevance for the description of superconducting circuits and atom-cavity systems. By integrating out the bosonic modes we obtain an effective equation of motion for the spin dynamics. For disordered spin-boson interactions this reduces to a set of classical rate equations that describe a non-thermal, i.e. non-equilibrium, evolution. For uniform coupling strengths the system may feature decoherence-free subspaces which allow to preserve quantum coherence and pairwise entanglement of spins over long times even in the presence of strong coupling to the bosons.