Quantum Optics without photons --- from basic effects to new quantum information architectures.

Seminar

Traditionally, Quantum Optics is a field of research investigating light, matter and its interactions. In this talk, I will discuss several instances were methods and ideas from Quantum Optics find novel counterparts in solid-state nanostructures: (i) By identifying photons with electrons, and atoms with nuclear spins, we show that the build-up and reinforcement of correlations among nuclear spins can give rise to the new phenomenon of electronic superradiance in the current through a single quantum dot [1]. (ii) Building upon the same analogy, we show how to entangle dissipatively two nuclear spin ensembles in a double quantum dot, without requiring any unitary gates [2,3]. (iii) Lastly, by identifying the role of photons with phonons based on surface acoustic waves, in analogy to cavity QED we propose a universal, scalable, on-chip quantum information architecture in piezo-active materials [4]. [1] M.J.A. Schuetz, E.M. Kessler, J.I. Cirac, and G. Giedke, Phys. Rev. B 86, 085322 (2012). [2] M.J.A. Schuetz, E.M. Kessler, L.M.K. Vandersypen, J.I. Cirac, and G. Giedke, Phys. Rev. Lett. 111, 246802 (2013). [3] M.J.A. Schuetz, E.M. Kessler, L.M.K. Vandersypen, J.I. Cirac, and G. Giedke, Phys. Rev. B 89, 195310 (2014). [4] M.J.A. Schuetz, E.M. Kessler, G. Giedke, L.M.K. Vandersypen, M. D. Lukin, and J.I. Cirac, in preparation.

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