Quantum optics and simulation with topological photons

DIPC Seminars

Alejandro Gonzalez-Tudela, Instituto de Fisica Fundamental (IFF), CSIC Madrid
Donostia International Physics Center
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Quantum optics and simulation with topological photons Recent experimental advances in nanophotonics [1], circuit QED [2] and atomic physics [3] allow one to engineer systems where atoms (or other quantum emitters) couple to photonic environments with non-trivial energy dispersions. In parallel, a quick progress is being made to design photons with topological properties in several experimental platforms including dielectric photonic crystals, cavities, or circuit QED, among others [4]. In this talk, I will discuss mostly two recent works [5-6] where we explore the emergent quantum dynamics and interactions appearing when quantum emitters are coupled to topological photonic lattices such as a topological 1D waveguide [5] and a 3D photonic Weyl environment [6]. We will pay particular attention to the possibility of obtaining robust coherent quantum emitter interactions which can be harnessed for quantum simulation of many-body spin Hamiltonians [5-6] or chemistry problems [7]. [1] Nature 508, 241–244 (2014), Nature Communications 5, 3808 (2014), Rev. Mod. Phys. 87, 347 (2015) [2] Nature Physics 13 (1), 48-52 (2017), Nature Communications, 9, 3706 (2018) [3] Nature 559, 589–592 (2018) [4] Rev. Mod. Phys. 91, 015006 (2019) [5] Science Advances 5, eaaw0297 (2019) [6] arXiv:1903.07513 [7] Nature 574 , 215-218 (2019)