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arxiv 2202.13210 v3 pith:UU2337ZA submitted 2022-02-26 physics.optics cond-mat.quant-gas

Coupled quantum vortex kinematics and Berry curvature in real space

classification physics.optics cond-mat.quant-gas
keywords berryquantumcurvaturefieldsvortexmulti-componentrealskyrmions
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The Berry curvature provides a powerful tool to unify several branches of science through their geometrical aspect: topology, energy bands, spin and vector fields. While quantum defects -- phase vortices and skyrmions -- have been in the spotlight, as rotational entities in condensates, superfluids and optics, their dynamics in multi-component fields remain little explored. Here we use two-component microcavity polaritons to imprint a dynamical pseudospin texture in the form of a double full Bloch beam, a conformal continuous vortex beyond unitary skyrmions. The Berry curvature plays a key role to link various quantum spaces available to describe such textures. It explains for instance the ultrafast spiraling in real space of two singular vortex cores, providing in particular a simple expression -- also involving the complex Rabi frequency -- for their intricate velocity. Such Berry connections open new perspectives for understanding and controlling highly-structured quantum objects, including strongly asymmetric cases or even higher multi-component fields.

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