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cond-mat.quant-gas2024
Operator Valued Flow Equation Approach to the Bosonic Lattice Polaron: Dispersion Renormalization Beyond the Fröhlich Paradigm
Jan-Philipp Christ, Pit Bermes, Fabian Grusdt
We consider the ground state properties of a lattice Bose polaron, a quasiparticle arising from the interaction between an impurity confined to an optical lattice and a surrounding…
cond-mat.str-el2024
Magnetic polarons beyond linear spin-wave theory: Mesons dressed by magnons
Pit Bermes, Annabelle Bohrdt, Fabian Grusdt
When a mobile hole is doped into an antiferromagnet, its movement will distort the surrounding magnetic order and yield a magnetic polaron. The resulting complex interplay of spin…