A. Schellenberger

activity

20202026

most citedAbsence of topological order in the

U (1)

checkerboard toric code

1 citations · 1 across the 4 of their papers we have counts for

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cond-mat.str-el2026

To infinity and back -- $1/ N$ graph expansions of light-matter systems

Andreas Schellenberger, Kai P. Schmidt

We present a method for performing a full graph expansion for light-matter systems, utilizing the linked-cluster theorem. This method enables us to explore $1/ N$ corrections to the…

quant-ph2026

Quantitative approach for the Dicke-Ising chain with an effective self-consistent matter Hamiltonian

J. Leibig, M. Hörmann, A. Langheld +2

In the thermodynamic limit, the Dicke-Ising chain maps exactly onto an effective self-consistent matter Hamiltonian with the photon field acting solely as a self-consistent effecti…

To infinity and back -- 1/N graph expansions of light-matter systems

Quantitative approach for the Dicke-Ising chain with an effective self-consistent matter Hamiltonian

To infinity and back -- $1/ N$ graph expansions of light-matter systems