Q-deformed rainbows: a universal simulator of free entanglement spectra
Lucy Byles,
Germán Sierra,
Jiannis K Pachos
Abstract:The behaviour of correlations across a bipartition is an indispensable tool in diagnosing quantum phases of matter. Here we present a spin chain with position-dependent XX couplings and magnetic fields, that can reproduce arbitrary structures of free fermion correlations across a bipartition. In particular, by choosing appropriately the strength of the magnetic fields we can obtain any single particle energies of the entanglement spectrum with high fidelity. The resulting ground state can be elegantly formulat… Show more
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