Polaronic correlations from optimized ancilla wave functions for the Fermi-Hubbard model

Abstract

We employ a family of ancilla qubit variational wave-functions [Zhang and Sachdev, Phys. Rev. Res. 2, 023172 (2020)] to describe the polaronic correlations in the pseudo-gap metal phase of a hole-doped 2D Fermi-Hubbard model. Comparison to ultra-cold atom quantum simulator data [Koepsel et al., Science 374, 82 (2021)] reveals both qualitative and quantitative agreement with the numerical analysis from half-filling up to 80\% hole-doping, capturing the crossover from the polaronic regime to the Fermi liquid observed around $40\%$ doping.

arXiv comment7 pages, 3 figures

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• Quantum oscillations in the hole-doped cuprates and the confinement of spinons
• Altermagnetic polarons: the fate of alter magnetic band splittings at strong coupling
• Fractionalized Fermi liquids and the cuprate phase diagram
• Learning topological states from randomized measurements using variational tensor network tomography
• Thermopower across Fermi-volume-changing quantum phase transitions without translational symmetry breaking