The σt-J model is found to keep its spin pseudogap and spin-sector BKT transition almost doping-independent, which a slave-fermion mean-field theory with a PSG-selected ansatz explains as spin-charge separation.
PEPSKit.jl: A Julia package for projected entangled-pair state simulations
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We present PEPSKit$.$jl, a Julia package for simulating two-dimensional quantum many-body systems with infinite projected entangled-pair states (iPEPS). PEPSKit$.$jl builds on the TensorKit$.$jl package for tensor computations and provides high-level algorithms for iPEPS simulations that support both Abelian and non-Abelian symmetries, as well as fermionic systems. This work gives an overview of the main package features, which include support for ground-state, time-evolution, and finite-temperature simulations in systems with different physical symmetries and lattice geometries. These capabilities are illustrated through various examples and technical benchmarks.
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Robust spin pseudogap and spin-charge separation in the $\sigma t$-$J$ model
The σt-J model is found to keep its spin pseudogap and spin-sector BKT transition almost doping-independent, which a slave-fermion mean-field theory with a PSG-selected ansatz explains as spin-charge separation.