Benchmarking the simplest slave-particle theory with Hubbard dimer
Yang Wei-Wei1, Luo Hong-Gang1, 2, Zhong Yin1, †
The schematic illustration of Z2 slave-spin representation. The physical state of one site (left column) can be represented by pseudospin and pseudofermion. In the enlarged Hilbert space, half of states are physical (middle column) and the other half are unphysical (right column). It is twice as large as the original one.
