Operatorial formulation of the ghost rotationally-invariant slave-Boson theory
arXiv:2109.10320 · doi:10.1103/PhysRevB.105.045111
Abstract
We propose an operatorially-exact formalism for describing the equilibrium and quantum-dynamical properties of many-electron systems interacting locally on a lattice, called "ghost rotationally-invariant slave-Boson theory" (g-RISB). We demonstrate that our theoretical framework reduces to the recently-developed ghost Gutzwiller approximation (g-GA) at the mean-field level. Furthermore, we introduce the time-dependent mean-field g-RISB action, generalizing the time-dependent GA theory. Since the g-RISB is based on exact reformulation of the many-body problem, it may pave the way to the development of practical implementations for adding systematically quantum-fluctuation corrections towards the exact solution, in arbitrary dimension.
10 pages, 0 figures
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- Derivation of the Ghost Gutzwiller Approximation from Quantum Embedding principles: the Ghost Density Matrix Embedding Theory
- Time-dependent ghost-Gutzwiller non-equilibrium dynamics
- Charge self-consistent density functional theory plus ghost rotationally-invariant slave-boson theory for correlated materials
- Revealing spinons by proximity effect
- Linear Foundation Model for Quantum Embedding: Data-Driven Compression of the Ghost Gutzwiller Variational Space