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Documentation/gutzwiller #140

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merged 2 commits into from Jan 13, 2022
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Documentation/gutzwiller #140

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c5874df
fix Gutzwiller docstring
joachimbrand Jan 13, 2022
4371e72
bump version number
joachimbrand Jan 13, 2022
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2 changes: 1 addition & 1 deletion Project.toml
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@@ -1,7 +1,7 @@
name = "Rimu"
uuid = "c53c40cc-bd84-11e9-2cf4-a9fde2b9386e"
authors = ["Joachim Brand <j.brand@massey.ac.nz>"]
version = "0.6.0"
version = "0.6.1-dev"

[deps]
Arrow = "69666777-d1a9-59fb-9406-91d4454c9d45"
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9 changes: 5 additions & 4 deletions src/Hamiltonians/GutzwillerSampling.jl
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GutzwillerSampling(::AbstractHamiltonian; g)

Wrapper over any [`AbstractHamiltonian`](@ref) that implements Gutzwiller sampling. In this
importance sampling scheme the Hamiltonian is modified as follows.

importance sampling scheme the Hamiltonian is modified as follows
```math
\\tilde{H}_{ij} = H_{ij} e^{-g(H_{jj} - H_{ii})}
\\tilde{H}_{ij} = H_{ij} e^{-g(H_{ii} - H_{jj})} .
```
This way off-diagonal spawns to higher-energy configurations are discouraged and
spawns to lower-energy configurations encouraged for positive `g`.

# Constructor

* `GutzwillerSampling(::AbstractHamiltonian, g)`
* `GutzwillerSampling(::AbstractHamiltonian; g)`

After construction, we can access the underlying hamiltonian with `G.hamiltonian` and the
After construction, we can access the underlying Hamiltonian with `G.hamiltonian` and the
`g` parameter with `G.g`.

# Example
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