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Change METTS example to use product initial state and print product states #165

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Merged
merged 4 commits into from
Nov 10, 2025
Merged

Change METTS example to use product initial state and print product states #165

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b982f2f
Change METTS example to use product initial state and print product s…
emstoudenmire Nov 9, 2025
c568e49
Formatting
emstoudenmire Nov 9, 2025
c446842
Bump version number
emstoudenmire Nov 9, 2025
fb1f9c3
Remove unneeded using statement
emstoudenmire Nov 10, 2025
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2 changes: 1 addition & 1 deletion Project.toml
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
name = "ITensorMPS"
uuid = "0d1a4710-d33b-49a5-8f18-73bdf49b47e2"
authors = ["Matthew Fishman <mfishman@flatironinstitute.org>", "Miles Stoudenmire <mstoudenmire@flatironinstitute.org>"]
version = "0.3.23"
version = "0.3.24"

[deps]
Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
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6 changes: 4 additions & 2 deletions examples/finite_temperature/metts.jl
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Expand Up @@ -50,8 +50,9 @@ function main(; N = 10, cutoff = 1.0e-8, δτ = 0.1, beta = 2.0, NMETTS = 3000,
# Make y-rotation gates to use in METTS collapses
Ry_gates = ops([("Ry", n, (θ = π / 2,)) for n in 1:N], s)

# Arbitrary initial state
psi = random_mps(s)
# Arbitrary initial Z-product state
init_state = rand(["Z+", "Z-"], N)
psi = MPS(s, init_state)

# Make H for measuring the energy
terms = OpSum()
Expand Down Expand Up @@ -108,6 +109,7 @@ function main(; N = 10, cutoff = 1.0e-8, δτ = 0.1, beta = 2.0, NMETTS = 3000,
samp = sample!(psi)
new_state = [samp[j] == 1 ? "Z+" : "Z-" for j in 1:N]
end
@printf(" Next Product State = %s\n", new_state)
psi = MPS(s, new_state)
end

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