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[ITensors] Define Sy for tJ site type #1642

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Merged
merged 5 commits into from
Apr 7, 2025
Merged

[ITensors] Define Sy for tJ site type #1642

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f43eca0
Update tj.jl
andrewkhardy Apr 4, 2025
0fe9c96
Update src/lib/SiteTypes/src/sitetypes/tj.jl
andrewkhardy Apr 7, 2025
5b6ca7b
Update test_phys_site_types.jl
andrewkhardy Apr 7, 2025
8d3db2e
Merge branch 'main' into patch-1
mtfishman Apr 7, 2025
5fceda7
Update src/lib/SiteTypes/src/sitetypes/tj.jl
mtfishman Apr 7, 2025
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8 changes: 7 additions & 1 deletion src/lib/SiteTypes/src/sitetypes/tj.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -183,7 +183,13 @@ function op!(Op::ITensor, ::OpName"Sx", ::SiteType"tJ", s::Index)
Op[s' => 2, s => 3] = 0.5
return Op[s' => 3, s => 2] = 0.5
end

function op!(Op::ITensor, ::OpName"Sy", ::SiteType"tJ", s::Index)
Op[s' => 2, s => 3] = -0.5im
return Op[s' => 3, s => 2] = 0.5im
end
function op!(Op::ITensor, ::OpName"Sʸ", st::SiteType"tJ", s::Index)
return op!(Op, OpName("Sy"), st, s)
end
function op!(Op::ITensor, ::OpName"Sˣ", st::SiteType"tJ", s::Index)
return op!(Op, OpName("Sx"), st, s)
end
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4 changes: 4 additions & 0 deletions test/base/test_phys_site_types.jl
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Expand Up @@ -742,6 +742,10 @@ using ITensors.SiteTypes: has_fermion_string, op, siteind, siteinds, state
@test Sx ≈ [0.0 0.0 0; 0 0 0.5; 0 0.5 0]
Sx = Array(op(s, "Sˣ"), s', s)
@test Sx ≈ [0.0 0.0 0; 0 0 0.5; 0 0.5 0]
Sy = Array(op(s, "Sy"), s', s)
@test Sy ≈ [0.0 0.0 0; 0 0 -0.5im; 0 0.5im 0]
Sy = Array(op(s, "Sʸ"), s', s)
@test Sy ≈ [0.0 0.0 0; 0 0 -0.5im; 0 0.5im 0]
Sp = Array(op(s, "Splus"), s', s)
@test Sp ≈ [0.0 0.0 0; 0 0 1.0; 0 0 0]
Sp = Array(op(s, "Sp"), s', s)
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