ConjState

tensor4all_core::index_like

Enum ConjState 

Source 
pub enum ConjState {
    Undirected,
    Ket,
    Bra,
}
Expand description

Conjugate state (direction) of an index.

This enum represents whether an index has a direction (bra/ket) or is directionless. The direction is used to determine contractability between indices.

§QSpace Compatibility

In QSpace (extern/qspace-v4-pub), index direction is encoded via trailing * in itags:

  • Ket = ingoing index (QSpace: itag without trailing *)
  • Bra = outgoing index (QSpace: itag with trailing *)

§ITensors.jl Compatibility

ITensors.jl uses directionless indices by default (convenient for general tensor operations). The Undirected variant provides this behavior.

Variants§

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Undirected

Directionless index (ITensors.jl-like default).

Undirected indices can contract with other undirected indices if they have the same ID and dimension.

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Ket

Ket (ingoing) index.

In QSpace terminology, this corresponds to an index without a trailing * in its itag. Ket indices can only contract with Bra indices (and vice versa).

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Bra

Bra (outgoing) index.

In QSpace terminology, this corresponds to an index with a trailing * in its itag. Bra indices can only contract with Ket indices (and vice versa).

Trait Implementations§

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impl Clone for ConjState

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fn clone(&self) -> ConjState

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ConjState

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Hash for ConjState

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for ConjState

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fn eq(&self, other: &ConjState) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for ConjState

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impl Eq for ConjState

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impl StructuralPartialEq for ConjState

Auto Trait Implementations§

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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