Observables

Observable <: Operator

Abstract type representing an observable to be measured. All Observables have eigvals defined.

See also: H, I, X, Y, Z, TensorProduct, HermitianObservable.

Braket.Observables.X <: Observable
Braket.Observables.X() -> Braket.Observables.X

Struct representing a Braket.Observables.X observable in a measurement.

Braket.Observables.Y <: Observable
Braket.Observables.Y() -> Braket.Observables.Y

Struct representing a Braket.Observables.Y observable in a measurement.

Braket.Observables.Z <: Observable
Braket.Observables.Z() -> Braket.Observables.Z

Struct representing a Braket.Observables.Z observable in a measurement.

Braket.Observables.H <: Observable
Braket.Observables.H() -> Braket.Observables.H

Struct representing a Braket.Observables.H observable in a measurement.

Braket.Observables.I <: Observable
Braket.Observables.I() -> Braket.Observables.I

Struct representing a Braket.Observables.I observable in a measurement.

TensorProduct <: Observable
TensorProduct(factors::Vector{<:Observable}) -> TensorProduct
TensorProduct(factors::Vector{String}) -> TensorProduct

Struct representing a tensor product of smaller observables.

Examples

julia> Braket.Observables.TensorProduct(["x", "h"])
Braket.Observables.TensorProduct(Braket.Observables.Observable[Braket.Observables.X(), Braket.Observables.H()])

julia> ho = Braket.Observables.HermitianObservable([0 1; 1 0]);

julia> Braket.Observables.TensorProduct([ho, Braket.Observables.Z()])
Braket.Observables.TensorProduct(Braket.Observables.Observable[Braket.Observables.HermitianObservable(Complex{Int64}[0 + 0im 1 + 0im; 1 + 0im 0 + 0im]), Braket.Observables.Z()])

HermitianObservable <: Observable
HermitianObservable(matrix::Matrix) -> HermitianObservable

Struct representing an observable of an arbitrary complex Hermitian matrix.

Examples

julia> ho = Braket.Observables.HermitianObservable([0 1; 1 0])
Braket.Observables.HermitianObservable(Complex{Int64}[0 + 0im 1 + 0im; 1 + 0im 0 + 0im])