Geometric Binder cumulants derived from a generalized Bargmann invariant detect gap closure in quantum systems for identifying phase transitions.
The wavefunction is only needed at a single point in parameter space, we c an simply denote it |Ψ ⟩ γ = Im log⟨Ψ |ˆU |Ψ ⟩
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From generating functions to the geometric Binder cumulant
Geometric Binder cumulants derived from a generalized Bargmann invariant detect gap closure in quantum systems for identifying phase transitions.