optimizer

Quantum natural gradient descent

QNGD	Abstract class of quantum natural gradient descent.
SR	Stochastic reconfiguration (SR).
SPRING	SPRING optimizer.
MARCH	MARCH optimizer.
AdamSR	AdamSR optimizer.
ER	Exact reconfiguration, performed by a full summation in the whole Hilbert space.
TimeEvol	Time evolution optimizer, equivalent to real-time SR.

Solvers

auto_pinv_eig

Obtain the least-square minimum-norm solver for the linear equation \(Ax=b\) using pseudo-inverse.