optimizer#

Quantum natural gradient descent#

`QNGD`	Abstract class of quantum natural gradient descent.
`TDVP`	Time-dependent variational principle TDVP, or stochastic reconfiguration (SR).
`TDVP_exact`	Exact TDVP evolution, performed by a full summation in the whole Hilbert space.
`MinSR`	MinSR optimization, specifically designed for `Sequential` networks.

`auto_pinv_eig`	Obtain the least-square minimum-norm solver for the linear equation \(Ax=b\) using pseudo-inverse.
`minsr_pinv_eig`	Obtain the pseudo-inverse solver for the inverse problem in MinSR \(Tx=b\), where \(T\) is a Hermitian matrix.