genFermiHubbard_charge_parity()

MPS::Lattice syten::MPS::Lat::SU2U1Z::genFermiHubbard_charge_parity	(	Index const	length = 1,
		std::vector< Index >	types = std::vector<Index>()
	)

Generates a chain of Fermi-Hubbard sites.

Symmetries are ${\mathbb{Z}_L$ for the parity of the band, $\mathrm{U}(1)$ for charge/particle conservation and $\mathrm{SU}(2)$ for total spin. Parity applies to each of the up to 3 bands separately.

Parameters

length	of the total system
types	the type of each site. i significies the band the site belongs to

Remarks

Prefactors $\sqrt{2}$ are inspired by Weichselbaum, Annals of Physics 327 (2012), 2972-3047, pg. 3038 Table C.1.

For a detailed discussion of the need for parity operators, see the documentation for the $U(1) \times U(1)$ symmetry Fermi-Hubbard model.

Implemented Single-Site Operators ch and c create

and annihilate a single particle, n measures the particle number on the site. s is the local spin operator.

Referenced by syten::Pyten::init_mp_latgen().

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