fh_comm.hamiltonian_ops.HamiltonianOp

class fh_comm.hamiltonian_ops.HamiltonianOp

Bases: ABC

Parent class for fermionic Hamiltonian operators or commutators between them.

Methods

as_field_operator	Represent the operator in terms of fermionic field operators.
is_zero	Indicate whether the operator acts as zero operator.
norm_bound	Upper bound on the spectral norm of the operator.
normalize	Return a normalized copy of the operator together with its scalar prefactor.
proportional	Whether current operator is equal to 'other' up to a scalar factor.
support	Support of the operator: lattice sites which it acts on (including spin).
translate	Translate by shift and return the translated operator.

Attributes

fermi_weight	Maximum number of fermionic creation and annihilation operators multiplied together.
max_nmodes_exact_norm

abstract __add__(other)

Logical sum.

abstract __neg__()

Logical negation.

abstract __str__() → str

Represent the operator as a string.

abstract __sub__(other)

Logical difference.

abstract as_field_operator() → FieldOp

Represent the operator in terms of fermionic field operators.

abstract property fermi_weight: int

Maximum number of fermionic creation and annihilation operators multiplied together.

For example, the product of three number operators has weight 6.

abstract is_zero() → bool

Indicate whether the operator acts as zero operator.

abstract norm_bound() → float

Upper bound on the spectral norm of the operator.

abstract normalize() → tuple

Return a normalized copy of the operator together with its scalar prefactor.

abstract proportional(other) → bool

Whether current operator is equal to ‘other’ up to a scalar factor.

abstract support() → list[tuple]

Support of the operator: lattice sites which it acts on (including spin).

abstract translate(shift: Sequence[int])

Translate by shift and return the translated operator.