tqec.templates.qubit.Qubit4WayJunctionTemplate

class Qubit4WayJunctionTemplate(default_increments: Displacement | None = None)

An error-corrected qubit that is making a 4-way junction with other logical qubits.

The below text represents this template for an input k == 4

1  5  6  5  6  5  6  5  6  2
7 10 11 10 11 10 11 10 11 12
8 11 10 11 10 11 10 11  9 13
7  9 11 10 11 10 11  9 11 12
8 11  9 11 10 11  9 11  9 13
7  9 11  9 11 10 11  9 11 12
8 11  9 11 10 11 10 11  9 13
7  9 11 10 11 10 11 10 11 12
8 11 10 11 10 11 10 11 10 13
3 14 15 14 15 14 15 14 15  4

Warning

For k == 1, this template does not include any of the plaquette indexed 9 and so its instantiation has a “hole” in the plaquette indices.

__init__(default_increments: Displacement | None = None) → None

Base class for all the templates.

This class is the base of all templates and provide the necessary interface that all templates should implement to be usable by the library.

Parameters:

default_increments – default increments between two plaquettes. Defaults to Displacement(2, 2) when None

Methods

__init__([default_increments])	Base class for all the templates.
get_increments()	Get the default increments of the template.
get_midline_plaquettes(k[, orientation])	Returns the default observable qubits for the template.
get_spatially_distinct_subtemplates(k[, ...])	Returns a representation of all the distinct sub-templates of the provided manhattan radius.
instantiate(k[, plaquette_indices])	Generate the numpy array representing the template.
instantiation_origin(k)	Coordinates of the top-left entry origin.
shape(k)	Returns the current template shape.

Attributes

expected_plaquettes_number	Returns the number of plaquettes expected from the instantiate method.
scalable_shape	Returns a scalable version of the template shape.