cirq.TiltedSquareLattice

A grid lattice rotated 45-degrees.

Inherits From: NamedTopology

cirq.TiltedSquareLattice(
    width: int, height: int
)

Used in the notebooks

Used in the tutorials

This topology is based on Google devices where plaquettes consist of four qubits in a square connected to a central qubit:

x   x
  x
x   x

The corner nodes are not connected to each other. width and height refer to the rectangle formed by rotating the lattice 45 degrees. width and height are measured in half-unit cells, or equivalently half the number of central nodes. An example diagram of this topology is shown below. It is a "tilted-square-lattice-6-4" with width 6 and height 4.

      x
      │
 x────X────x
 │    │    │

x────X────x────X────x │ │ │ │ x────X────x────X───x │ │ │ x────X────x │ x

Nodes are 2-tuples of integers which may be negative. Please see get_placements for mapping this topology to a GridQubit Device.

width Dataclass field
height Dataclass field

Methods

draw

View source

draw(
    ax=None, tilted=True, **kwargs
)

Draw this graph using Matplotlib.

Args
ax Optional matplotlib axis to use for drawing.
tilted If True, directly position as (row, column); otherwise, rotate 45 degrees to accommodate the diagonal nature of this topology.
**kwargs Additional arguments to pass to nx.draw_networkx.

nodes_as_gridqubits

View source

nodes_as_gridqubits() -> List['cirq.GridQubit']

Get the graph nodes as cirq.GridQubit

nodes_to_gridqubits

View source

nodes_to_gridqubits(
    offset=(0, 0)
) -> Dict[Tuple[int, int], 'cirq.GridQubit']

Return a mapping from graph nodes to cirq.GridQubit

Args
offset Offset row and column indices of the resultant GridQubits by this amount. The offset positions the top-left node in the draw(tilted=False) frame.

__eq__

__eq__(
    other
)

graph Instance of NotImplementedType
n_nodes Instance of NotImplementedType
name Instance of NotImplementedType