qubiter.quantum_CSD_compiler.Node module

class qubiter.quantum_CSD_compiler.Node.Node(nd_id, pa_nd, side, init_unitary_mat=None)[source]

Bases: object

This class carries the “cargo” of each node of a tree. Included in that cargo are

  • self’s parent and 2 children nodes,
  • its side, level and id,
  • its left, central and right matrix lists.

This class also performs the very important task of calling within its constructor the function CS_Decomp.get_csd() which fills the node’s left, central and right matrix lists.

Variables:
  • central_mats (list(np.ndarray)) – Central matrix list returned by call to CS_Decomp.get_csd( ). A central_mats is a list of dmats. A dmat= D matrix is numpy array containing floats (radian angles).
  • left_mats (list(np.ndarray)) – Left matrix list returned by call to CS_Decomp.get_csd()
  • left_nd (Node) – Node to left of self.
  • level (int) – 1<= level <= num_bits+1. level = 1 for root node, level = num_of_bits+1 for node whose central_mat is list of 1 dim arrays
  • nd_id (int) – node id, int assigned by Tree, nd_id=0 for first (root) node created by Tree, nd_id=1 for second node created, etc.
  • pa_nd (Node) – parent node
  • right_mats (list(np.ndarray)) – Right matrix list returned by call to CS_Decomp.get_csd()
  • right_nd (Node) – Node to right of self.
  • side (str) – to which side of its parent does self find itself, either ‘right’ or ‘left’
__init__(nd_id, pa_nd, side, init_unitary_mat=None)[source]

Constructor

Parameters:
  • nd_id (int) –
  • pa_nd (Node|None) –
  • side (str|None) –
  • init_unitary_mat (np.ndarray) – This is the matrix that is fed to CS_Decomp.get_csd() in root node constructor. pa_nd and side are ignored if this is not None.
__str__()[source]

Gives a readable description of self when self is ordered to print. For example, if nd_id = 3, level = 4, node prints as ‘3(L4)’.

Returns:
Return type:str
is_barren()[source]

Returns True iff node’s left, central and right matrix lists are all None.

Returns:
Return type:bool
make_barren()[source]

Sets node’s left, central and right matrix lists to None.

Returns:
Return type:None