Expression of type MultiQubitElem

from the theory of proveit.physics.quantum.circuits

import proveit
# Automation is not needed when building an expression:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%load_expr # Load the stored expression as 'stored_expr'
# import Expression classes needed to build the expression
from proveit import A, IndexedVar, R, Variable
from proveit.physics.quantum.circuits import MultiQubitElem

# build up the expression from sub-expressions
sub_expr1 = [Variable("_b", latex_format = r"{_{-}b}"), Variable("_a", latex_format = r"{_{-}a}")]
expr = MultiQubitElem(element = IndexedVar(A, sub_expr1), targets = IndexedVar(R, sub_expr1))

expr:

# check that the built expression is the same as the stored expression
assert expr == stored_expr
assert expr._style_id == stored_expr._style_id
print("Passed sanity check: expr matches stored_expr")

Passed sanity check: expr matches stored_expr

# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())

\begin{array}{c} \Qcircuit@C=1em @R=.7em{
& & \gate{A_{{_{-}b}, {_{-}a}}~\mbox{on}~R_{{_{-}b}, {_{-}a}}} & \qw 
} \end{array}

stored_expr.style_options()

no style options

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	Operation	operator: 1 operands: 2
1	Literal
2	NamedExprs	element: 3 targets: 4
3	IndexedVar	variable: 5 indices: 7
4	IndexedVar	variable: 6 indices: 7
5	Variable
6	Variable
7	ExprTuple	8, 9
8	Variable
9	Variable