logo

Expression of type Qcircuit

from the theory of proveit.physics.quantum.circuits

In [1]:
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, ExprRange, Variable, VertExprArray, m
from proveit.numbers import Interval, one
from proveit.physics.quantum.circuits import MultiQubitElem, Output, Qcircuit
In [2]:
# build up the expression from sub-expressions
sub_expr1 = Variable("_a", latex_format = r"{_{-}a}")
expr = Qcircuit(vert_expr_array = VertExprArray([ExprRange(sub_expr1, MultiQubitElem(element = Output(state = A, part = sub_expr1), targets = Interval(one, m)), one, m)]))
expr:
In [3]:
# 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
In [4]:
# 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{
& \qout{A}
} \end{array}
In [5]:
stored_expr.style_options()
namedescriptiondefaultcurrent valuerelated methods
spacingchange the spacing of a circuit using the format '@C=1em @R=.7em' where C is the column spacing and R is the row spacing@C=1em @R=.7em@C=1em @R=.7em
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0Operationoperator: 1
operand: 3
1Literal
2ExprTuple3
3ExprTuple4
4ExprRangelambda_map: 5
start_index: 18
end_index: 19
5Lambdaparameter: 17
body: 7
6ExprTuple17
7Operationoperator: 8
operands: 9
8Literal
9NamedExprselement: 10
targets: 11
10Operationoperator: 12
operands: 13
11Operationoperator: 14
operands: 15
12Literal
13NamedExprsstate: 16
part: 17
14Literal
15ExprTuple18, 19
16Variable
17Variable
18Literal
19Variable