Negation

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The negation operation receives a quantum register representing some number

x

and returns a quantum register containing

-x

. Integer and fixed point numbers are both supported.

Example

The following example will show negation of a signed quantum variable.

from classiq import *


@qfunc
def main(a: Output[QNum], b: Output[QNum]) -> None:
    allocate(3, SIGNED, 0, a)
    hadamard_transform(a)
    b |= -a

qprog = synthesize(main)

result = sample(qprog)
result

Output:

Submitting job to simulator
  Job: https://platform.classiq.io/jobs/8591ea24-674d-40a8-befd-cbf3b1470a65
  

	a	b	counts	probability	bitstring
0	3	-3	274	0.133789	1101011
1	-1	1	258	0.125977	0001111
2	-3	3	258	0.125977	0011101
3	1	-1	258	0.125977	1111001
4	-2	2	256	0.125000	0010110
5	-4	4	256	0.125000	0100100
6	0	0	248	0.121094	0000000
7	2	-2	240	0.117188	1110010

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Example

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​Example

Example