Multiplication of classical array and QuantumArray with qtype=QuantumModulus

[renezander90]

Consider the following example:

from qrisp import *
import numpy as np

s = QuantumArray(qtype = QuantumModulus(5), shape = (2,1))

# 1) Wrong result for:
s[:] = np.array([[3],[0]])

# 2) Error occurs for:
#s[:] = np.array([[3],[1]])

A = np.array([[3,4]])
res = A @ s

print(res)

1) The wrong result 1 is obtained. Correct would be (3 * 3 + 4 * 0) % 5 = 9 % 5 = 4.

Note that Theo following works correctly:

s = QuantumModulus(5)
s[:] = 3

t = QuantumModulus(5)
t[:] = 0

print(3*s+4*t)

Yields: 4

2) An error occurs:

ValueError: cannot convert float NaN to integer

Correct would be (3 * 3 + 4 * 1) % 5 = 13 % 5 = 3.

Note that the following works correctly:

s = QuantumModulus(5)
s[:] = 3

t = QuantumModulus(5)
t[:] = 1

print(3*s+4*t)

Yields: 3