dq.zero
zero(*dims: int) -> Array
Returns the null operator.
If only a single dimension is provided, zero
returns the null operator
of corresponding dimension. If instead multiples dimensions are provided, zero
returns the null operator of the composite Hilbert space given by the product
of all dimensions.
Parameters
-
*dims
–
Variable length argument list of the Hilbert space dimensions.
Returns
(array of shape (n, n)) Null operator (with n the product of dimensions
in dims
).
Examples
>>> dq.zero(4)
Array([[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j]], dtype=complex64)
>>> dq.zero(2, 3)
Array([[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
[0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j]], dtype=complex64)