quairkit.core.state.backend.density_matrix¶

The source file of the density_matrix backend.

class quairkit.core.state.backend.density_matrix.MixedState(data, sys_dim, system_seq=None, probability=None)¶

The mixed state class.

Parameters:¶

data : Tensor¶: tensor array (in density matrix representation) for quantum mixed state(s).
sys_dim : List[int]¶: a list of dimensions for each system.
system_seq : List[int] | None¶: the system order of this state. Defaults to be from 1 to n.
probability : List[Tensor] | None¶: list of state probability distributions. Defaults to be 1.

Note

The data is stored in the matrix-form with shape \((-1, d, d)\)