atlas_q.grover.FunctionOracle#

class atlas_q.grover.FunctionOracle(n_qubits, marking_fn, device='cuda', dtype=torch.complex128)[source]#

Oracle based on a marking function

Marks states where f(x) = True by applying phase flip. Implements O_f |x⟩ = (-1)^f(x) |x⟩

Example:: # Mark state |5⟩ oracle = FunctionOracle(n_qubits=4, marking_fn=lambda x: x == 5)

Methods

`apply`(mps)	Apply oracle by marking all states where marking_fn returns True
`get_marked_count`()	Return number of marked items
`mark`(mps, state)	Mark a specific basis state by flipping its phase

__init__(n_qubits, marking_fn, device='cuda', dtype=torch.complex128)[source]#

Methods

`__init__`(n_qubits, marking_fn[, device, dtype])
`apply`(mps)	Apply oracle by marking all states where marking_fn returns True
`get_marked_count`()	Return number of marked items
`mark`(mps, state)	Mark a specific basis state by flipping its phase

apply(mps)[source]#

Apply oracle by marking all states where marking_fn returns True