qml.devices.qutrit_mixed.apply_operation

apply_operation(op, state, is_state_batched=False, debugger=None, **_)

Apply an operation to a given state.

Parameters

• op (Operator) – The operation to apply to state

• state (TensorLike) – The starting state.

• is_state_batched (bool) – Boolean representing whether the state is batched or not

• debugger (_Debugger) – The debugger to use

Keyword Arguments

• rng (Optional[numpy.random._generator.Generator]) – A NumPy random number generator.

• prng_key (Optional[jax.random.PRNGKey]) – An optional jax.random.PRNGKey. This is the key to the JAX pseudo random number generator. Only for simulation using JAX. If None, a numpy.random.default_rng will be used for sampling.

• tape_shots (Shots) – the shots object of the tape

Returns

output state

Return type

ndarray

Warning

apply_operation is an internal function, and thus subject to change without a deprecation cycle.

Warning

apply_operation applies no validation to its inputs.

This function assumes that the wires of the operator correspond to indices of the state. See map_wires() to convert operations to integer wire labels.

The shape of state should be [QUDIT_DIM]*(num_wires * 2), where QUDIT_DIM is the dimension of the system.

This is a functools.singledispatch function, so additional specialized kernels for specific operations can be registered like:

@apply_operation.register
def _(op: type_op, state):
    # custom op application method here

Example:

>>> state = np.zeros((3,3))
>>> state[0][0] = 1
>>> state
tensor([[1., 0., 0.],
    [0., 0., 0.],
    [0., 0., 0.]], requires_grad=True)
>>> apply_operation(qml.TShift(0), state)
tensor([[0., 0., 0.],
    [0., 1., 0],
    [0., 0., 0.],], requires_grad=True)

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