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Fix density matrix references in other simulators #6537

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Mar 30, 2024
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Fix density matrix references in other simulators #6537

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2 changes: 1 addition & 1 deletion cirq-core/cirq/sim/simulation_state.py
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Original file line number Diff line number Diff line change
Expand Up @@ -111,7 +111,7 @@ def get_axes(self, qubits: Sequence['cirq.Qid']) -> List[int]:
return [self.qubit_map[q] for q in qubits]

def _perform_measurement(self, qubits: Sequence['cirq.Qid']) -> List[int]:
"""Delegates the call to measure the density matrix."""
"""Delegates the call to measure the `QuantumStateRepresentation`."""
if self._state is not None:
return self._state.measure(self.get_axes(qubits), self.prng)
raise NotImplementedError()
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8 changes: 4 additions & 4 deletions cirq-core/cirq/sim/state_vector_simulation_state.py
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Expand Up @@ -60,11 +60,11 @@ def create(
This initializer creates the buffer if necessary.

Args:
initial_state: The density matrix, must be correctly formatted. The data is not
initial_state: The state vector, must be correctly formatted. The data is not
checked for validity here due to performance concerns.
qid_shape: The shape of the density matrix, if the initial state is provided as an int.
dtype: The dtype of the density matrix, if the initial state is provided as an int.
buffer: Optional, must be length 3 and same shape as the density matrix. If not
qid_shape: The shape of the state vector, if the initial state is provided as an int.
dtype: The dtype of the state vector, if the initial state is provided as an int.
buffer: Optional, must be length 3 and same shape as the state vector. If not
provided, a buffer will be created automatically.
Raises:
ValueError: If initial state is provided as integer, but qid_shape is not provided.
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