def call_interactive(self, qureg_clone: tqureg, qureg_original: tqureg) -> None:
r"""Interactive call of PyQuest-cffi
Args:
qureg_original: Qureg to be cloned
qureg_clone: Cloned qureg
Raises:
TypeError: The quregs need to be of the same type, so either both density
matrices OR both wave functions
ValueError: The quregs need to contain the same number of qubits
"""
if qureg_clone.isDensityMatrix and qureg_original.isDensityMatrix:
if cheat.getNumQubits()(qureg=qureg_clone) == cheat.getNumQubits()(qureg=qureg_clone):
quest.cloneQureg(qureg_clone, qureg_original)
else:
raise ValueError("The quregs need to contain the same number of qubits")
elif not qureg_clone.isDensityMatrix and not qureg_original.isDensityMatrix:
if cheat.getNumQubits()(qureg=qureg_clone) == cheat.getNumQubits()(qureg=qureg_clone):
quest.cloneQureg(qureg_clone, qureg_original)
else:
raise ValueError("The quregs need to contain the same number of qubits")
else:
raise TypeError("The quregs need to be of the same type, so either both "
+ "density matrices OR both wave functions")
def test_get_simple() -> None:
"""Testing simple get functions.
getStateVectoratIndex/getAmp, getDensityMatrixatRowColumn/getDensityAmp,
getAbsoluteValSquaredatIndex/getProbAmp, getRealAmp, getImagAmp
"""
env = utils.createQuestEnv()()
qureg = utils.createQureg()(2, env)
cheat.initZeroState()(qureg)
index = 1
operator_matrix = np.array([[1, 0, 2, 0], [0, 1, 0, 2], [0, 2, 0, 1],
[2, 0, 1, 0]])
with npt.assert_raises(RuntimeError):
density_matrix = cheat.getDensityAmp()(qureg=qureg, row=1, column=1)
state_vec = cheat.getAmp()(qureg=qureg, index=index)
abs_val_state_vec = cheat.getProbAmp()(qureg=qureg, index=1)
real_val_sate_vec = cheat.getRealAmp()(qureg=qureg, index=1)
imag_val_sate_vec = cheat.getImagAmp()(qureg=qureg, index=1)
num_amps = cheat.getNumAmps()(qureg=qureg)
num_qubits = cheat.getNumQubits()(qureg=qureg)
expec_val = cheat.getExpectationValue()(qureg=qureg,
operator_matrix=operator_matrix)
assert state_vec == 0
assert abs_val_state_vec == 0
assert real_val_sate_vec == 0
assert imag_val_sate_vec == 0
assert num_amps == 4
assert num_qubits == 2
assert expec_val == 1
qureg = utils.createDensityQureg()(2, env)
cheat.initZeroState()(qureg)
with npt.assert_raises(RuntimeError):
state_vec = cheat.getAmp()(qureg=qureg, index=index)
abs_val_state_vec = cheat.getProbAmp()(qureg=qureg, index=1)
real_val_sate_vec = cheat.getRealAmp()(qureg=qureg, index=1)
imag_val_sate_vec = cheat.getImagAmp()(qureg=qureg, index=1)
density_matrix = cheat.getDensityAmp()(qureg=qureg, row=1, column=1)
num_amps = cheat.getNumAmps()(qureg=qureg)
num_qubits = cheat.getNumQubits()(qureg=qureg)
expec_val = cheat.getExpectationValue()(qureg=qureg,
operator_matrix=operator_matrix)
assert density_matrix == 0
assert num_amps == 4
assert num_qubits == 2
assert expec_val == 1
def call_interactive(self,
qureg: tqureg,
pauli_hamil: paulihamil,
workspace: tqureg
) -> float:
r"""Interactive call of PyQuest-cffi
Args:
qureg: quantum register that is measured
pauli_hamil: a PauliHamil created with createPauliHamil()
workspace: A qureg of same type and size as input qureg, is used as temporary
work qureg
Returns:
float
Raises:
RuntimeError: Qureg and PauliHamil must be defined for the same number of qubits
"""
if not (cheat.getNumQubits()(qureg=qureg) == pauli_hamil.numQubits):
raise RuntimeError("Qureg and PauliHamil must be defined for the "
+ "same number of qubits")
return quest.calcExpecPauliHamil(qureg,
pauli_hamil,
workspace)
def call_interactive(self, qureg: tqureg) -> int:
r"""Interactive call of PyQuest-cffi
Args:
qureg: a qureg containing a wavefunction or a density matrix
Returns:
int
"""
if qureg.isDensityMatrix:
return 2 ** cheat.getNumQubits()(qureg=qureg)
else:
return quest.getNumAmps(qureg)
def call_interactive(self, qureg: tqureg, probability: float,
qureg_other: tqureg) -> None:
r"""Interactive call of PyQuest-cffi
Args:
qureg: quantum register to be modified
probability: the probability of qureg_other in the modified qureg
qureg_other: the quantum register to be mixed into qureg
Raises:
RuntimeError: Both quregs must be density matrix,
but at least one of them is a wavefunction
RuntimeError: Qureg and Qureg_other must be defined for the same number of qubits
"""
if not qureg.isDensityMatrix or not qureg_other.isDensityMatrix:
raise RuntimeError("Both quregs must be density matrix, " +
"but at least one of them is a wavefunction")
elif not (cheat.getNumQubits()(qureg=qureg)
== cheat.getNumQubits()(qureg=qureg_other)):
raise RuntimeError("Qureg and Qureg_other must be defined " +
"for the same number of qubits")
else:
quest.mixDensityMatrix(qureg, probability, qureg_other)
def call_interactive(self, qureg: tqureg, reals: Union[np.ndarray,
List[float]],
imags: Union[np.ndarray, List[float]]) -> None:
r"""Interactive call of PyQuest-cffi
Args:
qureg: the quantum register
reals: The real parts of the statevector
imags: The imaginary parts of the statevector
Raises:
RuntimeError: Size of reals and imags needs to match
RuntimeError: Shape of reals and imags for wavefunction should be: (1, 2**qubits)
RuntimeError: Shape of reals and imags for density matrix should be:
(2**qubits, 2**qubits) OR (4**qubits, 1)
RuntimeError: Shape of reals and imags for density matrix should be:
(2**qubits, 2**qubits) OR (4**qubits, 1)
RuntimeError: Need to set real and imaginary amplitudes for each qubit:
2**qubits for wavefunction qureg, 4**qubits for density matrix qureg
"""
reals = list(reals)
imags = list(imags)
assert len(reals) == np.max(np.shape(reals))
assert len(imags) == np.max(np.shape(imags))
size_amps = np.size(np.array(reals))
if not size_amps == np.size(np.array(imags)):
raise RuntimeError("Size of reals and imags needs to match")
num_qubits = cheat.getNumQubits()(qureg=qureg)
if size_amps == 2**num_qubits:
if qureg.isDensityMatrix:
raise RuntimeError(
"Shape of reals and imags for wavefunction should be: " +
"(1, 2**qubits)")
pointer_reals = ffi_quest.new("{}[{}]".format(qreal, len(reals)))
for co, c in enumerate(reals):
pointer_reals[co] = c
pointer_imags = ffi_quest.new("{}[{}]".format(qreal, len(imags)))
for co, c in enumerate(imags):
pointer_imags[co] = c
quest.initStateFromAmps(qureg, pointer_reals, pointer_imags)
elif size_amps == 4**num_qubits:
if not qureg.isDensityMatrix:
raise RuntimeError(
"Shape of reals and imags for density matrix should be:" +
"(2**qubits, 2**qubits) OR (4**qubits, 1)")
size_amps_rows = np.size(np.array(reals), 0)
size_amps_columns = np.size(np.array(reals), 1)
if (not (size_amps_rows == np.size(np.array(imags), 0))
or not (size_amps_columns == np.size(np.array(imags), 1))):
raise RuntimeError("Size of reals and imags needs to match")
cheat.initZeroState()(qureg=qureg)
if (size_amps_rows == size_amps_columns == 2**num_qubits):
cheat.setDensityAmps()(qureg=qureg, reals=reals, imags=imags)
elif size_amps_rows == 4**num_qubits:
reals = np.array(reals).reshape((2**num_qubits, 2**num_qubits))
imags = np.array(imags).reshape((2**num_qubits, 2**num_qubits))
cheat.setDensityAmps()(qureg=qureg, reals=reals, imags=imags)
else:
raise RuntimeError(
"Shape of reals and imags should be (2**qubits, 2**qubits) OR "
+ "(4**qubits, 1)")
else:
raise RuntimeError(
"Need to set real and imaginary amplitudes for each qubit: " +
"2**qubits for wavefunction, 4**qubits for density matrix")