#
# Copyright © 2022-2023 University of Strasbourg. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from mimiqcircuits.operations.operation import Operation
import mimiqcircuits as mc
import copy
import numpy as np
def _allunique(lst):
seen = set()
for element in lst:
if element in seen:
return False
seen.add(element)
return True
[docs]
class Instruction:
"""Initializes an instruction of a quantum circuit.
Args:
operation (Operation): The operation applied by the instruction.
qubits (tuple of int): The qubits to apply the quantum operation to.
bits (tuple of int): The classical bits to apply the quantum operation to.
Raises:
TypeError: If operation is not a subclass of Gate or qubits is not a tuple.
ValueError: If qubits contains less than 1 or more than 2 elements.
Examples:
>>> from mimiqcircuits import *
>>> Instruction(GateX(),(0,),())
X @ q[0]
>>> Instruction(Barrier(4),(0,1,2,3),())
Barrier @ q[0,1,2,3]
"""
_operation = None
_qubits = None
_bits = None
def __init__(self, operation, qubits=None, bits=None):
if qubits is None:
qubits = tuple()
if bits is None:
bits = tuple()
if not isinstance(qubits, tuple):
raise TypeError(
f"Target qubits should be given in a tuple of integers. Given {qubits} of type {type(qubits)}."
)
if not isinstance(bits, tuple):
raise TypeError(
f"Target bits should be given in a tuple of integers. Given {bits} of type {type(bits)}."
)
if not isinstance(operation, Operation):
raise TypeError(
f"Operation must be a subclass of Operation. Given {operation} of type f{type(operation)}"
)
if not _allunique(qubits):
raise ValueError("Duplicated qubit target in instruction")
if not _allunique(bits):
raise ValueError("Duplicated classical bit target in instruction")
for qi in qubits:
if qi < 0:
raise ValueError("Qubit target index cannot be negative")
for bi in bits:
if bi < 0:
raise ValueError("Bit target index cannot be negative")
if len(qubits) != operation.num_qubits:
raise ValueError(
f"Wrong number of target qubits for operation {operation} wanted {operation.num_qubits}, given {len(qubits)}"
)
if len(bits) != operation.num_bits:
raise ValueError(
f"Wrong number of target bits for operation {operation} wanted {operation.num_bits}, given {len(bits)}"
)
self._operation = operation
self._qubits = qubits
self._bits = bits
@property
def operation(self):
return self._operation
@operation.setter
def operation(self, _):
raise AttributeError("operation is a read-only attribute")
@property
def qubits(self):
return self._qubits
@qubits.setter
def qubits(self, _):
raise AttributeError("qubits is a read-only attribute")
@property
def bits(self):
return self._bits
@bits.setter
def bits(self, _):
raise AttributeError("bits is a read-only attribute")
def __repr__(self):
return str(self)
def get_operation(self):
return self._operation
[docs]
def get_qubits(self):
return self._qubits
[docs]
def get_bits(self):
return self._bits
[docs]
def get_operation(self):
return self.operation
[docs]
def asciiwidth(self):
return self.operation.asciiwidth(self._qubits, self._bits)
def __eq__(self, other):
if not isinstance(other, Instruction):
return False
return (
(self.operation == other.operation)
and (self.qubits == other.qubits)
and (self.bits == other.bits)
)
[docs]
def inverse(self):
return Instruction(self.operation.inverse(), self.qubits, self.bits)
[docs]
def copy(self):
return copy.copy(self)
[docs]
def deepcopy(self):
return copy.deepcopy(self)
def _decompose(self, circ):
return self.operation._decompose(circ, self.qubits, self.bits)
[docs]
def decompose(self):
return self._decompose(mc.Circuit())
[docs]
def evaluate(self, d):
return Instruction(self.operation.evaluate(d), self.qubits, self.bits)
def __str__(self):
compact = False
op = str(self.operation)
nq = len(self.qubits)
nb = len(self.bits)
space = "" if compact else " "
targets = ""
if nq != 0 or nb != 0:
targets = f"{space}@{space}"
if nq != 0:
q_partition = _partition(
self.get_qubits(), np.cumsum(self.operation.qregsizes)
)
q_targets = f",{space}".join(
f"q{_string_with_square(_find_unit_range(x),',')}"
for x in q_partition
)
targets += f",".join(q_targets.split(","))
if nb != 0:
c_partition = _partition(
self.get_bits(), np.cumsum(self.operation.cregsizes)
)
c_targets = f", {space}".join(
f", c{_string_with_square(x, ',')}" for x in c_partition
)
targets += c_targets
return f"{op}{targets}"
def _partition(arr, indices):
vec = list(arr)
partitions = [vec[: indices[0]]]
for i in range(1, len(indices)):
partitions.append(vec[indices[i - 1] : indices[i]])
return partitions
def _string_with_square(arr, sep):
return (
"["
+ sep.join(
map(lambda e: sep.join(map(str, e)) if isinstance(e, list) else str(e), arr)
)
+ "]"
)
def _find_unit_range(arr):
if len(arr) < 2:
return arr
narr = []
rangestart = arr[0]
rangestop = arr[0]
for v in arr[1:]:
if v == rangestop + 1:
rangestop = v
elif rangestart == rangestop:
narr.append(rangestart)
rangestart = v
rangestop = v
else:
narr.append(list(range(rangestart, rangestop + 1)))
rangestart = v
rangestop = v
if rangestart == rangestop:
narr.append(rangestart)
else:
narr.append(list(range(rangestart, rangestop + 1)))
return narr
__all__ = ["Instruction"]
