Here, a location is identified by the index of the Moment (in the Circuit) where the insertion is requested to be placed at (in the case of Circuit.append, this means inserting at the Moment, at an index one greater than the maximum moment index in the Circuit).
InsertStrategiesĬirq.InsertStrategy defines how Operations are placed in a Circuit when requested to be inserted at a given location.
By default, InsertStrategy is InsertStrategy.NEW_THEN_INLINE.
PRINT CIRCUIT IN ICIRCUIT HOW TO
How did Circuit know how to do this? The Circuit.append method (and its cousin, Circuit.insert) both take an argument called strategy of type cirq.InsertStrategy.
(0, 0): 0): 0): has again created two Moment objects. What happens when you append all of these at once? circuit = cirq.Circuit()
PRINT CIRCUIT IN ICIRCUIT FULL
(0, 0): 0): 0): two examples appended full moments. This appended a new moment to the qubit, which you can continue to do: circuit.append() One of the most useful ways to construct a Circuit is by appending onto the Circuit with the Circuit.append method. Instead, Cirq provides a variety of different ways to create a Circuit.
PRINT CIRCUIT IN ICIRCUIT SERIES
Constructing circuitsĬonstructing Circuits as a series of hand-crafted Moment objects is tedious. (0, 0): 1): 2): that the above is one of the many ways to construct a Circuit, which illustrates the concept that a Circuit is an iterable of Moment objects. Here, for example, is a simple circuit made up of two moments: cz01 = cirq.CZ(qubits, qubits)Ĭircuit = cirq.Circuit((moment0, moment1)) The first Moment in this series contains the first Operations that will be applied. The above is not the only way one can construct moments, nor even the typical method, but illustrates that a Moment is just a collection of operations on disjoint sets of qubits.įinally, at the top level, a cirq.Circuit is an ordered series of cirq.Moment objects. For example, here is a Moment in which Pauli X and a CZ gate operate on three qubits: cz = cirq.CZ(qubits, qubits) The Moment structure itself is not required to be related to the actual scheduling of the operations on a quantum computer or via a simulator, though it can be. # Applying it to the qubit at location (0, 0) (defined above)Ī cirq.Moment is simply a collection of operations, each of which operates on a different set of qubits, and which conceptually represents these operations as occurring during this abstract time slice. Doing this turns a cirq.Gate into a cirq.Operation. This can be done via the gate.on(*qubits) method itself or via gate(*qubits). The important property of a gate is that it can be applied to one or more qubits. A cirq.Gate represents a physical process that occurs on a qubit. The next level up is the notion of cirq.Gate. For example, you can create a 3 by 3 grid of qubits using: qubits = (3) For this, the class cirq.GridQubit subclasses cirq.Qid. For example, the qubits that Google’s devices use are often arranged on the vertices of a square grid. Different subclasses of Qid can be used for different purposes. In Cirq, qubits and other quantum objects are identified by instances of subclasses of the cirq.Qid base class. An Operation is some effect that operates on a specific subset of Qubits the most common type of Operation is a GateOperation.Īt the base of this construction is the notion of a qubit. A Moment is a collection of Operations that all act during the same abstract time slice. The primary representation of quantum programs in Cirq is the Circuit class.
0 kommentar(er)
