cirq.pasqal.PasqalVirtualDevice

A Pasqal virtual device with qubits in 3d.

Inherits From: PasqalDevice, Device

cirq.pasqal.PasqalVirtualDevice(
    control_radius: float,
    qubits: Sequence[Union[ThreeDQubit, GridQubit, LineQubit]]
) -> None

Used in the notebooks

Used in the tutorials

A virtual representation of a Pasqal device, enforcing the constraints typically found in a physical device. The qubits can be positioned in 3d space, although 2d layouts will be supported sooner and are thus recommended. Only accepts qubits with physical placement.

control_radius the maximum distance between qubits for a controlled gate. Distance is measured in units of the coordinates passed into the qubit constructor.
qubits Qubits on the device, identified by their x, y, z position. Must be of type ThreeDQubit, TwoDQubit, LineQubit or GridQubit.

ValueError if the wrong qubit type is provided or if invalid parameter is provided for control_radius.

maximum_qubit_number

supported_qubit_type

Methods

can_add_operation_into_moment

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can_add_operation_into_moment(
    operation: cirq.ops.Operation,
    moment: cirq.ops.Moment
) -> bool

Determines if it's possible to add an operation into a moment.

An operation can be added if the moment with the operation added is valid.

Args
operation The operation being added.
moment The moment being transformed.

Returns
Whether or not the moment will validate after adding the operation.

Raises
ValueError If either of the given moment or operation is invalid

decompose_operation

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decompose_operation(
    operation: cirq.ops.Operation
) -> "cirq.OP_TREE"

Returns a device-valid decomposition for the given operation.

This method is used when adding operations into circuits with a device specified, to avoid spurious failures due to e.g. using a Hadamard gate that must be decomposed into native gates.

distance

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distance(
    p: Any,
    q: Any
) -> float

Returns the distance between two qubits.

Args
p qubit involved in the distance computation
q qubit involved in the distance computation

Raises
ValueError If p or q not part of the device

Returns
The distance between qubits p and q.

is_pasqal_device_op

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is_pasqal_device_op(
    op: cirq.ops.Operation
) -> bool

minimal_distance

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minimal_distance() -> float

Returns the minimal distance between two qubits in qubits.

Args
qubits qubit involved in the distance computation

Raises
ValueError If the device has only one qubit

Returns
The minimal distance between qubits, in spacial coordinate units.

qubit_list

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qubit_list()

qubit_set

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qubit_set() -> FrozenSet[cirq.ops.Qid]

Returns a set or frozenset of qubits on the device, if possible.

Returns
If the device has a finite set of qubits, then a set or frozen set of all qubits on the device is returned.

If the device has no well defined finite set of qubits (e.g. cirq.UnconstrainedDevice has this property), then None is returned.

validate_circuit

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validate_circuit(
    circuit: "cirq.Circuit"
) -> None

Raises an error if the given circuit is invalid on this device.

A circuit is invalid if any of its moments are invalid or if there is a non-empty moment after a moment with a measurement.

Args
circuit The circuit to validate

Raises
ValueError If the given circuit can't be run on this device

validate_moment

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validate_moment(
    moment: cirq.ops.Moment
)

Raises an error if the given moment is invalid on this device.

Args
moment The moment to validate.

Raises
ValueError If the given moment is invalid.

validate_operation

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validate_operation(
    operation: cirq.ops.Operation
)

Raises an error if the given operation is invalid on this device.

Args
operation the operation to validate

Raises
ValueError If the operation is not valid

__eq__

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__eq__(
    other: _SupportsValueEquality
) -> bool

__ne__

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__ne__(
    other: _SupportsValueEquality
) -> bool