qoqo.operations.PragmaDamping

class qoqo.operations.PragmaDamping

The damping PRAGMA noise operation.

This PRAGMA operation applies a pure damping error corresponding to zero temperature environments.

Note

Damping means going from state |1> to |0> and corresponds to zero-temperature in a physical device where |0> is the ground state. With respect to the definition of the Pauli operator Z, |0> is the excited state and damping leads to an increase in energy.

Parameters:

qubit (int) – The qubit on which to apply the damping.
gate_time (CalculatorFloat) – The time (in seconds) the gate takes to be applied to the qubit on the (simulated) hardware
rate (CalculatorFloat) – The error rate of the damping (in 1/second).

__init__()

Methods

`__init__`()
`gate_time`()	Returns value of attribute gate_time
`hqslang`()	Returns hqslang name of Operation
`involved_qubits`()	List all involved Qubits
`is_parametrized`()	Returns true if operation contains symbolic parameters
`powercf`(power)	Return the power of the noise gate
`probability`()	Returns the probability associated with the noise operation
`qubit`()	Return the qubit the operation acts on
`rate`()	Returns value of attribute rate
`remap_qubits`(mapping)	Remap qubits
`substitute_parameters`(substitution_parameters)	Substitutes internal symbolic parameters with float values
`superoperator`()	Return the superoperator defining the evolution of the density matrix under the noise gate
`tags`()	Returns tags identifying the Operation

gate_time(): Returns value of attribute gate_time

hqslang()

Returns hqslang name of Operation

Returns:: The name
Return type:: str

involved_qubits()

List all involved Qubits

Returns:: The involved qubits as a set or ‘ALL’ if all qubits are involved
Return type:: Union[set[int], str]

is_parametrized()

Returns true if operation contains symbolic parameters

Returns:: bool

powercf(power)

Return the power of the noise gate

Parameters:: power (CalculatorFloat) – exponent in the power operation of the noise gate
Returns:: Self

probability()

Returns the probability associated with the noise operation

Returns:: CalculatorFloat

qubit()

Return the qubit the operation acts on

Returns:: int

rate(): Returns value of attribute rate

remap_qubits(mapping)

Remap qubits

Parameters:: mapping (dict[int, int]) – The mapping
Returns:: The operation with the remapped qubits
Return type:: Operation
Raises:: RuntimeError – Qubit remapping failed

substitute_parameters(substitution_parameters)

Substitutes internal symbolic parameters with float values

Only available when all symbolic expressions can be evaluated to float with the provided parameters.

Parameters:: substitution_parameters (dict[str, float]) – The substituted free parameters
Returns:: The operation with the parameters substituted
Return type:: Operation
Raises:: RuntimeError – Parameter Substitution failed

superoperator()

Return the superoperator defining the evolution of the density matrix under the noise gate

Returns:: np.ndarray

tags()

Returns tags identifying the Operation

Returns:: The tags identifying the operation
Return type:: list[str]