Note

This is the documentation for the current state of the development branch of Qiskit Experiments. The documentation or APIs here can change prior to being released.

EchoedCrossResonance¶

class EchoedCrossResonance(basis_gates=None, default_values=None, target_pulses=True)[source]¶

A library for echoed cross-resonance gates.

The cr45p and cr45m include a pulse on the control qubit and optionally a pulse on the target qubit.

Provided gates:

cr45p: GaussianSquare cross-resonance gate for a $+ π / 4$ rotation.
cr45m: GaussianSquare cross-resonance gate for a $- π / 4$ rotation.
ecr: Echoed cross-resonance gate defined as cr45p - x - cr45m.
rzx: RZXGate built from the ecr as cr45p - x - cr45m - x.

Required gates:

x: the x gate is defined outside of this library, see FixedFrequencyTransmon.

Pulse parameters:

tgt_amp: The amplitude of the pulse applied to the target qubit. Default value: 0.
σ: The standard deviation of the flanks. Default value: 64 samples.
amp: The amplitude of the pulses applied to the control qubit. Default value: 50%.
duration: The duration of the cr45p and cr45m pulses. Default value: 1168 samples.
risefall: The number of σ’s in the flanks of the pulses. Default value: 2.

Setup the library.

Parameters:

basis_gates (Optional[List[str]]) – The basis gates to generate.
default_values (Optional[Dict]) – A dictionary to override library default parameter values.
target_pulses (bool) – If True (the default) then drives will be added to the target qubit during the CR tones on the control qubit.

Attributes

EchoedCrossResonance.basis_gates

Return the basis gates supported by the library.

Methods

`EchoedCrossResonance.__getitem__`(name)	Return the schedule.
`EchoedCrossResonance.__len__`()	The length of the library defined as the number of basis gates.
`EchoedCrossResonance.config`()	Return the settings used to initialize the library.
`EchoedCrossResonance.default_values`()	The default values of the CR library.
`EchoedCrossResonance.from_config`(config)	Deserialize the library given the input dictionary
`EchoedCrossResonance.get`(k[,d])
`EchoedCrossResonance.items`()
`EchoedCrossResonance.keys`()
`EchoedCrossResonance.num_qubits`(name)	Return the number of qubits that the schedule with the given name acts on.
`EchoedCrossResonance.values`()
`EchoedCrossResonance.__len__`()	The length of the library defined as the number of basis gates.
`EchoedCrossResonance.__getitem__`(name)	Return the schedule.