Constant

class Constant(duration, amp, name=None, limit_amplitude=None)

Bases: SymbolicPulse

A simple constant pulse, with an amplitude value and a duration:

\[f(x) = amp , 0 <= x < duration f(x) = 0 , elsewhere\]

Create new pulse instance.

Parameters

• duration (Union[int, ParameterExpression]) -- Pulse length in terms of the sampling period dt.

• amp (Union[complex, ParameterExpression]) -- The amplitude of the constant square pulse.

• name (Optional[str]) -- Display name for this pulse envelope.

• limit_amplitude (Optional[bool]) -- If True, then limit the amplitude of the waveform to 1. The default is True and the amplitude is constrained to 1.

Methods

draw	Plot the interpolated envelope of pulse.
get_waveform	Return a Waveform with samples filled according to the formula that the pulse represents and the parameter values it contains.
is_parameterized	Return True iff the instruction is parameterized.
validate_parameters	Validate parameters.

Attributes

constraints

Return symbolic expression for the pulse parameter constraints.

Return type

Expr

duration

envelope

Return symbolic expression for the pulse envelope.

Return type

Expr

id

Unique identifier for this pulse.

Return type

int

limit_amplitude = True

name

parameters

Return type

Dict[str, Any]

pulse_type

Return display name of the pulse shape.

Return type

str

valid_amp_conditions

Return symbolic expression for the pulse amplitude constraints.

Return type

Expr