supergrad.time_evolution.pulseshape.PulseErf

class supergrad.time_evolution.pulseshape.PulseErf(length=None, amp=None, delay=0, modulate_wave=False, name: str = 'pulse_erf', **kwargs)

Creates error function up/down pulse, integral 1.

Both up and down parts are erf style, controlled by sigma. the erf function is truncated at sigma=-cutoff(as t=0) and sigma=+cutoff(as t=tmax) The pulse is nearly flat in the middle if sigma is small.

Parameters:

• length – the length of pulse

• amp – the amplitude of pulse

• delay – time delay for waiting other gate operations, unit in ns

• modulate_wave (bool) – True for generate modulated sine wave

• name – module name

sigma

the sigma of erf function

cutoff

the cutoff of erf function

Returns:

an array of amplitudes

__init__(length=None, amp=None, delay=0, modulate_wave=False, name: str = 'pulse_erf', **kwargs)

Initializes the current module with the given name.

Subclasses should call this constructor before creating other modules or variables such that those modules are named correctly.

Parameters:

name – An optional string name for the class. Must be a valid Python identifier. If name is not provided then the class name for the current instance is converted to lower_snake_case and used instead.

Methods

__init__([length, amp, delay, ...])	Initializes the current module with the given name.
create_envelope_pulse(t[, args])	Create envelope pulse shape for various gate operations.
create_pulse(t[, args])	Create desired pulse shape for various gate operations.
params_dict()	Returns parameters keyed by name for this module and submodules.
state_dict()	Returns state keyed by name for this module and submodules.

Attributes

pulse_endtime

The time of last pulse frame