Configuration

The configuration of pulse_lib is stored in a pulselib object. This object is needed to create segments and sequences.

Create pulselib object with specific backend

A pulselib object must created for a specific backend for the hardware.

from pulse_lib.base_pulse import pulselib

pl = pulselib('Keysight')

# Add channels ...
# Configure channels ....

At the end, after adding and configuring all channels, pl.finish_init() must be called to complete the initialization.

Add AWGs and digitizers

pl.add_awg(awg1)
pl.add_awg(awg2)
pl.add_digitizer(digitizer)

Note: Qblox QRM should be added as a digitizer. See @@@

Gates (voltage channels)

Gates (voltage channels) should be defined with a name for the channel and a name and channel number of the AWG.

The channel delay specifies the amount of delay that should be added to the signal. The channel attenuation is expressed in the fraction of the amplitude after attenuation. The DC compensation limits are specified in AWG voltage before attenuation.

pl.add_channel("P1', awg1.name, 1)
pl.add_channel_delay('P1', 17)

# 0.01 = -20 dB attenuation
pl.add_channel_attenuation('P1', 0.01)

# Add limits on voltages for DC channel compensation.
# When no limit is specified then no DC compensation is performed.
# Limits are specified in AWG voltage before attenuation.
pl.add_channel_compensation_limit('P1', (-200, 500))

# Add compensation for bias-T with RC-time of 0.109 s
pl.add_channel_bias_T_compensation('P1', 0.109)

Virtual matrix

keep_square and @@@ are optional parameters that can only be set when real2virtual=True. ???

pl.add_virtual_matrix(
  name='virtual-gates',
  real_gate_names=['B0', 'P1', 'B1', 'P2', 'B2'],
  virtual_gate_names=['vB0', 'vP1', 'vB1', 'vP2', 'vB2'],
  matrix=[
      [1.00, 0.25, 0.05, 0.00, 0.00],
      [0.14, 1.00, 0.12, 0.02, 0.00],
      [0.05, 0.16, 1.00, 0.11, 0.01],
      [0.02, 0.09, 0.18, 1.00, 0.16],
      [0.00, 0.01, 0.013 0.21, 1.00]
      ],
  real2virtual=True,
  keep_square=Tue,
  @@@)

pl.add_virtual_matrix(
  name='detuning12',
  real_gate_names=['vP1', 'vP2'],
  virtual_gate_names=['e12', 'U12'],
  matrix=[
      [+0.5, +1.0],
      [-0.5, +1.0],
      ],
  real2virtual=False)

Qubit channels (MW channels)

from pulse_lib.virtual_channel_constructors import IQ_channel_constructor

pl.add_channel("I1', awg2.name, 3)
pl.add_channel("Q1', awg2.name, 4)
pl.add_channel_delay('I1', -52)
pl.add_channel_delay('Q1', -52)

# define IQ output pair
IQ_pair_1 = IQ_channel_constructor(pulse)
IQ_pair_1.add_IQ_chan("I1", "I")
IQ_pair_1.add_IQ_chan("Q1", "Q")

# frequency of the MW source
IQ_pair_1.set_LO(lo_freq)

# add channel for qubit q1 with idle frequency 3.213 GHz
IQ_pair_1.add_virtual_IQ_channel("q1", 3.213e9)
# add channel for qubit q2 with idle frequency 3.386 GHz
IQ_pair_1.add_virtual_IQ_channel("q2", 3.386e9)

IQ phase-gain compensation Offset add marker

Marker channels

delay

Digitizer channels

Note: Digitizers triggers

pl.define_digitizer_channel('SD1', digitizer.name, 1)

IQ input pair

RF-source