Note

This page was generated from circuit-examples/D.Qubit-couplers/31-TwoCrossmonsTunableCoupler.ipynb.

Tunable Coupler (MIT)¶

[1]:

%load_ext autoreload
%autoreload 2

import qiskit_metal as metal
from qiskit_metal import designs, draw
from qiskit_metal import MetalGUI, Dict, Headings
import pyEPR as epr

Create the design in Metal¶

Setup a design of a given dimension. Dimensions will be respected in the design rendering. Note that the design size extends from the origin into the first quadrant.

[2]:

design = designs.DesignPlanar({}, True)
design.chips.main.size["size_x"] = "3mm"
design.chips.main.size["size_y"] = "3mm"

gui = MetalGUI(design)

Create two crossmons coupled together with an interdigitated tunable coupler.

[3]:

from qiskit_metal.qlibrary.qubits.transmon_cross_fl import TransmonCrossFL
from qiskit_metal.qlibrary.couplers.tunable_coupler_01 import TunableCoupler01

[4]:

TransmonCrossFL.get_template_options(design)

[4]:

{'pos_x': '0um',
 'pos_y': '0um',
 'connection_pads': {},
 '_default_connection_pads': {'connector_type': '0',
  'claw_length': '30um',
  'ground_spacing': '5um',
  'claw_width': '10um',
  'claw_gap': '6um',
  'connector_location': '0'},
 'cross_width': '20um',
 'cross_length': '200um',
 'cross_gap': '20um',
 'orientation': '0',
 'layer': '1',
 'make_fl': True,
 'fl_options': {'t_top': '15um',
  't_offset': '0um',
  't_inductive_gap': '3um',
  't_width': '5um',
  't_gap': '3um'},
 'hfss_inductance': '10nH',
 'hfss_capacitance': 0,
 'hfss_resistance': 0,
 'hfss_mesh_kw_jj': 7e-06,
 'q3d_inductance': '10nH',
 'q3d_capacitance': 0,
 'q3d_resistance': 0,
 'q3d_mesh_kw_jj': 7e-06,
 'gds_cell_name': 'my_other_junction'}

[5]:

TunableCoupler01.get_template_options(design)

[5]:

{'pos_x': '0um',
 'pos_y': '0um',
 'connection_pads': {},
 '_default_connection_pads': {},
 'orientation': '0',
 'layer': '1',
 'c_width': '400um',
 'l_width': '20um',
 'l_gap': '10um',
 'a_height': '60um',
 'cp_height': '15um',
 'cp_arm_length': '30um',
 'cp_arm_width': '6um',
 'cp_gap': '6um',
 'cp_gspace': '3um',
 'fl_width': '5um',
 'fl_gap': '3um',
 'fl_length': '10um',
 'fl_ground': '2um',
 'hfss_inductance': '10nH',
 'hfss_capacitance': 0,
 'hfss_resistance': 0,
 'hfss_mesh_kw_jj': 7e-06,
 'q3d_inductance': '10nH',
 'q3d_capacitance': 0,
 'q3d_resistance': 0,
 'q3d_mesh_kw_jj': 7e-06,
 'gds_cell_name': 'my_other_junction'}

[6]:

Q1 = TransmonCrossFL(
    design,
    "Q1",
    options=dict(
        pos_x="0",
        pos_y="-0.3mm",
        connection_pads=dict(
            bus_01=dict(connector_location="180", claw_length="95um"),
            readout=dict(connector_location="0"),
        ),
        fl_options=dict(),
    ),
)

Q2 = TransmonCrossFL(
    design,
    "Q2",
    options=dict(
        pos_x="0",
        pos_y="0.3mm",
        orientation="180",
        connection_pads=dict(
            bus_02=dict(connector_location="0", claw_length="95um"),
            readout=dict(connector_location="180"),
        ),
        fl_options=dict(),
    ),
)


tune_c_Q12 = TunableCoupler01(
    design,
    "Tune_C_Q12",
    options=dict(pos_x="-0.06mm", pos_y="0", orientation=90, c_width="500um"),
)

gui.rebuild()
gui.autoscale()

[7]:

# Get a list of all the qcomponents in QDesign and then zoom on them.
all_component_names = design.components.keys()

gui.zoom_on_components(all_component_names)

[8]:

# Save screenshot as a .png formatted file.
gui.screenshot()

../../_images/circuit-examples_D.Qubit-couplers_31-TwoCrossmonsTunableCoupler_10_0.png

[9]:

# Screenshot the canvas only as a .png formatted file.
gui.figure.savefig("shot.png")

from IPython.display import Image, display

_disp_ops = dict(width=500)
display(Image("shot.png", **_disp_ops))

../../_images/circuit-examples_D.Qubit-couplers_31-TwoCrossmonsTunableCoupler_11_0.png

[10]:

# Closing the Qiskit Metal GUI
gui.main_window.close()

[10]:

True

[ ]:

For more information, review the Introduction to Quantum Computing and Quantum Hardware lectures below

Superconducting Qubits I: Quantizing a Harmonic Oscillator, Josephson Junctions Part 1	Lecture Video	Lecture Notes	Lab
Superconducting Qubits I: Quantizing a Harmonic Oscillator, Josephson Junctions Part 2	Lecture Video	Lecture Notes	Lab
Superconducting Qubits I: Quantizing a Harmonic Oscillator, Josephson Junctions Part 3	Lecture Video	Lecture Notes	Lab
Superconducting Qubits II: Circuit Quantum Electrodynamics, Readout and Calibration Methods Part 1	Lecture Video	Lecture Notes	Lab
Superconducting Qubits II: Circuit Quantum Electrodynamics, Readout and Calibration Methods Part 2	Lecture Video	Lecture Notes	Lab
Superconducting Qubits II: Circuit Quantum Electrodynamics, Readout and Calibration Methods Part 3	Lecture Video	Lecture Notes	Lab