Note

This page was generated from tut/2-From-components-to-chip/2.21-Design-a-4-qubit-full-chip.ipynb.

[1]:

import qiskit_metal as qm  # alias for qm.gui / qm.view

2.21 Design a 4 qubit full chip

💡 Using this tutorial without the Qt GUI

This tutorial uses the desktop MetalGUI. To follow along on Colab, Binder, JupyterHub, or any environment where Qt isn’t available, replace any ``gui.rebuild()`` / ``gui.screenshot()`` call with ``qm.view(design)`` — it renders the design to a matplotlib Figure you can display inline or save with fig.savefig(...).

See 1.1 Quick start for a complete runnable walkthrough and `docs/headless-usage.rst <../../docs/headless-usage.rst>`__ for the full reference.

Creates a complete quantum chip and exports it to GDS.

Preparations

Import key libraries and open the Metal GUI. Also, we configure the notebook to enable overwriting of existing components.

[2]:

import numpy as np
from collections import OrderedDict

from qiskit_metal import designs, draw
from qiskit_metal import Dict, Headings

design = designs.DesignPlanar()
gui = qm.gui(design)

# Dark theme for the desktop GUI screenshots below. Guarded because the
# inline headless viewer used on Colab/Binder has no stylesheet concept.
if hasattr(gui, "load_stylesheet"):
    gui.load_stylesheet("metal_dark")

# if you disable the next line, then you will need to delete a component [<component>.delete()] before recreating it
design.overwrite_enabled = True

11:26PM 17s WARNING [_qt_message_handler]: WARNING: Populating font family aliases took 162 ms. Replace uses of missing font family "Sans Serif" with one that exists to avoid this cost.  (No context available from Qt)
Python Traceback (most recent call last):
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/async_helpers.py", line 128, in _pseudo_sync_runner
    coro.send(None)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3400, in run_cell_async
    has_raised = await self.run_ast_nodes(code_ast.body, cell_name,
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3641, in run_ast_nodes
    if await self.run_code(code, result, async_=asy):
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3701, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "/var/folders/ll/v2l8gv4n6v59qrqlsc0jf3dc0000gn/T/ipykernel_40029/1732688812.py", line 8, in <module>
    gui = qm.gui(design)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/viewer/headless_gui.py", line 624, in gui
    return MetalGUI(design, **kwargs)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/main_window.py", line 570, in __init__
    super().__init__()
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/main_window_base.py", line 597, in __init__
    self.ui.setupUi(self.main_window)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/main_window_ui.py", line 51, in setupUi
    self.tabWidget.addTab(self.mainViewTab, icon1, "")
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/utility/_handle_qt_messages.py", line 81, in _qt_message_handler
    python_traceback = "".join(traceback.format_stack(limit=10))

11:26PM 17s WARNING [_qt_message_handler]: WARNING: This plugin does not support propagateSizeHints() (No context available from Qt)
Python Traceback (most recent call last):
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3178, in _run_cell
    result = runner(coro)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/async_helpers.py", line 128, in _pseudo_sync_runner
    coro.send(None)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3400, in run_cell_async
    has_raised = await self.run_ast_nodes(code_ast.body, cell_name,
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3641, in run_ast_nodes
    if await self.run_code(code, result, async_=asy):
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3701, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "/var/folders/ll/v2l8gv4n6v59qrqlsc0jf3dc0000gn/T/ipykernel_40029/1732688812.py", line 8, in <module>
    gui = qm.gui(design)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/viewer/headless_gui.py", line 624, in gui
    return MetalGUI(design, **kwargs)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/main_window.py", line 582, in __init__
    self.variables_window = PropertyTableWidget(self, gui=self)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/widgets/variable_table/prop_val_table_gui.py", line 51, in __init__
    self.show()
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/utility/_handle_qt_messages.py", line 81, in _qt_message_handler
    python_traceback = "".join(traceback.format_stack(limit=10))

11:26PM 17s WARNING [_qt_message_handler]: WARNING: This plugin does not support propagateSizeHints() (No context available from Qt)
Python Traceback (most recent call last):
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3123, in run_cell
    result = self._run_cell(
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3178, in _run_cell
    result = runner(coro)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/async_helpers.py", line 128, in _pseudo_sync_runner
    coro.send(None)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3400, in run_cell_async
    has_raised = await self.run_ast_nodes(code_ast.body, cell_name,
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3641, in run_ast_nodes
    if await self.run_code(code, result, async_=asy):
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3701, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "/var/folders/ll/v2l8gv4n6v59qrqlsc0jf3dc0000gn/T/ipykernel_40029/1732688812.py", line 8, in <module>
    gui = qm.gui(design)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/viewer/headless_gui.py", line 624, in gui
    return MetalGUI(design, **kwargs)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/main_window.py", line 627, in __init__
    self.main_window.show()
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/utility/_handle_qt_messages.py", line 81, in _qt_message_handler
    python_traceback = "".join(traceback.format_stack(limit=10))

Import components that will be necessary for the design.

[3]:

from qiskit_metal.qlibrary.qubits.transmon_pocket_cl import TransmonPocketCL
from qiskit_metal.qlibrary.tlines.meandered import RouteMeander
from qiskit_metal.qlibrary.tlines.anchored_path import RouteAnchors
from qiskit_metal.qlibrary.tlines.pathfinder import RoutePathfinder
from qiskit_metal.qlibrary.terminations.launchpad_wb import LaunchpadWirebond
from qiskit_metal.qlibrary.terminations.launchpad_wb_coupled import (
    LaunchpadWirebondCoupled,
)

Let’s design the core of the chip

Setup the design-wide default settings for trace width and trace gap. These can be customized later for individual transmission lines.

[4]:

design.variables["cpw_width"] = "10 um"
design.variables["cpw_gap"] = "6 um"
design._chips["main"]["size"]["size_x"] = "9mm"
design._chips["main"]["size"]["size_y"] = "6.5mm"

We need 4 transmons with 3 connection pads each and a chargeline. Let’s explore the options of one transmon

[5]:

TransmonPocketCL.get_template_options(design)

[5]:

{'pos_x': '0.0um',
 'pos_y': '0.0um',
 'orientation': '0.0',
 'chip': 'main',
 'layer': '1',
 'connection_pads': {},
 '_default_connection_pads': {'pad_gap': '15um',
  'pad_width': '125um',
  'pad_height': '30um',
  'pad_cpw_shift': '5um',
  'pad_cpw_extent': '25um',
  'cpw_width': 'cpw_width',
  'cpw_gap': 'cpw_gap',
  'cpw_extend': '100um',
  'pocket_extent': '5um',
  'pocket_rise': '65um',
  'loc_W': '+1',
  'loc_H': '+1'},
 'pad_gap': '30um',
 'inductor_width': '20um',
 'pad_width': '455um',
 'pad_height': '90um',
 'pocket_width': '650um',
 'pocket_height': '650um',
 'make_CL': True,
 'cl_gap': '6um',
 'cl_width': '10um',
 'cl_length': '20um',
 'cl_ground_gap': '6um',
 'cl_pocket_edge': '0',
 'cl_off_center': '50um',
 'hfss_wire_bonds': False,
 'q3d_wire_bonds': False,
 'aedt_q3d_wire_bonds': False,
 'aedt_hfss_wire_bonds': False,
 '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',
 'aedt_q3d_inductance': 1e-08,
 'aedt_q3d_capacitance': 0,
 'aedt_hfss_inductance': 1e-08,
 'aedt_hfss_capacitance': 0}

We want to change the pad_width for these transmons, as well as define the 3 connection pads and chargeline.

To apply the same modifications to all 4 transmons, we define a single option-dictionary to pass to all transmons at the monent of creation.

[6]:

transmon_options = dict(
    connection_pads=dict(
        a=dict(loc_W=+1, loc_H=-1, pad_width="70um", cpw_extend="50um"),
        b=dict(loc_W=-1, loc_H=-1, pad_width="125um", cpw_extend="50um"),
        c=dict(loc_W=-1, loc_H=+1, pad_width="110um", cpw_extend="50um"),
    ),
    gds_cell_name="FakeJunction_01",
    cl_off_center="-50um",
    cl_pocket_edge="180",
)

We can now create the 4 transmons by specifying the desired coordinates and orientations.

[7]:

offset_tm = 69  # we the transmon slightly out of center-line

q1 = TransmonPocketCL(
    design,
    "Q1",
    options=dict(pos_x="+2420um", pos_y=f"{offset_tm}um", **transmon_options),
)
q2 = TransmonPocketCL(
    design,
    "Q2",
    options=dict(pos_x="0um", pos_y="-857.6um", orientation="270", **transmon_options),
)
q3 = TransmonPocketCL(
    design,
    "Q3",
    options=dict(
        pos_x="-2420um", pos_y=f"{offset_tm}um", orientation="180", **transmon_options
    ),
)
q4 = TransmonPocketCL(
    design,
    "Q4",
    options=dict(pos_x="0um", pos_y="+857.6um", orientation="90", **transmon_options),
)

gui.rebuild()
gui.autoscale()

[8]:

gui.screenshot()
../../_images/tut_2-From-components-to-chip_2.21-Design-a-4-qubit-full-chip_18_0.png

Let’s now connect the transmons with transmission lines. We want to have an “exact length” transmission line, so we will use the RouteMeander. Let’s first observe what the default options are.

[9]:

RouteMeander.get_template_options(design)

[9]:

{'chip': 'main',
 'layer': '1',
 'pin_inputs': {'start_pin': {'component': '', 'pin': ''},
  'end_pin': {'component': '', 'pin': ''}},
 'fillet': '0',
 'lead': {'start_straight': '0mm',
  'end_straight': '0mm',
  'start_jogged_extension': '',
  'end_jogged_extension': ''},
 'total_length': '7mm',
 'trace_width': 'cpw_width',
 'meander': {'spacing': '200um', 'asymmetry': '0um'},
 'snap': 'true',
 'prevent_short_edges': 'true',
 'hfss_wire_bonds': False,
 'q3d_wire_bonds': False,
 'aedt_q3d_wire_bonds': False,
 'aedt_hfss_wire_bonds': False}

We want to globally override the default lead (straight initial segment leaving the transmon) and the default fillet (corner rounding radius). Let’s collect this information in one dictionary.

[10]:

fillet = "99.99um"
cpw_options = Dict(
    lead=Dict(start_straight="100um", end_straight="250um"), fillet=fillet
)

We then want each transmission line to be connected to different pins and to have different lengths and asymmetry w.r.t their centerline. Let’s collect this information in other dictionaries. Before doing that, to manage the dictionaries in a simpler way, we redefine the RouteMeander signature by wrapping it into a convenient method named connect

[11]:

def connect(
    cpw_name: str,
    pin1_comp_name: str,
    pin1_comp_pin: str,
    pin2_comp_name: str,
    pin2_comp_pin: str,
    length: str,
    asymmetry="0 um",
):
    """Connect two pins with a CPW."""
    myoptions = Dict(
        pin_inputs=Dict(
            start_pin=Dict(component=pin1_comp_name, pin=pin1_comp_pin),
            end_pin=Dict(component=pin2_comp_name, pin=pin2_comp_pin),
        ),
        total_length=length,
    )
    myoptions.update(cpw_options)
    myoptions.meander.asymmetry = asymmetry
    return RouteMeander(design, cpw_name, myoptions)

We can now proceed and define the meanders following the signature: connect(cpw_name, pin1_comp_name, pin1_comp_pin, pin2_comp_name, pin2_comp_pin, length, asymmetry)

[12]:

asym = 500
cpw1 = connect("cpw1", "Q1", "c", "Q4", "b", "9000um", f"-{asym - 1.25 * offset_tm}um")
cpw2 = connect("cpw2", "Q3", "b", "Q4", "c", "9000um", f"+{asym - 1.25 * offset_tm}um")
cpw3 = connect("cpw3", "Q3", "c", "Q2", "b", "9000um", f"-{asym + 0.75 * offset_tm}um")
cpw4 = connect("cpw4", "Q1", "b", "Q2", "c", "9000um", f"+{asym + 0.75 * offset_tm}um")

gui.rebuild()
gui.autoscale()

Let’s now connect the core elements to the launchpads

First we setup the launchpad location and orientation.

[13]:

# V1 - Corners
p1_c = LaunchpadWirebond(
    design,
    "P1_C",
    options=dict(pos_x="3545um", pos_y="2812um", orientation="270", lead_length="0um"),
)
p2_c = LaunchpadWirebond(
    design,
    "P2_C",
    options=dict(pos_x="3545um", pos_y="-2812um", orientation="90", lead_length="0um"),
)
p3_c = LaunchpadWirebond(
    design,
    "P3_C",
    options=dict(pos_x="-3545um", pos_y="-2812um", orientation="90", lead_length="0um"),
)
p4_c = LaunchpadWirebond(
    design,
    "P4_C",
    options=dict(pos_x="-3545um", pos_y="2812um", orientation="270", lead_length="0um"),
)

# V2
p1_q = LaunchpadWirebondCoupled(
    design,
    "P1_Q",
    options=dict(pos_x="4020um", pos_y="0", orientation="180", lead_length="30um"),
)
p2_q = LaunchpadWirebondCoupled(
    design,
    "P2_Q",
    options=dict(pos_x="-990um", pos_y="-2812um", orientation="90", lead_length="30um"),
)
p3_q = LaunchpadWirebondCoupled(
    design,
    "P3_Q",
    options=dict(pos_x="-4020um", pos_y="0", orientation="0", lead_length="30um"),
)
p4_q = LaunchpadWirebondCoupled(
    design,
    "P4_Q",
    options=dict(pos_x="990um", pos_y="2812um", orientation="270", lead_length="30um"),
)

gui.rebuild()
gui.autoscale()

11:26PM 18s WARNING [_qt_message_handler]: WARNING: This plugin does not support propagateSizeHints() (No context available from Qt)
Python Traceback (most recent call last):
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3400, in run_cell_async
    has_raised = await self.run_ast_nodes(code_ast.body, cell_name,
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3641, in run_ast_nodes
    if await self.run_code(code, result, async_=asy):
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3701, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "/var/folders/ll/v2l8gv4n6v59qrqlsc0jf3dc0000gn/T/ipykernel_40029/2304210001.py", line 46, in <module>
    gui.autoscale()
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/main_window.py", line 1443, in autoscale
    self.plot_win.auto_scale(include_chip=include_chip)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/widgets/plot_widget/plot_window.py", line 248, in auto_scale
    self.canvas.auto_scale(include_chip=include_chip)
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/renderers/renderer_mpl/mpl_canvas.py", line 833, in auto_scale
    self.refresh()
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/renderers/renderer_mpl/mpl_canvas.py", line 558, in refresh
    self.flush_events()
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/.venv/lib/python3.11/site-packages/matplotlib/backends/backend_qt.py", line 466, in flush_events
    QtWidgets.QApplication.instance().processEvents()
  File "/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/src/qiskit_metal/_gui/utility/_handle_qt_messages.py", line 81, in _qt_message_handler
    python_traceback = "".join(traceback.format_stack(limit=10))


[14]:

gui.screenshot()
../../_images/tut_2-From-components-to-chip_2.21-Design-a-4-qubit-full-chip_30_0.png

Then we route. First the V2 launchpads - Exchange Coupler Lines to Edges.

[15]:

asym = 150
cpw_options = Dict(lead=Dict(start_straight="430um", end_straight="0um"), fillet=fillet)
ol1 = connect("ol1", "Q1", "a", "P1_Q", "tie", "8.6 mm", f"+{asym}um")
ol3 = connect("ol3", "Q3", "a", "P3_Q", "tie", "8.6 mm", f"+{asym}um")

asym = 200
cpw_options = Dict(lead=Dict(start_straight="535um", end_straight="0um"), fillet=fillet)
ol2 = connect("ol2", "Q2", "a", "P2_Q", "tie", "8.6 mm", f"+{asym}um")
ol4 = connect("ol4", "Q4", "a", "P4_Q", "tie", "8.6 mm", f"+{asym}um")

gui.rebuild()
gui.autoscale()

Finally we route the V1 launchpads - Chargelines to Corners.

We create the transmission lines between the corner launchpads and the qubit charge lines.

[16]:

from collections import OrderedDict

jogsA_in = OrderedDict()
jogsA_in[0] = ["L", "200um"]

options_line_cl1 = {
    "pin_inputs": {
        "start_pin": {"component": "Q1", "pin": "Charge_Line"},
        "end_pin": {"component": "P1_C", "pin": "tie"},
    },
    "lead": {
        "start_straight": "120um",
        "end_straight": "225um",
        "start_jogged_extension": jogsA_in,
    },
    "fillet": fillet,
}
cl1 = RouteAnchors(design, "line_cl1", options_line_cl1)

options_line_cl3 = {
    "pin_inputs": {
        "start_pin": {"component": "Q3", "pin": "Charge_Line"},
        "end_pin": {"component": "P3_C", "pin": "tie"},
    },
    "lead": {
        "start_straight": "120um",
        "end_straight": "225um",
        "start_jogged_extension": jogsA_in,
    },
    "fillet": fillet,
}
cl3 = RouteAnchors(design, "line_cl3", options_line_cl3)

gui.rebuild()
gui.autoscale()

[17]:

jogsB_in = OrderedDict()
jogsB_in[0] = ["L", "300um"]

anchors2c = OrderedDict()
anchors2c[0] = np.array([2, -2.5])

options_line_cl2 = {
    "pin_inputs": {
        "start_pin": {"component": "Q2", "pin": "Charge_Line"},
        "end_pin": {"component": "P2_C", "pin": "tie"},
    },
    "lead": {
        "start_straight": "200um",
        "end_straight": "225um",
        "start_jogged_extension": jogsB_in,
    },
    "anchors": anchors2c,
    "fillet": fillet,
}

cl2 = RouteAnchors(design, "line_cl2", options_line_cl2)

anchors4c = OrderedDict()
anchors4c[0] = np.array([-2, 2.5])

options_line_cl4 = {
    "pin_inputs": {
        "start_pin": {"component": "Q4", "pin": "Charge_Line"},
        "end_pin": {"component": "P4_C", "pin": "tie"},
    },
    "lead": {
        "start_straight": "200um",
        "end_straight": "225um",
        "start_jogged_extension": jogsB_in,
    },
    "anchors": anchors4c,
    "fillet": fillet,
}

cl4 = RouteAnchors(design, "line_cl4", options_line_cl4)

gui.rebuild()
gui.autoscale()

[18]:

gui.screenshot()
../../_images/tut_2-From-components-to-chip_2.21-Design-a-4-qubit-full-chip_37_0.png

Export to GDS

QDesign enables GDS renderer during init. Let’s see what the available option defaults are.

[19]:

a_gds = design.renderers.gds

a_gds.options

[19]:

{'short_segments_to_not_fillet': 'True',
 'check_short_segments_by_scaling_fillet': '2.0',
 'gds_unit': 0.001,
 'ground_plane': 'True',
 'negative_mask': {'main': []},
 'fabricate': 'False',
 'corners': 'natural',
 'tolerance': '0.00001',
 'precision': '0.000000001',
 'width_LineString': '10um',
 'path_filename': '../resources/Fake_Junctions.GDS',
 'junction_pad_overlap': '5um',
 'max_points': '199',
 'cheese': {'datatype': '100',
  'shape': '0',
  'cheese_0_x': '25um',
  'cheese_0_y': '25um',
  'cheese_1_radius': '100um',
  'view_in_file': {'main': {1: True}},
  'delta_x': '100um',
  'delta_y': '100um',
  'edge_nocheese': '200um'},
 'no_cheese': {'datatype': '99',
  'buffer': '25um',
  'cap_style': '2',
  'join_style': '2',
  'view_in_file': {'main': {1: True}}},
 'bounding_box_scale_x': '1.2',
 'bounding_box_scale_y': '1.2'}

[20]:

a_gds.options["no_cheese"]["buffer"] = "50um"

Correct the path to point to the junction GDS that we intend to include in the output GDS. Then stream out all components in the design.

[21]:

a_gds.options["path_filename"] = "../../resources/Fake_Junctions.GDS"
a_gds.export_to_gds("Full_chip_design.gds")

11:26PM 20s WARNING [import_junction_gds_file]: Not able to find file:"../../resources/Fake_Junctions.GDS".  Not used to replace junction. Checked directory:"/Users/zlatkominev/CODE_REPOS/quantum_hardware_all/qiskit-metal/docs/resources".

[21]:

1

TODO: Add load GDS and preview here.

[22]:

# gui.main_window.close()


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