# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
#
# This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with this program. If not, see
# https://www.gnu.org/licenses/gpl-3.0.html.
#
# The software distribution should follow IQM trademark policy for open-source software
# (meetiqm.com/iqm-open-source-trademark-policy). IQM welcomes contributions to the code.
# Please see our contribution agreements for individuals (meetiqm.com/iqm-individual-contributor-license-agreement)
# and organizations (meetiqm.com/iqm-organization-contributor-license-agreement).
from kqcircuits.pya_resolver import pya
from kqcircuits.util.parameters import Param, pdt
from kqcircuits.elements.element import Element
from kqcircuits.defaults import default_fluxline_type
from kqcircuits.elements.fluxlines import fluxline_type_choices
[docs]
class Fluxline(Element):
"""Base class for fluxline objects without actual produce function."""
default_type = default_fluxline_type
fluxline_type = Param(pdt.TypeString, "Fluxline Type", default_type, choices=fluxline_type_choices)
fluxline_width = Param(pdt.TypeDouble, "Fluxline width", 18, unit="μm")
fluxline_gap_width = Param(pdt.TypeDouble, "Fluxline gap width", 2, unit="μm")
fluxline_parameters = Param(pdt.TypeString, "Extra Fluxline Parameters", "{}")
_fluxline_parameters = Param(pdt.TypeString, "Previous state of *_parameters", "{}", hidden=True)
[docs]
@classmethod
def create(cls, layout, library=None, fluxline_type=None, **parameters):
"""Create a Fluxline cell in layout."""
return cls.create_subtype(layout, library, fluxline_type, **parameters)[0]
[docs]
def coerce_parameters_impl(self):
self.sync_parameters(Fluxline)
def _insert_fluxline_shapes(self, left_gap, right_gap):
"""Inserts the gap shapes to the cell.
Protection layer is added based on their bounding box.
Arg:
left_gap (DPolygon): polygon for the left gap
right_gap (DPolygon): polygon for the right gap
"""
# transfer to qubit coordinates
self.cell.shapes(self.get_layer("base_metal_gap_wo_grid")).insert(left_gap)
self.cell.shapes(self.get_layer("base_metal_gap_wo_grid")).insert(right_gap)
# protection
protection = (
pya.Region([p.to_itype(self.layout.dbu) for p in [right_gap, left_gap]])
.bbox()
.enlarged(self.margin / self.layout.dbu, self.margin / self.layout.dbu)
)
self.add_protection(pya.Polygon(protection))
def _add_fluxline_refpoints(self, port_ref):
"""Adds refpoints for "port_flux" and "port_flux_corner".
Arg:
port_ref (DPoint): position of "port_flux" in fluxline coordinates
"""
self.refpoints["origin_fluxline"] = pya.DPoint(0, 0)
self.add_port("flux", port_ref, pya.DVector(0, -1))