Source code for kqcircuits.chips.demo_twoface

# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
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from kqcircuits.chips.chip import Chip
from kqcircuits.elements.finger_capacitor_square import FingerCapacitorSquare
from kqcircuits.elements.finger_capacitor_taper import FingerCapacitorTaper
from kqcircuits.elements.meander import Meander
from kqcircuits.junctions.junction import Junction
from kqcircuits.qubits.swissmon import Swissmon
from kqcircuits.elements.waveguide_composite import WaveguideComposite, Node
from kqcircuits.elements.waveguide_coplanar_splitter import WaveguideCoplanarSplitter, t_cross_parameters
from kqcircuits.pya_resolver import pya
from kqcircuits.util.geometry_helper import point_shift_along_vector
from kqcircuits.util.parameters import Param, pdt, add_parameters_from
from kqcircuits.chips.demo import Demo


[docs]@add_parameters_from(Demo, "readout_res_lengths", "include_couplers", frames_enabled=[0, 1]) @add_parameters_from(Junction, "junction_type") class DemoTwoface(Chip): """Demonstration chip for 3D-integration (multi-face) features.""" name_chip = Param(pdt.TypeString, "Name of the chip", "DT")
[docs] def build(self): launcher_assignments = { # N 2: "FL-QB1", 3: "PL-1-IN", 4: "PL-2-IN", 5: "FL-QB2", # E 7: "DL-QB2", 12: "DL-QB4", # S 14: "FL-QB4", 15: "PL-2-OUT", 16: "PL-1-OUT", 17: "FL-QB3", # W 19: "DL-QB3", 24: "DL-QB1", } self.produce_launchers("ARD24", launcher_assignments) self.produce_qubits() if self.include_couplers: self.produce_couplers() self.produce_control_lines() self.produce_readout_structures() self.produce_probelines()
[docs] def produce_qubits(self): dist_x = 2000 # distance from bottom chip edge dist_y = 3200 self.produce_qubit(pya.DTrans(0, True, dist_x, 1e4 - dist_y), "QB1") self.produce_qubit(pya.DTrans(2, False, 1e4 - dist_x, 1e4 - dist_y), "QB2") self.produce_qubit(pya.DTrans(0, False, dist_x, dist_y), "QB3") self.produce_qubit(pya.DTrans(2, True, 1e4 - dist_x, dist_y), "QB4")
[docs] def produce_qubit(self, trans, inst_name): self.insert_cell( Swissmon, trans, inst_name, cpl_length=[120, 120, 120], port_width=[4, 10, 4], )
[docs] def produce_couplers(self): self.produce_coupler(1, 2) self.produce_coupler(4, 3)
[docs] def produce_coupler(self, qubit_a_nr, qubit_b_nr): self.insert_cell( WaveguideComposite, nodes=[ Node(self.refpoints["QB{}_port_cplr2".format(qubit_a_nr)]), Node(self.refpoints["QB{}_port_cplr2".format(qubit_b_nr)]), ], a=4, b=9, )
[docs] def produce_control_lines(self): for qubit_nr in [1, 2, 3, 4]: self.produce_driveline(qubit_nr) self.produce_fluxline(qubit_nr)
[docs] def produce_driveline(self, qubit_nr): port_drive = self.refpoints["QB{}_port_drive".format(qubit_nr)] port_corner = self.refpoints["DL-QB{}_port_corner".format(qubit_nr)] self.insert_cell( WaveguideComposite, nodes=[ Node(self.refpoints["DL-QB{}_base".format(qubit_nr)]), Node(port_corner), Node(port_drive), ], term2=self.b, )
[docs] def produce_fluxline(self, qubit_nr): port_corner = self.refpoints["FL-QB{}_port_corner".format(qubit_nr)] port_flux = self.refpoints["QB{}_port_flux".format(qubit_nr)] shift = 1500 if qubit_nr in [3, 4] else -1500 self.insert_cell( WaveguideComposite, nodes=[ Node(self.refpoints["FL-QB{}_base".format(qubit_nr)]), Node(port_corner + pya.DPoint(0, shift)), Node((port_flux.x, port_corner.y + shift)), Node(self.refpoints["QB{}_port_flux".format(qubit_nr)]), ], )
[docs] def produce_readout_structures(self): self.produce_readout_structure(1, False, 7) self.produce_readout_structure(2, True, 6) self.produce_readout_structure(3, False, 5) self.produce_readout_structure(4, True, 4)
[docs] def produce_readout_structure(self, qubit_nr, mirrored, cap_finger_nr): # non-meandering part of the resonator point_1 = self.refpoints["QB{}_port_cplr1".format(qubit_nr)] point_2 = point_shift_along_vector( self.refpoints["QB{}_port_cplr1".format(qubit_nr)], self.refpoints["QB{}_base".format(qubit_nr)], -700 ) point_3 = point_2 + pya.DPoint(-400 if mirrored else 400, 0) point_4 = point_3 + pya.DPoint(-100 if mirrored else 100, 0) waveguide_inst, _ = self.insert_cell( WaveguideComposite, nodes=[ Node(point_1), Node(point_2), Node(point_3, face_id=self.face_ids[1]), Node(point_4), ], ) length_nonmeander = waveguide_inst.cell.length() # meandering part of the resonator meander_start = point_4 meander_end = point_4 + pya.DPoint(-1300 if mirrored else 1300, 0) self.insert_cell( Meander, start=meander_start, end=meander_end, length=float(self.readout_res_lengths[qubit_nr - 1]) - length_nonmeander, meanders=5, face_ids=[self.face_ids[1]], ) # capacitor and tcross waveguide connecting resonator to probeline if mirrored: cap_rot = 2 tcross_rot = 1 else: cap_rot = 0 tcross_rot = 3 cap_cell = self.add_element(FingerCapacitorSquare, finger_number=cap_finger_nr, face_ids=[self.face_ids[1]]) cap_ref_rel = self.get_refpoints(cap_cell, pya.DTrans(cap_rot, False, 0, 0)) cap_trans = pya.DTrans(cap_rot, False, meander_end + cap_ref_rel["base"] - cap_ref_rel["port_a"]) _, cap_ref_abs = self.insert_cell(cap_cell, cap_trans) tcross_cell = self.add_element( WaveguideCoplanarSplitter, **t_cross_parameters( a=self.a, b=self.b, a2=self.a, b2=self.b, length_extra_side=30, face_ids=[self.face_ids[1]] ), ) tcross_ref_rel = self.get_refpoints(tcross_cell, pya.DTrans(tcross_rot, False, 0, 0)) tcross_trans = pya.DTrans(tcross_rot, False, cap_ref_abs["port_b"] - tcross_ref_rel["port_bottom"]) self.insert_cell(tcross_cell, tcross_trans, inst_name="PL{}".format(qubit_nr), label_trans=pya.DCplxTrans(0.2))
[docs] def produce_probelines(self): self.produce_probeline("PL-1", 1, 3, True, 4) self.produce_probeline("PL-2", 2, 4, False, 6)
[docs] def produce_probeline(self, probeline_name, qubit_a_nr, qubit_b_nr, mirrored, cap_finger_nr): cap_cell = self.add_element( FingerCapacitorTaper, finger_number=cap_finger_nr, taper_length=20, face_ids=[self.face_ids[1]] ) cap_trans = pya.DTrans(3, False, self.refpoints["PL{}_port_left".format(qubit_a_nr)] + pya.DPoint(0, 700)) _, cap_ref_abs = self.insert_cell(cap_cell, cap_trans) # segment 1 self.insert_cell( WaveguideComposite, nodes=[ Node(self.refpoints["{}-IN_base".format(probeline_name)]), Node(self.refpoints["{}-IN_port_corner".format(probeline_name)] + pya.DPoint(0, -1000)), Node( ( self.refpoints["PL{}_port_left".format(qubit_a_nr)].x, self.refpoints["{}-IN_port_corner".format(probeline_name)].y - 1000, ) ), Node(cap_ref_abs["port_a"] + pya.DPoint(0, 700), face_id=self.face_ids[1]), Node(cap_ref_abs["port_a"]), ], ) port_1_side = "left" if mirrored else "right" port_2_side = "right" if mirrored else "left" # segment 2 self.insert_cell( WaveguideComposite, nodes=[ Node(cap_ref_abs["port_b"]), Node(self.refpoints["PL{}_port_{}".format(qubit_a_nr, port_1_side)]), ], face_ids=[self.face_ids[1]], ) # segment 3 self.insert_cell( WaveguideComposite, nodes=[ Node(self.refpoints["PL{}_port_{}".format(qubit_a_nr, port_2_side)]), Node(self.refpoints["PL{}_port_{}".format(qubit_b_nr, port_1_side)]), ], face_ids=[self.face_ids[1]], ) # segment 4 self.insert_cell( WaveguideComposite, nodes=[ Node(self.refpoints["{}-OUT_base".format(probeline_name)]), Node(self.refpoints["{}-OUT_port_corner".format(probeline_name)] + pya.DPoint(0, 1000)), Node( ( self.refpoints["PL{}_port_right".format(qubit_b_nr)].x, self.refpoints["{}-OUT_port_corner".format(probeline_name)].y + 1000, ) ), Node( self.refpoints["PL{}_port_right".format(qubit_b_nr)] + pya.DPoint(0, -1400), face_id=self.face_ids[1], ), Node(self.refpoints["PL{}_port_{}".format(qubit_b_nr, port_2_side)]), ], )