kqcircuits.qubits.qubit

class kqcircuits.qubits.qubit.Qubit

Bases: kqcircuits.elements.element.Element

Base class for qubit objects without actual produce function.

Collection of shared sub routines for shared parameters and producing shared aspects of qubit geometry including

• possible fluxlines

• e-beam layers for SQUIDs

• SQUID name parameter

LIBRARY_NAME = 'Qubit Library'

LIBRARY_DESCRIPTION = 'Library for qubits.'

LIBRARY_PATH = 'qubits'

coerce_parameters_impl()

default implementation

produce_squid(transf, only_arms=False, **parameters)

Produces the squid.

Creates the squid cell and inserts it with the given transformation as a subcell. Also inserts the squid parts in “base_metal_gap_wo_grid”-layer to “base_metal_gap_for_EBL”-layer. It also returns a right_side refpoint, calculated from base_metal_gap_wo_grid layer’s bounding box to help with arm_length calculation in JunctionTestPads.

Parameters

• transf (DCplxTrans) – squid transformation

• parameters – other parameters for the squid

• only_arms – Boolean argument that allows to choose whether to create the arms and the squid device or only the arms

Returns

Relative refpoints for the squid

Return type

(dict)

produce_fluxline(**parameters)

Produces the fluxline.

Creates the fluxline cell and inserts it as a subcell. The “flux” and “flux_corner” ports are made available for the qubit.

Parameters

parameters – parameters for the fluxline to overwrite default and subclass parameters

PCell parameters:

• mirror_squid (Boolean) - Mirror SQUID by its Y axis, default=False

• junction_total_length (Double) - Simulation junction total length, default=33, unit=µm

• junction_type (String) - Junction Type, default=Manhattan, choices=['NoSquid', 'Manhattan', 'Manhattan Single Junction', 'Sim']

• junction_width (Double) - Junction width (only used for code generated element), default=0.02, unit=μm

• junction_parameters (String) - Extra Junction Parameters, default={}

• _junction_parameters (String) - Previous state of *_parameters, default={}

• loop_area (Double) - Loop area, default=100, unit=μm^2

• fluxline_type (String) - Fluxline Type, default=Fluxline Standard, choices=['none', 'Fluxline Standard', 'Fluxline Straight']

• fluxline_gap_width (Double) - Fluxline gap width, default=2, unit=μm

• fluxline_parameters (String) - Extra Fluxline Parameters, default={}

• _fluxline_parameters (String) - Previous state of *_parameters, default={}