def setup_class(cls):
cls.qbt = None
cls.qbt_type = ZeroPi
cls.file_str = 'zeropi'
cls.grid = scq.Grid1d(1, 2, 3)
cls.op1_str = 'n_theta_operator'
cls.op2_str = 'i_d_dphi_operator'
cls.param_name = 'flux'
cls.param_list = np.linspace(0, 0.5, 15)
def update_grid_qubit_params(self, **params):
grid_min, grid_max = params["grid"]
updated_grid = scq.Grid1d(
min_val=grid_min,
max_val=grid_max,
pt_count=self.grid_defaults["grid_pt_count"],
)
params.update({"grid": updated_grid})
self.qubit_current_params.update(params)
del params["grid"]
params["grid_min_val"] = grid_min
params["grid_max_val"] = grid_max
params["grid_pt_count"] = self.grid_defaults["grid_pt_count"]
self.active_qubit.set_params(**params)
def get_zero_pi_hamiltonian(flux):
phi_grid = scq.Grid1d(-6 * np.pi, 6 * np.pi, 200)
EJ_CONST = 1 / 3.95
zero_pi = scq.ZeroPi(grid=phi_grid,
EJ=EJ_CONST,
EL=10.0**(-2),
ECJ=1 / (8.0 * EJ_CONST),
EC=None,
ECS=10.0**(-3),
ng=0.1,
flux=flux,
ncut=30)
ham = zero_pi.hamiltonian()
return ham
def initialize_qubit(self, qubit_name: str) -> None:
"""Initializes self.active_qubit to the user's choice
using the chosen qubit's default parameters.
Parameters
----------
qubit_name:
"""
QubitClass = getattr(scq, qubit_name)
if self.qubit_change:
init_params = QubitClass.default_params()
if qubit_name == "ZeroPi" or qubit_name == "FullZeroPi":
init_params["grid"] = scq.Grid1d(
min_val=self.grid_defaults["grid_min_val"],
max_val=self.grid_defaults["grid_max_val"],
pt_count=self.grid_defaults["grid_pt_count"],
)
self.qubit_current_params = init_params
self.qubit_change = False
self.active_qubit = QubitClass(**self.qubit_current_params)
