def __init__(self, decay_prob: float):
"""A depolarizing noise model with damped readout error.
Args:
decay_prob: Probability of T1 decay during measurement.
"""
value.validate_probability(decay_prob, 'decay_prob')
self.readout_decay_gate = ops.AmplitudeDampingChannel(decay_prob)
def __init__(self, decay_prob: float, prepend: bool = True):
"""A depolarizing noise model with damped readout error.
Args:
decay_prob: Probability of T1 decay during measurement.
prepend: If True, put noise before affected gates. Default: True.
"""
value.validate_probability(decay_prob, 'decay_prob')
self.readout_decay_gate = ops.AmplitudeDampingChannel(decay_prob)
self._prepend = prepend
def __init__(self, depol_prob: float, bitflip_prob: float,
decay_prob: float):
"""A depolarizing noise model with damped readout error.
Args:
depol_prob: Depolarizing probability.
bitflip_prob: Probability of a bit-flip during measurement.
decay_prob: Probability of T1 decay during measurement.
Bitflip noise is applied first, then amplitude decay.
"""
value.validate_probability(depol_prob, 'depol prob')
value.validate_probability(bitflip_prob, 'bitflip prob')
value.validate_probability(decay_prob, 'decay_prob')
self.qubit_noise_gate = ops.DepolarizingChannel(depol_prob)
self.readout_noise_gate = ops.BitFlipChannel(bitflip_prob)
self.readout_decay_gate = ops.AmplitudeDampingChannel(decay_prob)