get_ccz2t_costs#

Generate spacetime cost and failure probability given physical and logical parameters.

qualtran.surface_code.get_ccz2t_costs(
    *,
    n_logical_gates: 'GateCounts',
    n_algo_qubits: int,
    phys_err: float,
    cycle_time_us: float,
    factory: qualtran.surface_code.MagicStateFactory,
    data_block: qualtran.surface_code.DataBlock
) -> qualtran.surface_code.PhysicalCostsSummary

Note that this function can return failure probabilities larger than 1.

This function exists for backwards-compatibility. Consider constructing a PhysicalCostModel directly.

Args

n_logical_gates

The number of algorithm logical gates.

n_algo_qubits

Number of algorithm logical qubits.

phys_err

The physical error rate of the device.

cycle_time_us

The number of microseconds it takes to execute a surface code cycle.

factory

magic state factory configuration. Used to evaluate distillation error and cost.

data_block

data block configuration. Used to evaluate data error and footprint.

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