QECGatesCost

qualtran.resource_counting.QECGatesCost

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Counts specifically for ‘expensive’ gates in a surface code error correction scheme.

Inherits From: CostKey

qualtran.resource_counting.QECGatesCost(
    *, legacy_shims=attr_dict['legacy_shims'].default
)

The cost value type for this CostKey is GateCounts.

Args

legacy_shims

If enabled, modify the counting logic to match the peculiarities of the legacy t_complexity protocol.

Attributes

legacy_shims

 

Methods

compute

View source

compute(
    bloq: 'Bloq', get_callee_cost: Callable[['Bloq'], GateCounts]
) -> qualtran.resource_counting.GateCounts

Compute this type of cost.

When implementing a new CostKey, this method must be overridden. Users should not call this method directly. Instead: use the qualtran.resource_counting functions like get_cost_value, get_cost_cache, or query_costs. These provide caching, logging, generalizers, and support for static costs.

For recursive computations, use the provided callable to recurse.

Args

bloq

The bloq to compute the cost of.

get_callee_cost

A qualtran-provided function for computing costs for “callees” of the bloq; i.e. bloqs in the decomposition. Use this function to accurately cache intermediate cost values and respect bloqs’ static costs.

Returns

zero

View source

zero() -> qualtran.resource_counting.GateCounts

The value corresponding to zero cost.

validate_val

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validate_val(
    val: qualtran.resource_counting.GateCounts
)

Assert that val is a valid CostValT.

This method can be optionally overridden to raise an error if an invalid value is encountered. By default, no validation is performed.

__ne__

__ne__(
    other
)

Check equality and either forward a NotImplemented or return the result negated.

__eq__

__eq__(
    other
)

Method generated by attrs for class QECGatesCost.