quri_parts.itensor.sampler module#

create_itensor_mps_sampler(*, maxdim=None, cutoff=None, **kwargs)#

Returns a Sampler that uses ITensor mps simulator for sampling.

The following parameters including keyword arguments **kwargs are passed to ITensors.apply

Parameters:

  • maxdim (int | None) – The maximum number of singular values.

  • cutoff (float | None) – Singular value truncation cutoff.

  • kwargs (Any) –

Return type:

core.sampling.Sampler

create_itensor_mps_concurrent_sampler(executor=None, concurrency=1, *, maxdim=None, cutoff=None, **kwargs)#

Returns a ConcurrentSampler that uses ITensor mps simulator for sampling.

The following parameters including keyword arguments **kwargs are passed to ITensors.apply

Parameters:

  • maxdim (Optional[int]) – The maximum number of singular values.

  • cutoff (Optional[float]) – Singular value truncation cutoff.

  • executor (Optional['Executor']) –

  • concurrency (int) –

  • kwargs (Any) –

Return type:

ConcurrentSampler

For now, this function works when the executor is defined like below

Examples

>>> with ProcessPoolExecutor(
        max_workers=2, mp_context=get_context("spawn")
    ) as executor:
        sampler = create_itensor_mps_concurrent_sampler(
            executor, 2, **kwargs
        )
        results = list(sampler([(circuit1, 1000), (circuit2, 2000)]))