sf.backends.shared_ops.save_bs_factors

save_bs_factors(prefac, directory=None)

Saves precomputed beamsplitter factors in the Fock basis to a file.

This function reshapes the rank-5 array with dimension \(D\times D\times D\times D\times D\) to a rank-2 array of dimension \(D^4\times D\), before converting it to a sparse array, and saving it to a file in the specified directory.

Parameters

• prefac (numpy.array) – the Numpy array containing the precomputed beamsplitter prefactors in the Fock basis. Must be of size [D,D,D,D,D] for some integer D

• directory (str) – location to save the precomputed beamsplitter factors. By default, this will be the Strawberry Fields data directory.

code/api/strawberryfields.backends.shared_ops.save_bs_factors

 

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