Add `ChainComplex` object, and `ChainComplex.tensor_product`

Infleqtion / qLDPC

Tools for constructing and analyzing quantum low density parity check (qLDPC) codes.

Apache License 2.0

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Add `ChainComplex` object, and `ChainComplex.tensor_product` #43

Closed perlinm closed 5 months ago

perlinm commented 5 months ago

Also test and ensure equivalency between chain-based, matrix-based, and graph-based HGPCode constructions. This required changing a sign convention in HGPCode and LPCode.

Makes progress towards #33