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A Quantum Interpretation of Bunched Logic for Quantum Separation Logic

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arxiv 2102.00329 v1 pith:IC4KZHJ5 submitted 2021-01-30 cs.LO quant-ph

A Quantum Interpretation of Bunched Logic for Quantum Separation Logic

classification cs.LO quant-ph
keywords logicquantumprogramstatesbunchedmodelseparationalgorithm
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose a model of the substructural logic of Bunched Implications (BI) that is suitable for reasoning about quantum states. In our model, the separating conjunction of BI describes separable quantum states. We develop a program logic where pre- and post-conditions are BI formulas describing quantum states -- the program logic can be seen as a counterpart of separation logic for imperative quantum programs. We exercise the logic for proving the security of quantum one-time pad and secret sharing, and we show how the program logic can be used to discover a flaw in Google Cirq's tutorial on the Variational Quantum Algorithm (VQA).

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