Papers › ReQWIRE: Reasoning about Reversible Quantum Circuits
ReQWIRE: Reasoning about Reversible Quantum Circuits
Robert Rand, Jennifer Paykin, Dong-Ho Lee, Steve Zdancewic
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Common quantum algorithms make heavy use of ancillae: scratch qubits that are initialized at some state and later returned to that state and discarded. Existing quantum circuit languages let programmers assert that a qubit has been returned to the |0> state before it is discarded, allowing for a range of optimizations. However, existing languages do not provide the tools to verify these assertions, introducing a potential source of errors. In this paper we present methods for verifying that ancillae are discarded in the desired state, and use these methods to implement a verified compiler from classical functions to quantum oracles.
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