Quantum computations must be reversible to preserve the unitarity of quantum mechanical evolution.

the verdict

COMMON KNOWLEDGE

Legacy classification; evidence review pending

Recorded sources

1 source for · 0 against

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Is it true that quantum computations must be reversible to preserve the unitarity of quantum mechanical evolution?

Quantum computations are fundamentally tied to reversible transformations because the standard evolution of closed quantum systems is governed by unitary operators, which require reversibility to preserve probability and state norms.

Verdict: COMMON KNOWLEDGE · 1 source for, 0 against · Last checked 6 Aug 2026

The analysis

The claim is a foundational definition in quantum mechanics and quantum computing: quantum mechanical evolution is unitary, and unitary operators are by definition invertible (reversible). Paper [2] directly affirms that closed quantum systems obey unitary evolution and are reversible. Because this is a direct mathematical consequence of standard quantum theory (unitary matrices are invertible), it falls under common knowledge, though supportive evidence from the literature is also present.

Evidence for · 1

Closed-System Quantum Logic Network Implementation of the Viterbi Algorithm

2009

This paper notes that closed quantum systems obey unitary evolution and are therefore reversible, making reversibility a fundamental requirement in quantum computing.

Get citation

Al-Rabadi, A. (2009). Closed-System Quantum Logic Network Implementation of the Viterbi Algorithm. doi.org. https://doi.org/10.2298/FUEE0901001A

Related receipts

Is it true that physical information is fundamentally indestructible under unitary quantum mechanical evolution? SUPPORTED related question, same topic
Is it true that quantum computers use quantum entanglement to perform computations? CONTESTED PARTIAL related question, same topic

Receipt History

first checked06 Aug 2026

judged → COMMON KNOWLEDGE · 6206 Aug 2026

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