Impossible to conjugate an unknown quantum state via a unitary evolution

• URL: http://arxiv.org/abs/2609.11536v1
• Date: Thu, 10 Sep 2026 13:35:38 GMT
• Title: Impossible to conjugate an unknown quantum state via a unitary evolution
• Abstract summary: We propose the no-conjugating theorem which states that it is impossible to conjugate an unknown arbitrary quantum state via a universal physical device or linear/unitary operation.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The no-cloning theorem, the no-deleting theorem, the no-hiding theorem, the no-flip theorem, and the no-broadcasting play a crucial role in quantum mechanics and quantum information. In this paper, we propose the no-conjugating theorem which states that it is impossible to conjugate an unknown arbitrary quantum state via a universal physical device or linear/unitary operation.

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