Universal Protection of Quantum States from Decoherence
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866908844094914560 |
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| author | Atzori, Francesco Virzì, Salvatore Devecchi, Francesco Abbondandolo, Domenico Avella, Alessio Piacentini, Fabrizio Gramegna, Marco Degiovanni, Ivo Pietro Genovese, Marco |
| author_facet | Atzori, Francesco Virzì, Salvatore Devecchi, Francesco Abbondandolo, Domenico Avella, Alessio Piacentini, Fabrizio Gramegna, Marco Degiovanni, Ivo Pietro Genovese, Marco |
| contents | The fragility of quantum coherence fundamentally limits the scalability of quantum technologies, as unavoidable environmental interactions induce decoherence and rapidly degrade quantum properties. The Quantum Zeno Effect offers a powerful route to suppress quantum evolution and protect coherence through frequent measurements, irrespective of the underlying dynamics. However, existing implementations require prior knowledge of the quantum state, severely restricting their applicability. Here we introduce a state- and dynamics-independent protection protocol embedding the system in a larger Hilbert space, temporarily swapping the quantum information from its original degree of freedom to a decoherence-free ancillary one. We experimentally validate the protocol on a quantum optical platform, demonstrating robust preservation of coherence and purity for arbitrary polarization qubits under decoherence, thereby enabling the universal safeguarding of unknown quantum states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_18327 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Universal Protection of Quantum States from Decoherence Atzori, Francesco Virzì, Salvatore Devecchi, Francesco Abbondandolo, Domenico Avella, Alessio Piacentini, Fabrizio Gramegna, Marco Degiovanni, Ivo Pietro Genovese, Marco Quantum Physics The fragility of quantum coherence fundamentally limits the scalability of quantum technologies, as unavoidable environmental interactions induce decoherence and rapidly degrade quantum properties. The Quantum Zeno Effect offers a powerful route to suppress quantum evolution and protect coherence through frequent measurements, irrespective of the underlying dynamics. However, existing implementations require prior knowledge of the quantum state, severely restricting their applicability. Here we introduce a state- and dynamics-independent protection protocol embedding the system in a larger Hilbert space, temporarily swapping the quantum information from its original degree of freedom to a decoherence-free ancillary one. We experimentally validate the protocol on a quantum optical platform, demonstrating robust preservation of coherence and purity for arbitrary polarization qubits under decoherence, thereby enabling the universal safeguarding of unknown quantum states. |
| title | Universal Protection of Quantum States from Decoherence |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2602.18327 |