Nonclassical energy-change distribution as a witness of non-Markovian quantum dynamics
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866910260458946560 |
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| author | Pezzutto, Marco Corr, Anton De Chiara, Gabriele Lorenzo, Salvatore Gherardini, Stefano |
| author_facet | Pezzutto, Marco Corr, Anton De Chiara, Gabriele Lorenzo, Salvatore Gherardini, Stefano |
| contents | We address the problem of identifying non-Markovian quantum time evolutions of an open quantum system by only performing measurements of the system's energy. We demonstrate that violations of CP-divisibility are always witnessed by non-positive values of the energy-change Kirkwood-Dirac quasiprobability distribution associated with the system's Hamiltonian, evaluated at consecutive times. The link between non CP-divisibility and non-positivity of the system's energy-change distribution is stronger when the system-environment interactions are energy-preserving. The witness works whenever anomalous energy fluxes, due to non-Markovianity, are realized. Anomalous fluxes are also detected by the non-Markovianity measure built over the quantum mutual information between the states of the open system and of a quantum correlated reference. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_26818 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nonclassical energy-change distribution as a witness of non-Markovian quantum dynamics Pezzutto, Marco Corr, Anton De Chiara, Gabriele Lorenzo, Salvatore Gherardini, Stefano Quantum Physics Statistical Mechanics We address the problem of identifying non-Markovian quantum time evolutions of an open quantum system by only performing measurements of the system's energy. We demonstrate that violations of CP-divisibility are always witnessed by non-positive values of the energy-change Kirkwood-Dirac quasiprobability distribution associated with the system's Hamiltonian, evaluated at consecutive times. The link between non CP-divisibility and non-positivity of the system's energy-change distribution is stronger when the system-environment interactions are energy-preserving. The witness works whenever anomalous energy fluxes, due to non-Markovianity, are realized. Anomalous fluxes are also detected by the non-Markovianity measure built over the quantum mutual information between the states of the open system and of a quantum correlated reference. |
| title | Nonclassical energy-change distribution as a witness of non-Markovian quantum dynamics |
| topic | Quantum Physics Statistical Mechanics |
| url | https://arxiv.org/abs/2605.26818 |