Purification of quantum trajectories in infinite dimensions
Fuente:
arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866916952884117504 |
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| author | Girotti, Federico Vitale, Alessandro |
| author_facet | Girotti, Federico Vitale, Alessandro |
| contents | In this work we exhibit a class of examples that show that the characterization of purification of quantum trajectories in terms of 'dark' subspaces that was proved for finite dimensional systems fails to hold in infinite dimensional ones. Moreover, we prove that the new phenomenon emerging in our class of models and preventing purification to happen is the only new possibility that emerges in infinite dimensional systems. Our proof strategy points out that the emergence of new phenomena in infinite dimensional systems is due to the fact that the set of orthogonal projections is not sequentially compact. Having in mind this insight, we are able to prove that the finite dimensional extends to a class of infinite dimensional models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_13377 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Purification of quantum trajectories in infinite dimensions Girotti, Federico Vitale, Alessandro Quantum Physics Probability 60J05, 81P16 In this work we exhibit a class of examples that show that the characterization of purification of quantum trajectories in terms of 'dark' subspaces that was proved for finite dimensional systems fails to hold in infinite dimensional ones. Moreover, we prove that the new phenomenon emerging in our class of models and preventing purification to happen is the only new possibility that emerges in infinite dimensional systems. Our proof strategy points out that the emergence of new phenomena in infinite dimensional systems is due to the fact that the set of orthogonal projections is not sequentially compact. Having in mind this insight, we are able to prove that the finite dimensional extends to a class of infinite dimensional models. |
| title | Purification of quantum trajectories in infinite dimensions |
| topic | Quantum Physics Probability 60J05, 81P16 |
| url | https://arxiv.org/abs/2509.13377 |