External quantum fluctuations select measurement contexts
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916012185616384 |
|---|---|
| author | Hance, Jonte R. Ji, Ming Matsushita, Tomonori Hofmann, Holger F. |
| author_facet | Hance, Jonte R. Ji, Ming Matsushita, Tomonori Hofmann, Holger F. |
| contents | Quantum paradoxes show that the outcomes of different quantum measurements cannot be described by a single measurement-independent reality. Any theoretical description of a quantum measurement implies the selection of a specific measurement context. Here, we investigate generalised quantum measurements, in order to identify the mechanism by which this specific context is selected. We show that external quantum fluctuations, represented by the initial state of the measurement apparatus, play an essential role in the selection of the context. This has the non-trivial consequence that, when considering measurements other than just idealised projection-valued measures, different outcomes of a single measurement setup can represent different measurement contexts. We further show this result underpins recent claims that contextuality can occur in scenarios without measurement incompatibility. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_04664 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | External quantum fluctuations select measurement contexts Hance, Jonte R. Ji, Ming Matsushita, Tomonori Hofmann, Holger F. Quantum Physics History and Philosophy of Physics Quantum paradoxes show that the outcomes of different quantum measurements cannot be described by a single measurement-independent reality. Any theoretical description of a quantum measurement implies the selection of a specific measurement context. Here, we investigate generalised quantum measurements, in order to identify the mechanism by which this specific context is selected. We show that external quantum fluctuations, represented by the initial state of the measurement apparatus, play an essential role in the selection of the context. This has the non-trivial consequence that, when considering measurements other than just idealised projection-valued measures, different outcomes of a single measurement setup can represent different measurement contexts. We further show this result underpins recent claims that contextuality can occur in scenarios without measurement incompatibility. |
| title | External quantum fluctuations select measurement contexts |
| topic | Quantum Physics History and Philosophy of Physics |
| url | https://arxiv.org/abs/2501.04664 |