Memory attacks in network nonlocality and self-testing
We study what can or cannot be certified in communication scenarios where the assumption of independence and identical distribution (iid) between experimental rounds fails. In this respect, we prove that membership tests for non-convex sets of correlations cannot be formulated in the non-iid regime....
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2025-05-01
|
| Series: | Quantum |
| Online Access: | https://quantum-journal.org/papers/q-2025-05-06-1735/pdf/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850191864299257856 |
|---|---|
| author | Mirjam Weilenmann Costantino Budroni Miguel Navascues |
| author_facet | Mirjam Weilenmann Costantino Budroni Miguel Navascues |
| author_sort | Mirjam Weilenmann |
| collection | DOAJ |
| description | We study what can or cannot be certified in communication scenarios where the assumption of independence and identical distribution (iid) between experimental rounds fails. In this respect, we prove that membership tests for non-convex sets of correlations cannot be formulated in the non-iid regime. Similarly, it is impossible to self-test non-extreme quantum operations, such as mixed states, or noisy quantum measurements, unless one allows more than a single use thereof within the same experimental round. One consequence of our results is that non-classicality in causal networks without inputs cannot be experimentally demonstrated. By analyzing optimal non-iid strategies in the triangle scenario, we raise the need to take into account the prior communication required to set up a causal network. |
| format | Article |
| id | doaj-art-776d8d93ea1c4a36a6709c4031707cca |
| institution | OA Journals |
| issn | 2521-327X |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften |
| record_format | Article |
| series | Quantum |
| spelling | doaj-art-776d8d93ea1c4a36a6709c4031707cca2025-08-20T02:14:45ZengVerein zur Förderung des Open Access Publizierens in den QuantenwissenschaftenQuantum2521-327X2025-05-019173510.22331/q-2025-05-06-173510.22331/q-2025-05-06-1735Memory attacks in network nonlocality and self-testingMirjam WeilenmannCostantino BudroniMiguel NavascuesWe study what can or cannot be certified in communication scenarios where the assumption of independence and identical distribution (iid) between experimental rounds fails. In this respect, we prove that membership tests for non-convex sets of correlations cannot be formulated in the non-iid regime. Similarly, it is impossible to self-test non-extreme quantum operations, such as mixed states, or noisy quantum measurements, unless one allows more than a single use thereof within the same experimental round. One consequence of our results is that non-classicality in causal networks without inputs cannot be experimentally demonstrated. By analyzing optimal non-iid strategies in the triangle scenario, we raise the need to take into account the prior communication required to set up a causal network.https://quantum-journal.org/papers/q-2025-05-06-1735/pdf/ |
| spellingShingle | Mirjam Weilenmann Costantino Budroni Miguel Navascues Memory attacks in network nonlocality and self-testing Quantum |
| title | Memory attacks in network nonlocality and self-testing |
| title_full | Memory attacks in network nonlocality and self-testing |
| title_fullStr | Memory attacks in network nonlocality and self-testing |
| title_full_unstemmed | Memory attacks in network nonlocality and self-testing |
| title_short | Memory attacks in network nonlocality and self-testing |
| title_sort | memory attacks in network nonlocality and self testing |
| url | https://quantum-journal.org/papers/q-2025-05-06-1735/pdf/ |
| work_keys_str_mv | AT mirjamweilenmann memoryattacksinnetworknonlocalityandselftesting AT costantinobudroni memoryattacksinnetworknonlocalityandselftesting AT miguelnavascues memoryattacksinnetworknonlocalityandselftesting |