Joint-measurability and quantum communication with untrusted devices
Photon loss represents a major challenge for the implementation of quantum communication protocols with untrusted devices, e.g. in the device-independent (DI) or semi-DI approaches. Determining critical loss thresholds is usually done in case-by-case studies. In the present work, we develop a genera...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2024-12-01
|
| Series: | Quantum |
| Online Access: | https://quantum-journal.org/papers/q-2024-12-23-1574/pdf/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846111030863724544 |
|---|---|
| author | Michele Masini Marie Ioannou Nicolas Brunner Stefano Pironio Pavel Sekatski |
| author_facet | Michele Masini Marie Ioannou Nicolas Brunner Stefano Pironio Pavel Sekatski |
| author_sort | Michele Masini |
| collection | DOAJ |
| description | Photon loss represents a major challenge for the implementation of quantum communication protocols with untrusted devices, e.g. in the device-independent (DI) or semi-DI approaches. Determining critical loss thresholds is usually done in case-by-case studies. In the present work, we develop a general framework for characterizing the admissible levels of loss and noise in a wide range of scenarios and protocols with untrusted measurement devices. In particular, we present general bounds that apply to prepare-and-measure protocols for the semi-DI approach, as well as to Bell tests for DI protocols. A key step in our work is to establish a general connection between quantum protocols with untrusted measurement devices and the fundamental notions of channel extendibility and joint-measurability, which capture essential aspects of the communication and measurement of quantum information. In particular, this leads us to introduce the notion of partial joint-measurability, which naturally arises within quantum cryptography. |
| format | Article |
| id | doaj-art-3c39d17f1bb040599d30cd800c269a4e |
| institution | Kabale University |
| issn | 2521-327X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften |
| record_format | Article |
| series | Quantum |
| spelling | doaj-art-3c39d17f1bb040599d30cd800c269a4e2024-12-23T13:08:27ZengVerein zur Förderung des Open Access Publizierens in den QuantenwissenschaftenQuantum2521-327X2024-12-018157410.22331/q-2024-12-23-157410.22331/q-2024-12-23-1574Joint-measurability and quantum communication with untrusted devicesMichele MasiniMarie IoannouNicolas BrunnerStefano PironioPavel SekatskiPhoton loss represents a major challenge for the implementation of quantum communication protocols with untrusted devices, e.g. in the device-independent (DI) or semi-DI approaches. Determining critical loss thresholds is usually done in case-by-case studies. In the present work, we develop a general framework for characterizing the admissible levels of loss and noise in a wide range of scenarios and protocols with untrusted measurement devices. In particular, we present general bounds that apply to prepare-and-measure protocols for the semi-DI approach, as well as to Bell tests for DI protocols. A key step in our work is to establish a general connection between quantum protocols with untrusted measurement devices and the fundamental notions of channel extendibility and joint-measurability, which capture essential aspects of the communication and measurement of quantum information. In particular, this leads us to introduce the notion of partial joint-measurability, which naturally arises within quantum cryptography.https://quantum-journal.org/papers/q-2024-12-23-1574/pdf/ |
| spellingShingle | Michele Masini Marie Ioannou Nicolas Brunner Stefano Pironio Pavel Sekatski Joint-measurability and quantum communication with untrusted devices Quantum |
| title | Joint-measurability and quantum communication with untrusted devices |
| title_full | Joint-measurability and quantum communication with untrusted devices |
| title_fullStr | Joint-measurability and quantum communication with untrusted devices |
| title_full_unstemmed | Joint-measurability and quantum communication with untrusted devices |
| title_short | Joint-measurability and quantum communication with untrusted devices |
| title_sort | joint measurability and quantum communication with untrusted devices |
| url | https://quantum-journal.org/papers/q-2024-12-23-1574/pdf/ |
| work_keys_str_mv | AT michelemasini jointmeasurabilityandquantumcommunicationwithuntrusteddevices AT marieioannou jointmeasurabilityandquantumcommunicationwithuntrusteddevices AT nicolasbrunner jointmeasurabilityandquantumcommunicationwithuntrusteddevices AT stefanopironio jointmeasurabilityandquantumcommunicationwithuntrusteddevices AT pavelsekatski jointmeasurabilityandquantumcommunicationwithuntrusteddevices |