Quantum inputs in the prepare-and-measure scenario and stochastic teleportation
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866917384289255424 |
|---|---|
| author | Svegborn, Elna Pauwels, Jef Tavakoli, Armin |
| author_facet | Svegborn, Elna Pauwels, Jef Tavakoli, Armin |
| contents | We investigate prepare-and-measure scenarios in which a sender and a receiver use entanglement to send quantum information over a channel with limited capacity. We formalise this framework, identify its basic properties and provide numerical tools for optimising quantum protocols for generic communication tasks. The seminal protocol for sending quantum information over a classical channel is teleportation. We study a natural stochastic generalisation in which the sender holds $N$ qubits from which the receiver can recover one on demand. We show that with two bits of communication alone, this task can be solved exactly for all $N$, if the sender and receiver have access to stronger-than-quantum nonlocality. We then consider entanglement-based protocols and show that these can be constructed systematically by leveraging connections to several well-known quantum information primitives, such as teleportation, cloning machines and random access coding. In particular, we show that by using genuine multi-particle entangled measurements, one can construct a universal stochastic teleportation machine, i.e.~a device whose teleportation fidelity is independent of the quantum input. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_00162 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum inputs in the prepare-and-measure scenario and stochastic teleportation Svegborn, Elna Pauwels, Jef Tavakoli, Armin Quantum Physics We investigate prepare-and-measure scenarios in which a sender and a receiver use entanglement to send quantum information over a channel with limited capacity. We formalise this framework, identify its basic properties and provide numerical tools for optimising quantum protocols for generic communication tasks. The seminal protocol for sending quantum information over a classical channel is teleportation. We study a natural stochastic generalisation in which the sender holds $N$ qubits from which the receiver can recover one on demand. We show that with two bits of communication alone, this task can be solved exactly for all $N$, if the sender and receiver have access to stronger-than-quantum nonlocality. We then consider entanglement-based protocols and show that these can be constructed systematically by leveraging connections to several well-known quantum information primitives, such as teleportation, cloning machines and random access coding. In particular, we show that by using genuine multi-particle entangled measurements, one can construct a universal stochastic teleportation machine, i.e.~a device whose teleportation fidelity is independent of the quantum input. |
| title | Quantum inputs in the prepare-and-measure scenario and stochastic teleportation |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2504.00162 |