An entangled photon source for the telecom C-band based on a semiconductor-confined spin
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866916822301802496 |
|---|---|
| author | Laccotripes, Petros Huang, Junyang Shooter, Ginny Barbiero, Andrea Winnel, Matthew S. Ritchie, David A. Shields, Andrew J. Muller, Tina Stevenson, R. Mark |
| author_facet | Laccotripes, Petros Huang, Junyang Shooter, Ginny Barbiero, Andrea Winnel, Matthew S. Ritchie, David A. Shields, Andrew J. Muller, Tina Stevenson, R. Mark |
| contents | Multiphoton entangled states are a key resource for quantum networks and measurement-based quantum computation. Scalable protocols for generating such states using solid-state spin-photon interfaces have recently emerged, but practical implementations have so far relied on emitters operating at short wavelengths, incompatible with low-loss fibre transmission. Here, we take a key step towards the generation of telecom wavelength multi-qubit entangled states using an InAs/InP quantum dot. After establishing that all essential criteria for generating cluster states using a ground state spin as the entangler are satisfied, we implement a scalable protocol to entangle the resident spin with sequentially emitted photons directly in the telecom C-band. We demonstrate a two-qubit (spin-photon) entanglement fidelity of $59.5\pm 8.7\%$ and a lower bound of three-qubit (spin-photon-photon) entanglement fidelity of $52.7\pm 11.4\%$. Our results close the performance gap between short-wavelength quantum dot systems and the existing telecom infrastructure, establishing a route towards practical large photonic cluster states for fibre-based quantum network applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_01648 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An entangled photon source for the telecom C-band based on a semiconductor-confined spin Laccotripes, Petros Huang, Junyang Shooter, Ginny Barbiero, Andrea Winnel, Matthew S. Ritchie, David A. Shields, Andrew J. Muller, Tina Stevenson, R. Mark Quantum Physics Multiphoton entangled states are a key resource for quantum networks and measurement-based quantum computation. Scalable protocols for generating such states using solid-state spin-photon interfaces have recently emerged, but practical implementations have so far relied on emitters operating at short wavelengths, incompatible with low-loss fibre transmission. Here, we take a key step towards the generation of telecom wavelength multi-qubit entangled states using an InAs/InP quantum dot. After establishing that all essential criteria for generating cluster states using a ground state spin as the entangler are satisfied, we implement a scalable protocol to entangle the resident spin with sequentially emitted photons directly in the telecom C-band. We demonstrate a two-qubit (spin-photon) entanglement fidelity of $59.5\pm 8.7\%$ and a lower bound of three-qubit (spin-photon-photon) entanglement fidelity of $52.7\pm 11.4\%$. Our results close the performance gap between short-wavelength quantum dot systems and the existing telecom infrastructure, establishing a route towards practical large photonic cluster states for fibre-based quantum network applications. |
| title | An entangled photon source for the telecom C-band based on a semiconductor-confined spin |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2507.01648 |