Entanglement distillation rates exceeding the direct transmission bound
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_ | 1866915215165095936 |
|---|---|
| author | Ghafari, Farzad Dias, Josephine Shalm, L Krister Verma, Varun B Slussarenko, Sergei Ralph, Timothy C Pryde, Geoff J |
| author_facet | Ghafari, Farzad Dias, Josephine Shalm, L Krister Verma, Varun B Slussarenko, Sergei Ralph, Timothy C Pryde, Geoff J |
| contents | Entanglement distribution is crucial for quantum communication and cryptography but is hindered by channel loss and decoherence. Noiseless linear amplification (NLA) is a probabilistic protocol that supports noiseless amplification without violating the no-cloning theorem, aiding in tasks like entanglement distillation and enhanced metrology. The probabilistic nature of NLA and other quantum repeater elements creates a significant resource overhead, which depends on the success rate of each individual probabilistic step. We experimentally demonstrate a technique to increase NLA success probability while maintaining the amplification gain and the fidelity of the amplified state with a maximally entangled state. We show that symmetrically distributing loss before and after the amplification provides an improved scaling of the success rates of NLA. Our results are a critical step towards scalable quantum repeaters and enable efficient long-distance quantum communication |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_21133 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Entanglement distillation rates exceeding the direct transmission bound Ghafari, Farzad Dias, Josephine Shalm, L Krister Verma, Varun B Slussarenko, Sergei Ralph, Timothy C Pryde, Geoff J Quantum Physics Entanglement distribution is crucial for quantum communication and cryptography but is hindered by channel loss and decoherence. Noiseless linear amplification (NLA) is a probabilistic protocol that supports noiseless amplification without violating the no-cloning theorem, aiding in tasks like entanglement distillation and enhanced metrology. The probabilistic nature of NLA and other quantum repeater elements creates a significant resource overhead, which depends on the success rate of each individual probabilistic step. We experimentally demonstrate a technique to increase NLA success probability while maintaining the amplification gain and the fidelity of the amplified state with a maximally entangled state. We show that symmetrically distributing loss before and after the amplification provides an improved scaling of the success rates of NLA. Our results are a critical step towards scalable quantum repeaters and enable efficient long-distance quantum communication |
| title | Entanglement distillation rates exceeding the direct transmission bound |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2503.21133 |