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EnglishWe investigate the transfer of genuine multipartite entanglement across a spin-1/2 chain with nearest-neighbour XX-type interaction. We focus on the perturbative regime, where a block of spins is weakly coupled at each edge of a quantum wire, embodying the role of a multiqubit sender and receiver, respectively. We find that high-quality multipartite entanglement transfer is achieved at the same time that three excitations are transferred to the opposite edge of the chain. Moreover, we find that both a finite concurrence and tripartite negativity is attained at much shorter time, making GHZ-distillation protocols feasible. Finally, we investigate the robustness of our protocol with respect to non-perturbative couplings and increasing lengths of the quantum wire.
Apollaro T.J.G., Sanavio C., Chetcuti W.J., & Lorenzo S. (2020). Multipartite entanglement transfer in spin chains. PHYSICS LETTERS A, 384(15), 126306.
| Data di pubblicazione: | 2020 |
| Titolo: | Multipartite entanglement transfer in spin chains |
| Autori: | |
| Citazione: | Apollaro T.J.G., Sanavio C., Chetcuti W.J., & Lorenzo S. (2020). Multipartite entanglement transfer in spin chains. PHYSICS LETTERS A, 384(15), 126306. |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.physleta.2020.126306 |
| Abstract: | We investigate the transfer of genuine multipartite entanglement across a spin-1/2 chain with nearest-neighbour XX-type interaction. We focus on the perturbative regime, where a block of spins is weakly coupled at each edge of a quantum wire, embodying the role of a multiqubit sender and receiver, respectively. We find that high-quality multipartite entanglement transfer is achieved at the same time that three excitations are transferred to the opposite edge of the chain. Moreover, we find that both a finite concurrence and tripartite negativity is attained at much shorter time, making GHZ-distillation protocols feasible. Finally, we investigate the robustness of our protocol with respect to non-perturbative couplings and increasing lengths of the quantum wire. |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| 2001.03529.pdf | Pre-print | Open Access Visualizza/Apri |
http://hdl.handle.net/10447/406245
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