Multipartite entanglement transfer in spin chains
| Autor: | Salvatore Lorenzo, Wayne Jordan Chetcuti, Tony J. G. Apollaro, Claudio Sanavio |
|---|---|
| Přispěvatelé: | Apollaro T.J.G., Sanavio C., Chetcuti W.J., Lorenzo S. |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Quantum Physics Spins Quantum wire FOS: Physical sciences General Physics and Astronomy Concurrence Perturbative dynamic 01 natural sciences Multipartite entanglement 010305 fluids & plasmas Condensed Matter - Other Condensed Matter Quantum spin chain Chain (algebraic topology) Robustness (computer science) Quantum spin chains Quantum mechanics 0103 physical sciences Quantum Physics (quant-ph) 010306 general physics Focus (optics) Other Condensed Matter (cond-mat.other) Spin-½ |
| Zdroj: | Physics Letters A |
| ISSN: | 0375-9601 |
| DOI: | 10.1016/j.physleta.2020.126306 |
| Popis: | We investigate the transfer of genuine multipartite entanglement across a spin-1/2 chain with nearest-neighbor 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. Comment: Comments welcome |
| Databáze: | OpenAIRE |
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