6533b829fe1ef96bd128ad85

RESEARCH PRODUCT

Multipartite entanglement transfer in spin chains

Salvatore LorenzoSalvatore LorenzoWayne Jordan ChetcutiTony J. G. ApollaroClaudio Sanavio

subject

PhysicsQuantum PhysicsSpinsQuantum wireFOS: Physical sciencesGeneral Physics and AstronomyConcurrenceQuantum PhysicsPerturbative dynamic01 natural sciencesMultipartite entanglement010305 fluids & plasmasCondensed Matter - Other Condensed MatterQuantum spin chainChain (algebraic topology)Robustness (computer science)Quantum spin chainsQuantum mechanics0103 physical sciencesQuantum Physics (quant-ph)010306 general physicsFocus (optics)Other Condensed Matter (cond-mat.other)Spin-½Multipartite entanglement

description

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.

yearjournalcountryeditionlanguage
2020-01-10Physics Letters A
10.1016/j.physleta.2020.126306http://dx.doi.org/10.1016/j.physleta.2020.126306