Search results for "Quantum spin chains"

showing 2 items of 2 documents

Multipartite entanglement transfer in spin chains

2020

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…

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 entanglementPhysics Letters A
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QUANTUM SPIN CHAINS WITH COMPOSITE SPIN

1988

The ground state of quantum spin chains with two spin-1/2 operators per site is determined from finite chain calculations and compared to predictions from the continuum limit. As particular cases, results for the spin-1 Heisenberg chain, the spin-1 model with bilinear and biquadratic exchange and the extended Hubbard model are analysed.

PhysicsQuantum spin chainsContinuum (measurement)Condensed matter physicsHubbard modelQuantum mechanicsComposite numberGeneral EngineeringBilinear interpolationCondensed Matter::Strongly Correlated ElectronsGround stateLe Journal de Physique Colloques
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