2020/01/01 by Harshit Verma, L. Chotorlishvili, Verma, Harshit +5
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Neural Networks and Reservoir Computing #Quantum many-body systems
paper · pdf · doi:10.48550/arxiv.2011.03873
We develop a new protocol for sharing entanglement (one ebit) between two\nparties using the natural dynamics of helical multiferroic spin chains. We\nintroduce a novel kicking scheme of the electric field for enhancing the\nteleportation fidelity in our protocol that works in the presence of an\nappropriate choice of parameters. We also investigate the effect of a common\nspin environment causing decoherence in the entanglement sharing channel. We\ncompare the results to that of XXZ and XX models subject to a similar\nentanglement sharing protocol and find that the helical multiferroic chain with\nthe kicking scheme provides a better singlet fraction. We show that the kicking\nscheme in conjugation with the optimized parameters enhances the fidelity of\nteleportation even in the presence of impurities and/or decoherence. The\nadvantage of the kicking scheme shown in the impurity cases is an important\nresult to be useful in a realizable setup of helical multiferroic spin chain.\n