![]() ![]() These properties make multipartite steering has received increasing attention. In addition, multipartite steering can be further applied to large-scale quantum networks 15. For example, in the tripartite system, there are genuine tripartite steering, reduced bipartite steering and collective steering 1. There are more various steering scenarios in multipartite system compared with the bipartite steering. Reid found that one party can steer two independent systems, but it is impossible for two parties to independently demonstrate steering of a third system 14. The asymmetric steering has been experimentally demonstrated both in continuous and discrete variable bipartite systems 10, 11, 12, 13.Īnother directional feature of quantum steering is the monogamy relation in multipartite system. Especially, it exhibits unique asymmetric feature, which can lead to one-way steering where one party can steer the other party’s state, but not vice versa 7, 8, 9. According to the hierarchy of quantum correlations, quantum steering stands between entanglement and Bell nonlocality. provided an operational definition and specific experimental criteria for quantum steering based on the local hidden state model in the form of quantum information tasks 5, 6. However, it did not attach much attention until 2007 when Wiseman et al. It was first put forward by Schrödinger 2, 3 as a reply to the well-known EPR paradox 4. Quantum steering 1 enables an untrusted party to remotely steer the quantum state of other trusted parties by performing local measurement on his own state. Our work provides comprehensive information about the effect of decoherence on multipartite quantum steering, which will help to realize quantum information processing tasks in the presence of noise environments. There is a trade-off between the monogamy relation involving one steered party and two steered parties. In addition, we find that not only one party can be steered by a group system, but also two parties can be steered by a single system. Unlike entanglement and Bell nonlocality, the thresholds of decoherence strength that reduced bipartite steering and collective steering can survive depend on the steering direction. The results show that these steering correlations decay the slowest in PDC and some non-maximally entangled states more robust than the maximally entangled ones. ![]() Our results provide the region of decoherence strength and state parameters that each type of steering can survive. We study the dynamic behaviors of genuine tripartite steering, reduced bipartite steering, and collective steering of a generalized three-qubit W state when only one qubit interacts independently with the amplitude damping channel (ADC), phase damping channel (PDC) or depolarizing channel (DC). ![]() It is thus of importance to understand how it decays in the presence of noise channels. Multipartite quantum steering, a unique resource for asymmetric quantum network information tasks, is very fragile to the inevitable decoherence, which makes it useless for practical purposes. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |