Entanglement protection in higher-dimensional systems

Singh, Ashutosh; Sinha, Urbasi

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7977

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DC Field	Value	Language
dc.contributor.author	Singh, Ashutosh	-
dc.contributor.author	Sinha, Urbasi	-
dc.date.accessioned	2022-07-29T12:01:05Z	-
dc.date.available	2022-07-29T12:01:05Z	-
dc.date.issued	2022-07-28	-
dc.identifier.citation	Physica Scripta, 2022, Vol.97, p085104	en_US
dc.identifier.issn	1402-4896 (Online)	-
dc.identifier.issn	0031-8949	-
dc.identifier.uri	http://hdl.handle.net/2289/7977	-
dc.description	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)	en_US
dc.description.abstract	The inevitable dissipative interaction of an entangled quantum system with its environment causes degradation in quantum correlations present in the system. This can lead to a finite-time disappearance of entanglement, which is known as Entanglement Sudden Death (ESD). Here, we consider an initially entangled qubit-qutrit system and a dissipative noise which leads to ESD, and propose a set of local unitary operations, which when applied on the qubit, qutrit, or both subsystems during the decoherence process, cause ESD to be hastened, delayed, or avoided altogether, depending on its time of application. Delay and avoidance of ESD may find practical application in quantum information processing protocols that would otherwise suffer due to short lifetime of entanglement. The physical implementation of these local unitaries is discussed in the context of an atomic system. The simulation results of such ESD manipulations are presented for two different classes of initially entangled qubit-qutrit systems. A prescription for generalization of this scheme to a qutrit-qutrit system is given. This technique for entanglement protection in the noisy environment is compared with other related techniques such as weak measurement reversal, dynamic decoupling, and quantum Zeno effect.	en_US
dc.language.iso	en	en_US
dc.publisher	IOP Publishing for the Royal Swedish Academy	en_US
dc.relation.uri	https://arxiv.org/abs/2001.07604	en_US
dc.relation.uri	https://doi.org/10.1088/1402-4896/ac8200	en_US
dc.relation.uri	https://ui.adsabs.harvard.edu/abs/2020arXiv200107604S/abstract	en_US
dc.rights	2022 IOP Publishng Ltd	en_US
dc.title	Entanglement protection in higher-dimensional systems	en_US
dc.type	Article	en_US
Appears in Collections:	Research Papers (LAMP)

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