Noiseless Loss Suppression for Entanglement Distribution

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2405.00510v1.pdf (916.68 KB)

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http://arxiv.org/abs/2405.00510

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https://doi.org/10.48550/arXiv.2405.00510
 http://hdl.handle.net/11603/36572

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UMBC Faculty Collection
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Author/Creator ORCID

https://orcid.org/0000-0002-3269-1091
 https://orcid.org/0000-0001-8712-3051

Date

2024-05-01

Type of Work

journal articles
preprints
Text

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Citation of Original Publication

Rights

This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain

Subjects

Quantum Physics

Abstract

Recent work by Mičuda et al. (arXiv:1206.2852v1) suggests that pairing noiseless amplification with noiseless attenuation can conditionally suppress loss terms in the direct transmission of quantum states. Here we extend this work to entangled states: first, we explore bipartite states, specifically the two-mode squeezed vacuum (TMSV) and NOON states; and second, we examine M-partite states, concentrating on W and Greenberger-Horne-Zeilinger (GHZ) states. In analogy with the original proposal, our results demonstrate that in each case under consideration, a correct combination of attenuation and amplification techniques before and after transmission through a pure loss channel can restore the initial quantum state. However, we find that for both W and NOON states, the noiseless attenuation is redundant and not required to achieve loss term suppression. This work clarifies the role of noiseless attenuation when paired with noiseless amplification for entanglement distribution and provides an operational example of how GHZ and W state entanglement differs.