Noiseless Loss Suppression for Entanglement Distribution

Published

December 2, 2024

Author(s)

Cory Nunn, Daniel Jones, Todd Pittman, Brian Kirby

Abstract

Recent work by Mičuda et al. [Phys. Rev. Lett 109, 180503 (2012)] 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 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 vacuum 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.

Citation

Physical Review A

Volume

110

Issue

6

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevA.110.062405

Local Download

Keywords

quantum communication, quantum entanglement, conditional measurements

Citation

Nunn, C. , Jones, D. , Pittman, T. and Kirby, B. (2024), Noiseless Loss Suppression for Entanglement Distribution, Physical Review A, [online], https://doi.org/10.1103/PhysRevA.110.062405, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=957777 (Accessed October 11, 2025)