Quantum Repeater using Two-Mode Squeezed States and Atomic Noiseless Amplifiers
Abstract
We perform a theoretical investigation into how a two-mode squeezed vacuum state, that has undergone photon loss, can be stored and purified using noiseless amplification with a collection of solid-state qubits. The proposed method may be used to probabilistically increase the entanglement between the two parties sharing the state. The proposed amplification step is similar in structure to a set of quantum scissors. However, in this work the amplification step is realized by a state transfer from an optical mode to a set of solid-state qubits, which act as a quantum memory. We explore two different applications, the generation of entangled many-qubit registers, and the construction of quantum repeaters for long-distance quantum key distribution.
Cite
@article{arxiv.2211.16343,
title = {Quantum Repeater using Two-Mode Squeezed States and Atomic Noiseless Amplifiers},
author = {Anders J. E. Bjerrum and Jonatan B. Brask and Jonas S. Neergaard-Nielsen and Ulrik L. Andersen},
journal= {arXiv preprint arXiv:2211.16343},
year = {2023}
}