Teleamplification on the Borealis boson-sampling device

TL;DR

This paper demonstrates the adaptation of a theoretical teleamplification protocol on the Borealis quantum device, successfully amplifying squeezed-vacuum states with high fidelity, advancing photonic quantum computing applications.

Contribution

It adapts a recent theoretical teleamplification scheme for the Borealis device and experimentally demonstrates its effectiveness with variable amplification factors.

Findings

Fidelities achieved range from 50% to 93%.

Results align with theoretical predictions.

Demonstrates potential for noiseless linear amplification in quantum technologies.

Abstract

A recent theoretical proposal for teleamplification requires preparation of Fock states, programmable interferometers, and photon-number resolving detectors to herald the teleamplification of an input state. These enable teleportation and heralded noiseless linear amplification of a photonic state up to an arbitrarily large energy cutoff. We report on adapting this proposal for Borealis and demonstrating teleamplification of squeezed-vacuum states with variable amplification factors. The results match the theoretical predictions and exhibit features of amplification in the teleported mode, with fidelities from 50 to 93%. This demonstration motivates the continued development of photonic quantum computing hardware for noiseless linear amplification's applications across quantum communication, sensing, and error correction.