Ideal Quantum Tele-amplification up to a Selected Energy Cut-off using Linear Optics

Published on Oct 7, 2021in arXiv: Quantum Physics
Joshua J. Guanzon2
Estimated H-index: 2
,
Matthew S. Winnel2
Estimated H-index: 2
+ 1 AuthorsTimothy C. Ralph78
Estimated H-index: 78
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Abstract
We introduce a linear optical technique that can implement ideal quantum tele-amplification up to the n^\mathrm{th}Fock state, where ncan be any positive integer. Here tele-amplification consists of both quantum teleportation and noiseless linear amplification (NLA). This simple protocol consists of a beam-splitter and an (n+1)splitter, with nancillary photons and detection of nphotons. For a given target fidelity, our technique improves success probability and physical resource costs by orders of magnitude over current alternative teleportation and NLA schemes. We show how this protocol can also be used as a loss-tolerant quantum relay for entanglement distribution and distillation.
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5 Authors (Song Yang, ..., Xuling Lin)
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We propose and theoretically analyze a teleportation-based scheme for high-fidelity noiseless quantum amplification of coherent states of light. In our approach, the probabilistic noiseless quantum amplification operation is encoded into a suitable auxiliary two-mode entangled state and then applied to the input coherent state via continuous-variable quantum teleportation. The scheme requires conditioning on the outcomes of homodyne measurements in the teleportation protocol. In contrast to high...
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