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Conference on Lasers and Electro-Optics

Fundamental Bounds and Performance Tests for the Storage or Transmission of Quantum Light

Hauke Häseler, Nathan Killoran, Norbert Lütkenhaus

Published Jan 1, 2010• 0 citations
Publisher

Abstract

We derive benchmarks for the quantum storage or transmission of light which are optimal while requiring minimal experimental resources. Quantitative statements on quantum device performance are derived by extending the method using entanglement measures.
DOI
10.1364/qels.2010.qwh4

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In this thesis, we develop a number of operational tests and tools for benchmarking the quantum nature of optical quantum communication devices. Using the laws of quantum physics, ideal quantum devices can fundamentally outperform their classical counterparts, or even achieve objectives which are classically impossible. Actual devices will not be ideal, but they may still be capable of facilitating quantum communication. Benchmarking tests, based on the presence of entanglement, can be used to verify whether or not imperfect quantum devices offer any advantage over their classical analogs. The general goal in this thesis is to provide strong benchmarking tools which simultaneously require minimal experimental resources but also offer a wide range of applicability. Another major component is the extension of existing qualitative benchmarks (`Is it quantum or classical?') to more quantitative forms (`How quantum is it?'). We provide a number of benchmarking results applicable to two main situations, namely discrete remote state preparation protocols and continuous-variable quantum device testing. The theoretical tools derived throughout this thesis are also applied to the tasks of certifying a remote state preparation experiment and a continuous-variable quantum memory.