Harnessing temporal modes for multi-photon quantum information processing based on integrated optics

In the last few decades, there has been much progress on low loss waveguides, very efficient photon-number detectors and nonlinear processes. Engineered sum-frequency conversion is now at a stage where it allows operation on arbitrary temporal broadband modes, thus making the spectral degree of free...

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Published inPhilosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences Vol. 375; no. 2099; p. 20160244
Main Authors Harder, G., Ansari, V., Bartley, T. J., Brecht, B., Silberhorn, C.
Format Journal Article
LanguageEnglish
Published England The Royal Society Publishing 06.08.2017
Subjects
Beam splitters
Broadband
Coding
Conversion
Data processing
Integrated optics
Quantum phenomena
Quantum Pulse Gate
Quantum theory
Squeezed States
Squeezed states (quantum theory)
Temporal Modes
Waveguides
temporal modes
quantum pulse gate
squeezed states
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Summary:In the last few decades, there has been much progress on low loss waveguides, very efficient photon-number detectors and nonlinear processes. Engineered sum-frequency conversion is now at a stage where it allows operation on arbitrary temporal broadband modes, thus making the spectral degree of freedom accessible for information coding. Hereby the information is often encoded into the temporal modes of a single photon. Here, we analyse the prospect of using multi-photon states or squeezed states in different temporal modes based on integrated optics devices. We describe an analogy between mode-selective sum-frequency conversion and a network of spatial beam splitters. Furthermore, we analyse the limits on the achievable squeezing in waveguides with current technology and the loss limits in the conversion process. This article is part of the themed issue ‘Quantum technology for the 21st century’.
Bibliography:Discussion meeting issue “Quantum technology for the 21st century” organised and edited by Peter Knight, Ian Walmsley, Gerard Milburn, Jonathan Pritchard and Stephen Till
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One contribution of 7 to a discussion meeting issue ‘Quantum technology for the 21st century’.
ISSN:1364-503X
1471-2962
DOI:10.1098/rsta.2016.0244