Thermal-difference states of light: true states of heralded photons

Thermal-difference states of light: true states of heralded photons

We introduce a three-parameter family of single-mode optical states whose density operator is a weighted difference of two thermal states, the thermal-difference states. We identify the parameter values for which these states have a negative non-singular P-function, implying they are nonclassical. W...

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Main Authors: Horoshko Dmitri, De Bièvre Stephan, Patera Giuseppe, Kolobov Mikhail
Format: Article
Language:English
Published: EDP Sciences 2019-01-01
Series:EPJ Web of Conferences
Online Access:https://doi.org/10.1051/epjconf/201919800010
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spelling doaj-b2b75005f0b84b12a32cc43df2ffc6292021-08-02T19:03:35ZengEDP SciencesEPJ Web of Conferences2100-014X2019-01-011980001010.1051/epjconf/201919800010epjconf_qtech2018_00010Thermal-difference states of light: true states of heralded photonsHoroshko DmitriDe Bièvre Stephan0Patera Giuseppe1Kolobov Mikhail2Univ. Lille, CNRSUniv. Lille, CNRSUniv. Lille, CNRSWe introduce a three-parameter family of single-mode optical states whose density operator is a weighted difference of two thermal states, the thermal-difference states. We identify the parameter values for which these states have a negative non-singular P-function, implying they are nonclassical. We show that the states of the “heralded photons” generated via spontaneous parametric downconversion belong to this family, with the three parameters corresponding to the nonlinear gain and the losses in the signal and the idler channels. The thermal-difference states yield new benchmark states for the analysis of nonclassicality and quantum macroscopicity criteria.https://doi.org/10.1051/epjconf/201919800010
collection DOAJ
language English
format Article
sources DOAJ
author Horoshko Dmitri
De Bièvre Stephan
Patera Giuseppe
Kolobov Mikhail
spellingShingle Horoshko Dmitri
De Bièvre Stephan
Patera Giuseppe
Kolobov Mikhail
Thermal-difference states of light: true states of heralded photons
EPJ Web of Conferences
author_facet Horoshko Dmitri
De Bièvre Stephan
Patera Giuseppe
Kolobov Mikhail
author_sort Horoshko Dmitri
title Thermal-difference states of light: true states of heralded photons
title_short Thermal-difference states of light: true states of heralded photons
title_full Thermal-difference states of light: true states of heralded photons
title_fullStr Thermal-difference states of light: true states of heralded photons
title_full_unstemmed Thermal-difference states of light: true states of heralded photons
title_sort thermal-difference states of light: true states of heralded photons
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2019-01-01
description We introduce a three-parameter family of single-mode optical states whose density operator is a weighted difference of two thermal states, the thermal-difference states. We identify the parameter values for which these states have a negative non-singular P-function, implying they are nonclassical. We show that the states of the “heralded photons” generated via spontaneous parametric downconversion belong to this family, with the three parameters corresponding to the nonlinear gain and the losses in the signal and the idler channels. The thermal-difference states yield new benchmark states for the analysis of nonclassicality and quantum macroscopicity criteria.
url https://doi.org/10.1051/epjconf/201919800010
work_keys_str_mv AT horoshkodmitri thermaldifferencestatesoflighttruestatesofheraldedphotons
AT debievrestephan thermaldifferencestatesoflighttruestatesofheraldedphotons
AT pateragiuseppe thermaldifferencestatesoflighttruestatesofheraldedphotons
AT kolobovmikhail thermaldifferencestatesoflighttruestatesofheraldedphotons
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