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

Horoshko, Dmitri; De Bievre, Stephan; Patera, Giuseppe; Kolobov, Mikhail

Document type :

Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès avec actes

DOI :

10.1051/epjconf/201919800010

Title :

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

Author(s) :

Horoshko, Dmitri [Auteur]
De Bievre, Stephan [Auteur]

Patera, Giuseppe [Auteur]

Kolobov, Mikhail [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]

Conference title :

QUANTUM TECHNOLOGY INTERNATIONAL CONFERENCE 2018 (QTECH 2018)

City :

Paris

Country :

France

Start date of the conference :

2018

Publication date :

2019

HAL domain(s) :

Physique [physics]/Physique Quantique [quant-ph]

English abstract : [en]

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 ...
Show more >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 down conversion 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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Centre Européen pour les Mathématiques, la Physique et leurs Interactions

Comment :

Quantum Technology International Conference (QTech), Ecole Normale Superieure Ulm, Paris, FRANCE, SEP 05-07, 2018