Titre :

Interferometric measurement of the quadrature coherence scale using two replicas of a quantum optical state

Auteur(s) :

Griffet, Célia [Auteur]
Université libre de Bruxelles [ULB]
Arnhem, Matthieu [Auteur]
Université libre de Bruxelles [ULB]
De Bièvre, Stephan [Auteur]
Université de Lille
Laboratoire Paul Painlevé - UMR 8524 [LPP]
Systèmes de particules et systèmes dynamiques [Paradyse]
Cerf, Nicolas [Auteur]
Université libre de Bruxelles [ULB]

Titre de la revue :

Physical Review A

Pagination :

023730

Éditeur :

American Physical Society

Date de publication :

2023-08-31

ISSN :

2469-9926

Discipline(s) HAL :

Physique [physics]

Résumé en anglais : [en]

Assessing whether a quantum state $\hat \rho$ is nonclassical (i.e., incompatible with a mixture of coherent states) is a ubiquitous question in quantum optics, yet a nontrivial experimental task because many nonclassicality ...
Lire la suite >Assessing whether a quantum state $\hat \rho$ is nonclassical (i.e., incompatible with a mixture of coherent states) is a ubiquitous question in quantum optics, yet a nontrivial experimental task because many nonclassicality witnesses are nonlinear in $\hat \rho$. In particular, if we want to witness or measure the nonclassicality of a state by evaluating its quadrature coherence scale, this a priori requires full state tomography. Here, we provide an experimentally friendly procedure for directly accessing this quantity with a simple linear interferometer involving two replicas (independent and identical copies) of the state $\hat \rho$ supplemented with photon number measurements. This finding, that we interpret as an extension of the Hong-Ou-Mandel effect, illustrates the wide applicability of the multicopy interferometric technique in order to circumvent state tomography in quantum optics.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Projet ANR :

Centre Européen pour les Mathématiques, la Physique et leurs Interactions

Commentaire :

11 pages, 3 figures

Collections :

• Laboratoire Paul Painlevé - UMR 8524

Source :

Harvested from HAL