Interferometric measurement of the quadrature ...
Type de document :
Compte-rendu et recension critique d'ouvrage
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]
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 >
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
Commentaire :
11 pages, 3 figures
Collections :
Source :
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