Interferometric measurement of the quadrature ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Interferometric measurement of the quadrature coherence scale using two replicas of a quantum optical state
Author(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]
Journal title :
Physical Review A
Pages :
023730
Publisher :
American Physical Society
Publication date :
2023-08-31
ISSN :
2469-9926
HAL domain(s) :
Physique [physics]
English abstract : [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 ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Popular science :
Non
Comment :
11 pages, 3 figures
Collections :
Source :
Files
- 2211.12992
- Open access
- Access the document