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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F23%3A73619924" target="_blank" >RIV/61989592:15310/23:73619924 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/pra/abstract/10.1103/PhysRevA.108.023730" target="_blank" >https://journals.aps.org/pra/abstract/10.1103/PhysRevA.108.023730</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevA.108.023730" target="_blank" >10.1103/PhysRevA.108.023730</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

Assessing whether a quantum state ˆρ 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 ˆρ. 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 experimental procedure for directly accessing this quantity with a simple linear interferometer involving two replicas (independent and identical copies) of the state ˆρ supplemented with photon-number-resolving measurements. This finding, which 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

Assessing whether a quantum state ˆρ 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 ˆρ. 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 experimental procedure for directly accessing this quantity with a simple linear interferometer involving two replicas (independent and identical copies) of the state ˆρ supplemented with photon-number-resolving measurements. This finding, which 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/8C20002" target="_blank" >8C20002: Short-Range Optical Quantum Connections</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

PHYSICAL REVIEW A

ISSN

2469-9926

e-ISSN

2469-9934

Svazek periodika

108

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

"023730-1"-"023730-11"

Kód UT WoS článku

001063028100001

EID výsledku v databázi Scopus

2-s2.0-85172691352