Interference of Single Photons Emitted by Entangled Atoms in Free Space

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73587258" target="_blank" >RIV/61989592:15310/18:73587258 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.120.193603" target="_blank" >https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.120.193603</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.120.193603" target="_blank" >10.1103/PhysRevLett.120.193603</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interference of Single Photons Emitted by Entangled Atoms in Free Space

Popis výsledku v původním jazyce

The generation and manipulation of entanglement between isolated particles has precipitated rapid progress in quantum information processing. Entanglement is also known to play an essential role in the optical properties of atomic ensembles, but fundamental effects in the controlled emission and absorption from small, well-defined numbers of entangled emitters in free space have remained unobserved. Here we present the control of the emission rate of a single photon from a pair of distant, entangled atoms into a free-space optical mode. Changing the length of the optical path connecting the atoms modulates the single-photon emission rate in the selected mode with a visibility V = 0.27 = +/- 0.03 determined by the degree of entanglement shared between the atoms, corresponding directly to the concurrence C-p = 0.31 +/- 0.10 of the prepared state. This scheme, together with population measurements, provides a fully optical determination of the amount of entanglement. Furthermore, large sensitivity of the interference phase evolution points to applications of the presented scheme in high-precision gradient sensing.

Název v anglickém jazyce

Interference of Single Photons Emitted by Entangled Atoms in Free Space

Popis výsledku anglicky

The generation and manipulation of entanglement between isolated particles has precipitated rapid progress in quantum information processing. Entanglement is also known to play an essential role in the optical properties of atomic ensembles, but fundamental effects in the controlled emission and absorption from small, well-defined numbers of entangled emitters in free space have remained unobserved. Here we present the control of the emission rate of a single photon from a pair of distant, entangled atoms into a free-space optical mode. Changing the length of the optical path connecting the atoms modulates the single-photon emission rate in the selected mode with a visibility V = 0.27 = +/- 0.03 determined by the degree of entanglement shared between the atoms, corresponding directly to the concurrence C-p = 0.31 +/- 0.10 of the prepared state. This scheme, together with population measurements, provides a fully optical determination of the amount of entanglement. Furthermore, large sensitivity of the interference phase evolution points to applications of the presented scheme in high-precision gradient sensing.

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/GB14-36681G" target="_blank" >GB14-36681G: Centrum excelence pro klasické a kvantové interakce v nanosvětě</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

—

Svazek periodika

120

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

"193603-1"-"193603-5"

Kód UT WoS článku

000432991900006

EID výsledku v databázi Scopus

2-s2.0-85047721927