Experimental investigation of heralded Gaussification of phase-randomized coherent states of light

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F24%3A73626862" target="_blank" >RIV/61989592:15310/24:73626862 - isvavai.cz</a>

Výsledek na webu

<a href="https://opg.optica.org/directpdfaccess/c13710d1-be58-4e07-9aafc874156effdf_564962/oe-32-26-45582.pdf" target="_blank" >https://opg.optica.org/directpdfaccess/c13710d1-be58-4e07-9aafc874156effdf_564962/oe-32-26-45582.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OE.539787" target="_blank" >10.1364/OE.539787</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental investigation of heralded Gaussification of phase-randomized coherent states of light

Popis výsledku v původním jazyce

Probabilistic heralded Gaussification of quantum states of light is an important ingredient of protocols for distillation of continuous variable entanglement and squeezing. An elementary step of the heralded Gaussification protocol consists of interference of two copies of the state at a balanced beam splitter, followed by conditioning on the outcome of a suitable Gaussian quantum measurement on one output mode. When iterated, the protocol either converges to a Gaussian state or diverges. Here, we report on experimental investigation of the convergence properties of iterative heralded Gaussification. We experimentally implement two iterations of the protocol, which requires simultaneous processing of four copies of the input state. We utilize the phase-randomized coherent states as the input states, which greatly facilitates the experiment because these states can be generated deterministically, and their mean photon number can easily be tuned. We comprehensively characterize the input and partially Gaussified states by balanced homodyne detection and quantum state tomography. Our experimental results are in good agreement with theoretical predictions and they provide new insights into the convergence properties of heralded quantum Gaussification.

Název v anglickém jazyce

Experimental investigation of heralded Gaussification of phase-randomized coherent states of light

Popis výsledku anglicky

Probabilistic heralded Gaussification of quantum states of light is an important ingredient of protocols for distillation of continuous variable entanglement and squeezing. An elementary step of the heralded Gaussification protocol consists of interference of two copies of the state at a balanced beam splitter, followed by conditioning on the outcome of a suitable Gaussian quantum measurement on one output mode. When iterated, the protocol either converges to a Gaussian state or diverges. Here, we report on experimental investigation of the convergence properties of iterative heralded Gaussification. We experimentally implement two iterations of the protocol, which requires simultaneous processing of four copies of the input state. We utilize the phase-randomized coherent states as the input states, which greatly facilitates the experiment because these states can be generated deterministically, and their mean photon number can easily be tuned. We comprehensively characterize the input and partially Gaussified states by balanced homodyne detection and quantum state tomography. Our experimental results are in good agreement with theoretical predictions and they provide new insights into the convergence properties of heralded quantum Gaussification.

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/GA21-23120S" target="_blank" >GA21-23120S: Kvantové filtry pro přípravu optických kvantových stavů a operací</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

OPTICS EXPRESS

ISSN

1094-4087

e-ISSN

—

Svazek periodika

32

Číslo periodika v rámci svazku

26

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

45582-45599

Kód UT WoS článku

001391432200005

EID výsledku v databázi Scopus

2-s2.0-85212580212