Generation of tomographic measurement data of mesoscopic quantum states

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F25%3A73631428" target="_blank" >RIV/61989592:15310/25:73631428 - isvavai.cz</a>

Výsledek na webu

<a href="https://opg.optica.org/directpdfaccess/243863e3-e373-4220-86f4b55f4c5ca0a6_574775/opticaq-3-4-360.pdf" target="_blank" >https://opg.optica.org/directpdfaccess/243863e3-e373-4220-86f4b55f4c5ca0a6_574775/opticaq-3-4-360.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OPTICAQ.562217" target="_blank" >10.1364/OPTICAQ.562217</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Generation of tomographic measurement data of mesoscopic quantum states

Popis výsledku v původním jazyce

Microscopic Schrödinger cat states are generated from quantum-correlated fields using a probabilistic heralding photon subtraction event. Subsequent quantum state tomography provides complete information about the state, revealing numbers of quantum-correlated photons of the order of one. Optical quantum computing requires even more sophisticated states with significantly higher photon numbers. Here, we present a concept to derive tomographic “measurement” data of states with average quantum-correlated photon numbers significantly larger than one without having these states available. We generate a photon-subtracted squeezed vacuum state of light and simultaneously measure a pair of orthogonal field quadratures. Subsequent data post-processing emulates the optical interference of two copies. One of the interference results is accepted as the new “measurement” value if the second interference result falls below a threshold value. Evaluating the final tomographic data shows that two iterations of the breeding protocol increase the mean photon number of the state from ≈ 1 to ≈ 4. Our concept for obtaining tomographic measurement data of mesoscopic non-classical states that physically never existed provides a way to benchmark future quantum technologies.

Název v anglickém jazyce

Generation of tomographic measurement data of mesoscopic quantum states

Popis výsledku anglicky

Microscopic Schrödinger cat states are generated from quantum-correlated fields using a probabilistic heralding photon subtraction event. Subsequent quantum state tomography provides complete information about the state, revealing numbers of quantum-correlated photons of the order of one. Optical quantum computing requires even more sophisticated states with significantly higher photon numbers. Here, we present a concept to derive tomographic “measurement” data of states with average quantum-correlated photon numbers significantly larger than one without having these states available. We generate a photon-subtracted squeezed vacuum state of light and simultaneously measure a pair of orthogonal field quadratures. Subsequent data post-processing emulates the optical interference of two copies. One of the interference results is accepted as the new “measurement” value if the second interference result falls below a threshold value. Evaluating the final tomographic data shows that two iterations of the breeding protocol increase the mean photon number of the state from ≈ 1 to ≈ 4. Our concept for obtaining tomographic measurement data of mesoscopic non-classical states that physically never existed provides a way to benchmark future quantum technologies.

Druh

J_ost - Ostatní články v recenzovaných periodicích

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

2025

Kód důvěrnosti údajů

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

Název periodika

Optica Quantum

ISSN

2837-6714

e-ISSN

2837-6714

Svazek periodika

3

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

360-365

Kód UT WoS článku

001564284200004

EID výsledku v databázi Scopus

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