Direct detection of quantum non-Gaussian light from a dispersively coupled single atom

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73612474" target="_blank" >RIV/61989592:15310/22:73612474 - isvavai.cz</a>

Výsledek na webu

<a href="https://quantum-journal.org/papers/q-2022-02-24-660/pdf/" target="_blank" >https://quantum-journal.org/papers/q-2022-02-24-660/pdf/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22331/q-2022-02-24-660" target="_blank" >10.22331/q-2022-02-24-660</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Direct detection of quantum non-Gaussian light from a dispersively coupled single atom

Popis výsledku v původním jazyce

Many applications in quantum communication, sensing and computation need provably quantum non-Gaussian light. Recently such light, witnessed by a negative Wigner function, has been estimated using homodyne tomography from a single atom dispersively coupled to a high-finesse cavity [17]. This opens an investigation of quantum non-Gaussian light for many experiments with atoms and solid-state emitters. However, at their early stage, an atom or emitter in a cavity system with different channels to the environment and additional noise are insufficient to produce negative Wigner functions. Moreover, homodyne detection is frequently challenging for such experiments. We analyse these issues and prove that such cavities can be used to emit quantum non-Gaussian light employing single-photon detection in the Hanbury Brown and Twiss configuration and quantum non-Gaussianity criteria suitable for this measurement. We investigate in detail cases of considerable cavity leakage when the negativity of the Wigner function disappears completely. Advantageously, quantum non-Gaussian light can be still conclusively proven for a large set of the cavity parameters at the cost of overall measurement time, even if noise is present.

Název v anglickém jazyce

Direct detection of quantum non-Gaussian light from a dispersively coupled single atom

Popis výsledku anglicky

Many applications in quantum communication, sensing and computation need provably quantum non-Gaussian light. Recently such light, witnessed by a negative Wigner function, has been estimated using homodyne tomography from a single atom dispersively coupled to a high-finesse cavity [17]. This opens an investigation of quantum non-Gaussian light for many experiments with atoms and solid-state emitters. However, at their early stage, an atom or emitter in a cavity system with different channels to the environment and additional noise are insufficient to produce negative Wigner functions. Moreover, homodyne detection is frequently challenging for such experiments. We analyse these issues and prove that such cavities can be used to emit quantum non-Gaussian light employing single-photon detection in the Hanbury Brown and Twiss configuration and quantum non-Gaussianity criteria suitable for this measurement. We investigate in detail cases of considerable cavity leakage when the negativity of the Wigner function disappears completely. Advantageously, quantum non-Gaussian light can be still conclusively proven for a large set of the cavity parameters at the cost of overall measurement time, even if noise is present.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Quantum

ISSN

2521-327X

e-ISSN

2521-327X

Svazek periodika

6

Číslo periodika v rámci svazku

FEB

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

13

Strana od-do

1-13

Kód UT WoS článku

000761913700001

EID výsledku v databázi Scopus

2-s2.0-85127080260