Interconversion between single-rail and dual-rail photonic qubits

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73581245" target="_blank" >RIV/61989592:15310/17:73581245 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/pra/pdf/10.1103/PhysRevA.95.033802" target="_blank" >https://journals.aps.org/pra/pdf/10.1103/PhysRevA.95.033802</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevA.95.033802" target="_blank" >10.1103/PhysRevA.95.033802</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interconversion between single-rail and dual-rail photonic qubits

Popis výsledku v původním jazyce

We investigate schemes for conversion between qubits encoded into superpositions of vacuum and singlephoton states and qubits encoded into states of single photons. The analyzed schemes combine linear optics, homodyne or heterodyne detection, single-photon detection, and electro-optical feedforward, and are designed to be suitable for signals with arbitrary temporal profiles. To achieve perfect conversion, quantum filtering is utilized based on conditioning on no-clicks of single-photon detectors, which makes the conversion probabilistic. Highquality conditional conversion is nevertheless possible even without single-photon detectors, by conditioning on outcomes of a homodyne or heterodyne detector. Deterministic high-quality conversion of dual-rail qubits to single-rail qubits is possible with an array of homodyne detectors where the phases of the measured quadratures are controlled by a feedforward scheme, which represents an alternative to conversion via homodyne detection with a real-time continuous feedback [T.C. Ralph, A. P. Lund, and H. M. Wiseman, J. Opt. B 7, S245 (2005)].

Název v anglickém jazyce

Interconversion between single-rail and dual-rail photonic qubits

Popis výsledku anglicky

We investigate schemes for conversion between qubits encoded into superpositions of vacuum and singlephoton states and qubits encoded into states of single photons. The analyzed schemes combine linear optics, homodyne or heterodyne detection, single-photon detection, and electro-optical feedforward, and are designed to be suitable for signals with arbitrary temporal profiles. To achieve perfect conversion, quantum filtering is utilized based on conditioning on no-clicks of single-photon detectors, which makes the conversion probabilistic. Highquality conditional conversion is nevertheless possible even without single-photon detectors, by conditioning on outcomes of a homodyne or heterodyne detector. Deterministic high-quality conversion of dual-rail qubits to single-rail qubits is possible with an array of homodyne detectors where the phases of the measured quadratures are controlled by a feedforward scheme, which represents an alternative to conversion via homodyne detection with a real-time continuous feedback [T.C. Ralph, A. P. Lund, and H. M. Wiseman, J. Opt. B 7, S245 (2005)].

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/GA16-17314S" target="_blank" >GA16-17314S: Komplexní multiqubitová optická kvantová logická hradla</a><br>

Návaznosti

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

Rok uplatnění

2017

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

—

Svazek periodika

95

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

"033802-1"-"033802-9"

Kód UT WoS článku

000395981700008

EID výsledku v databázi Scopus

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