Quantum process tomography of a high-dimensional quantum communication channel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73594689" target="_blank" >RIV/61989592:15310/19:73594689 - isvavai.cz</a>

Výsledek na webu

<a href="https://quantum-journal.org/papers/q-2019-05-06-138/" target="_blank" >https://quantum-journal.org/papers/q-2019-05-06-138/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22331/q-2019-05-06-138" target="_blank" >10.22331/q-2019-05-06-138</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantum process tomography of a high-dimensional quantum communication channel

Popis výsledku v původním jazyce

The characterization of quantum processes, e.g. communication channels, is an essential ingredient for establishing quantum information systems. For quantum key distribution protocols, the amount of overall noise in the channel determines the rate at which secret bits are distributed between authorized partners. In particular, tomographic protocols allow for the full reconstruction, and thus characterization, of the channel. Here, we perform quantum process tomography of high-dimensional quantum communication channels with dimensions ranging from 2 to 5. We can thus explicitly demonstrate the effect of an eavesdropper performing an optimal cloning attack or an interceptresend attack during a quantum cryptographic protocol. Moreover, our study shows that quantum process tomography enables a more detailed understanding of the channel conditions compared to a coarse-grained measure, such as quantum bit error rates. This full characterization technique allows us to optimize the performance of quantum key distribution under asymmetric experimental conditions, which is particularly useful when considering high-dimensional encoding schemes.

Název v anglickém jazyce

Quantum process tomography of a high-dimensional quantum communication channel

Popis výsledku anglicky

The characterization of quantum processes, e.g. communication channels, is an essential ingredient for establishing quantum information systems. For quantum key distribution protocols, the amount of overall noise in the channel determines the rate at which secret bits are distributed between authorized partners. In particular, tomographic protocols allow for the full reconstruction, and thus characterization, of the channel. Here, we perform quantum process tomography of high-dimensional quantum communication channels with dimensions ranging from 2 to 5. We can thus explicitly demonstrate the effect of an eavesdropper performing an optimal cloning attack or an interceptresend attack during a quantum cryptographic protocol. Moreover, our study shows that quantum process tomography enables a more detailed understanding of the channel conditions compared to a coarse-grained measure, such as quantum bit error rates. This full characterization technique allows us to optimize the performance of quantum key distribution under asymmetric experimental conditions, which is particularly useful when considering high-dimensional encoding schemes.

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

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Quantum

ISSN

2521-327X

e-ISSN

—

Svazek periodika

3

Číslo periodika v rámci svazku

MAY

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

13

Strana od-do

138-150

Kód UT WoS článku

000467883000001

EID výsledku v databázi Scopus

—