Quantum process tomography of a high-dimensional quantum communication channel
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Quantum process tomography of a high-dimensional quantum communication channel
Original language description
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.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Quantum
ISSN
2521-327X
e-ISSN
—
Volume of the periodical
3
Issue of the periodical within the volume
MAY
Country of publishing house
AT - AUSTRIA
Number of pages
13
Pages from-to
138-150
UT code for WoS article
000467883000001
EID of the result in the Scopus database
—