Probabilistic storage and retrieval of qubit phase gates
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26230%2F20%3APU138929" target="_blank" >RIV/00216305:26230/20:PU138929 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14330/20:00118502
Result on the web
<a href="https://journals.aps.org/pra/abstract/10.1103/PhysRevA.102.032618" target="_blank" >https://journals.aps.org/pra/abstract/10.1103/PhysRevA.102.032618</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.102.032618" target="_blank" >10.1103/PhysRevA.102.032618</a>
Alternative languages
Result language
angličtina
Original language name
Probabilistic storage and retrieval of qubit phase gates
Original language description
Probabilistic storage and retrieval (PSR) of unitary quantum dynamics is possible with exponentially small failure probability with respect to the number of systems used as a quantum memory [PRL 122, 170502 (2019)]. Here we study improvements due to a priori knowledge about the unitary transformation to be stored. In particular, we study N -> 1 PSR of qubit phase gates, i.e. qubit rotations a round Z axis with an unknown angle, and show that if we access the gate only N-times, the optimal probability of perfect retrieving of its single use is N/(N+1). We propose a quantum circuit realization for the optimal protocol and show that programmable phase gate [PRL 88, 047905 (2002)] can be turned into (2^k-1)-> 1 optimal PSR of phase gates and requires only k CNOT gates, while having exponentially small failure probability in k.
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
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
<a href="/en/project/LQ1602" target="_blank" >LQ1602: IT4Innovations excellence in science</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review A
ISSN
2469-9926
e-ISSN
2469-9934
Volume of the periodical
102
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
1-8
UT code for WoS article
000573650200009
EID of the result in the Scopus database
2-s2.0-85092549982