Protocols and quantum circuits for implementing entanglement concentration in cat state, GHZ-like state and nine families of 4-qubit entangled states

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F15%3A33154404" target="_blank" >RIV/61989592:15310/15:33154404 - isvavai.cz</a>
Result on the web
<a href="http://link.springer.com/article/10.1007%2Fs11128-015-0948-6" target="_blank" >http://link.springer.com/article/10.1007%2Fs11128-015-0948-6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11128-015-0948-6" target="_blank" >10.1007/s11128-015-0948-6</a>

Result language
angličtina
Original language name
Protocols and quantum circuits for implementing entanglement concentration in cat state, GHZ-like state and nine families of 4-qubit entangled states
Original language description
Three entanglement concentration protocols (ECPs) are proposed. The first ECP and a modified version of that are shown to be useful for the creation of maximally entangled cat and GHZ-like states from their non-maximally entangled counterparts. The lasttwo ECPs are designed for the creation of maximally entangled (n + 1)-qubit state 1/root 2 (vertical bar Psi(0)>vertical bar 0 > + vertical bar Psi(1)>vertical bar 1 >) from the partially entangled (n + 1)-qubit normalized state alpha vertical bar Psi(0)>vertical bar(0)> + beta vertical bar Psi(1)>vertical bar 1 >, where <Psi(1)vertical bar Psi(0)> = 0 and vertical bar alpha vertical bar not equal 1/root 2. It is also shown that W, GHZ, GHZ-like, Bell and cat states and specific states from the nine SLOCC-nonequivalent families of 4-qubit entangled states can be expressed as 1/root 2 (vertical bar Psi(0)>vertical bar 0 > + vertical bar Psi(1)>vertical bar 1 >), and consequently, the last two ECPs proposed here are applicable to all thes
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BH - Optics, masers and lasers
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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