Nondestructive detector for exchange symmetry of photonic qubits

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73587586" target="_blank" >RIV/61989592:15310/18:73587586 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41534-018-0087-x.pdf" target="_blank" >https://www.nature.com/articles/s41534-018-0087-x.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41534-018-0087-x" target="_blank" >10.1038/s41534-018-0087-x</a>

Result language
angličtina
Original language name
Nondestructive detector for exchange symmetry of photonic qubits
Original language description
We experimentally realize a quantum Fredkin gate and use it for constructing a nondestructive detector of exchange symmetry for qubits. The detector, which discriminates between symmetric and anti-symmetric quantum states of two qubits, allows us to directly measure a purity and overlap of quantum states and implement a quantum state programmable measurement. Furthermore, the nondestructive nature of the detector can be used for analysis of the back-action of the measurements, as well as for realization of nonlinear quantum operations, such as quantum purification and quantum cloning. As a whole, the experiment demonstrates the utility of exchange symmetry measurements and their potential for multi-step characterization and processing of quantum states.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

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
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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