Observation of quantum entanglement with top quarks at the ATLAS detector

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00611757" target="_blank" >RIV/68378271:_____/24:00611757 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21220/24:00382188 RIV/68407700:21240/24:00382188 RIV/68407700:21340/24:00382188 RIV/68407700:21670/24:00382188 and 2 more
Result on the web
<a href="https://hdl.handle.net/11104/0363408" target="_blank" >https://hdl.handle.net/11104/0363408</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41586-024-07824-z" target="_blank" >10.1038/s41586-024-07824-z</a>

Result language
angličtina
Original language name
Observation of quantum entanglement with top quarks at the ATLAS detector
Original language description
Entanglement is a key feature of quantum mechanics1–3, with applications in fields such as metrology, cryptography, quantum information and quantum computation4–8. It has been observed in a wide variety of systems and length scales, ranging from the microscopic9–13 to the macroscopic14–16. However, entanglement remains largely unexplored at the highest accessible energy scales. Here we report the highest-energy observation of entanglement, in top–antitop quark events produced at the Large Hadron Collider, using a proton–proton collision dataset with a centre-of-mass energy of √s = 13 TeV and an integrated luminosity of 140 inverse femtobarns (fb)−1 recorded with the ATLAS experiment. Spin entanglement is detected from the measurement of a single observable D, inferred from the angle between the charged leptons in their parent top- and antitop-quark rest frames. The observable is measured in a narrow interval around the top–antitop quark production threshold, at which the entanglement detection is expected to be significant.
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
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Fundamental constituents of matter through frontier technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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