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--- start [2019/12/10 06:03]
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+++ start [2023/11/20 10:57]
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-<box w=99% nodash|**JOB OPENING : Postdoctoral position in quantum foundations** >
+<box w=99% nodash|**JOB OPENING : Postdoctoral position in quantum foundations and information** >
-Applications are invited for a postdoctoral position in quantum foundations. The researcher will work with Dr. Ognyan Oreshkov within the framework of the consortium project “The Quantum Information Structure of Spacetime ([[http://www.qiss.fr|QISS]])”, funded by the John Templeton Foundation. This is a multinational research effort at the intersection of quantum gravity, quantum computing, and quantum foundations, which aims to understand the structure of spacetime from an informational perspective through collaboration between experts from different fields. The position in Brussels will investigate the concept of causal structure in quantum theory, with particular focus on approaches to quantum theory in the absence of predefined causal structure, the notion of causal nonseparability and its relevance at the intersection of quantum mechanics and gravity, as well as the link between causal structure and quantum reference frames.
+Applications are invited for a postdoctoral position in quantum foundations and quantum information. The researcher will work with Dr. Ognyan Oreshkov on topics ranging from entanglement to causal structures and quantum reference frames. The position is for up to two years, finishing at the end of 2025. For application instructions, see [[https://www.quantiki.org/position/postdoctoral-position-quantum-foundations-and-information-ulb|announcement]].
-Please direct informal enquiries to [[oreshkov@ulb.ac.be|Dr. Ognyan Oreshkov]].
+Please direct informal enquiries to [[ognyan.oreshkov@ulb.be|Dr. Ognyan Oreshkov]].
+</box>
+<box w=99% nodash|**Time-delocalised variables violating causal inequalities** (Nature Communications, March 2023)>
+<box left w=125px noborder> {{:time-delocalised.jpg?130|}}
+</box>
+<box right w=80% noborder>
+Julian Wechs and Ognyan Oreshkov from QuIC and Cyril Branciard from the French National Centre for Scientific Research have shown for the first time that an exotic type of process violating causal inequalities can be realised with known physics. A violation of a causal inequality proves under theory-independent assumptions that certain variables in an experiment cannot be assigned a definite causal order. This phenomenon has been known to be possible in theory but widely believed impossible in practice, at least in the known regimes of physics. The new study, published in [[https://www.nature.com/articles/s41467-023-36893-3|Nature Communications]], shows that such processes can be realised in standard quantum mechanics using variables delocalised in time. The finding may have far-reaching implications for our understanding of causality in physics.
+\\
+See [[https://actus.ulb.be/fr/presse/communiques-de-presse/recherche/des-variables-delocalisees-dans-le-temps-allant-a-lencontre-des-inegalites-causales|press release]].
+</box>
 </box>