Differences

This shows you the differences between two versions of the page.

--- start [2023/11/20 10:28]
oreshkov
+++ start [2023/11/20 10:57]
oreshkov
@@ Line 10: / Line 10: @@
 <box w=99% nodash|**JOB OPENING : Postdoctoral position in quantum foundations and information** >
-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, ending at the end of 2025.
+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 [[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>