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oreshkov
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 Recently, it also has contributed to establish the fundamental limit on the transmission rate via Gaussian bosonic channels (the quantum extension of Shannon's famous channel capacity formula), and has discovered a quantum two-photon interference effect in the amplification of light akin to the Hong-Ou-Mandel effect.
-It currently holds two patents, and has published numerous scientific papers, among which two in the journal //Nature//, one in //Nature Physics//, two in //Nature Photonics//, and two in //Nature Communications//.
+It currently holds two patents, and has published numerous scientific papers, among which two in the journal //Nature//, one in //Nature Physics//, two in //Nature Photonics//, and three in //Nature Communications//.
 //Nicolas J. Cerf, group leader.//
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 <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?150|}}
+</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>
+<box w=99% nodash|**Cyclic quantum causal models** (Nature Communications, February 2021)>
+<box left w=125px noborder> {{:causalloops.jpg?150|}}
+</box>
+<box right w=80% noborder>
+Now researchers from the University of Oxford and the Université libre de Bruxelles have developed a theory of causality in quantum theory, according to which cause-effect relations can sometimes form cycles. This theory offers a novel understanding of exotic processes in which events do not have a definite causal order. The study has been published in [[https://www.nature.com/articles/s41467-020-20456-x|Nature Communications]].
+\\
+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>