COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring. |

University of Cambridge > Talks.cam > Theoretical Physics Colloquium > Quantum Non-Locality in Networks

## Quantum Non-Locality in NetworksAdd to your list(s) Download to your calendar using vCal - Nicolas Gisin, University of Geneva, Switzerland
- Thursday 19 October 2023, 14:15-15:15
- MR2.
If you have a question about this talk, please contact Sergii Strelchuk. Quantum non-locality, i.e. the violation of some Bell inequality, has proven to be an extremely useful concept in analyzing entanglement, quantum randomness and cryptography, among others. In particular, it led to the fascinating field of device-independent quantum information processing. Historically, the idea was that the particles emitted by various quantum sources carry additional variables, known as local hidden variables. The more modern view, strongly influenced by computer science, refers to these additional variables as shared randomness. This, however, leads to ambiguity when there is more than one source, as in quantum networks. Should the randomness produced by each source be considered as fully correlated, as in most common analyses, or should one analyze the situation assuming that each source produces independent randomness, closer to the historical spirit? The latter is known, for the case of n independent sources, as n-locality. For example, in entanglement swapping there are two sources, hence “quantumness” should be analyzed using 2-locality (or, equivalently, bi-locality). The situation when the network has loops is especially interesting. Recent results for triangular networks will be presented. Another result is that some quantum networks can’t be described by real-number Hilbert spaces. This talk is part of the Theoretical Physics Colloquium series. ## This talk is included in these lists:- All CMS events
- All Talks (aka the CURE list)
- CMS Events
- Cosmology lists
- Cosmology, Astrophysics and General Relativity
- DAMTP info aggregator
- HEP web page aggregator
- Interested Talks
- Kavli Institute for Cosmology Talk Lists
- MR2
- Priscilla
- Theoretical Physics Colloquium
- bld31
Note that ex-directory lists are not shown. |
## Other listsNicky-minaj-net-worth Ageing Research One Day Meeting - Third Annual Symposium of the Cambridge Computational Biology Institute## Other talksResearch Software Engineering in the Arts and Humanities : a community-driven approach When Art meets Psychology Youth Work in an Unsettled and Affectively Charged Setting Lunch at Moller Institute Machine Learning Here and Now mTORC1, inter-organ communication and adaptation of lipid metabolism during catch-up growth of the long bones |