Tootfinder

Hinweis an Nicht-Berliner:
Was die #taz hier unfairerweise unterschlägt, ist der Sachverhalt, dass auch in Berlins Haushalt frostige Kälte herrscht (sogenannte klamme Kassen 😆) und dem Regierenden #Bürgermeister gar kein

Lectures on entanglement, von Neumann algebras, and emergence of spacetime
Hong Liu
https://arxiv.org/abs/2510.07017 https://arxiv.org/pdf/2510.07017

Lectures on entanglement, von Neumann algebras, and emergence of spacetime
We review recent developments in the use of von Neumann algebras to analyze the entanglement structure of quantum gravity and the emergence of spacetime in the semi-classical limit. Von Neumann algebras provide a natural framework for describing quantum subsystems when standard tensor factorizations are unavailable, capturing both kinematic and dynamical aspects of entanglement. The first part of the review introduces the fundamentals of von Neumann algebras, including their classification, a…

Clifford testing: algorithms and lower bounds
Marcel Hinsche, Zongbo Bao, Philippe van Dordrecht, Jens Eisert, Jop Bri\"et, Jonas Helsen
https://arxiv.org/abs/2510.07164 ht…

Clifford testing: algorithms and lower bounds
We consider the problem of Clifford testing, which asks whether a black-box $n$-qubit unitary is a Clifford unitary or at least $\varepsilon$-far from every Clifford unitary. We give the first 4-query Clifford tester, which decides this problem with probability $\mathrm{poly}(\varepsilon)$. This contrasts with the minimum of 6 copies required for the closely-related task of stabilizer testing. We show that our tester is tolerant, by adapting techniques from tolerant stabilizer testing to our se…

Phase structure of a holographic topological superconductor beyond the probe limit
Hoang Van Quyet
https://arxiv.org/abs/2510.05941 https://arxiv.org/pdf/2…

Phase structure of a holographic topological superconductor beyond the probe limit
We investigate tricritical phase transitions in a holographic model of topological superconductivity using Einstein-Maxwell gravity coupled with a charged scalar field in Anti-de Sitter spacetime. By incorporating both gravitational backreaction and quartic self-interaction $V(ϕ) = λϕ^4$, we demonstrate that the system exhibits both second-order and first-order phase transitions separated by a tricritical point at $(q_{\mathrm{tri}},T_{\mathrm{tri}})=(2.00\pm0.02,0.1521\pm0.0003)$ in the $(q…