15 September 2025
Paper: F. Pastawski, B. Yoshida, D. Harlow, J. Preskill: Holographic quantum error-correcting codes: toy models for the bulk/boundary correspondence link
By Péter Lévay
29 September 2025
Paper: A. Bassi, K. Lochan, S. Satin, T. P. Singh, H. Ulbricht: Models of wave-function collapse, underlying theories, and experimental tests link part I, II, and III/B
By Máté Lencsés
6 October 2025
Paper: A. Tilloy: General quantum-classical dynamics as measurement based feedback link
By Antoine Tilloy (online)
13 October 2025
Paper: J. Taylor, P. McCulloh: Wavefunction branching: when you can’t tell pure states from mixed states link
By Tibor Rakovszky
20 October 2025
Paper: TBD
By TBD
27 October 2025
Paper: JM. A. Allen, J. Barrett, D. C. Horsman, C. M. Lee, R. W. Spekkens: Quantum Common Causes and Quantum Causal Models link
By Szilárd Szalay
3 November 2025
Paper: N. Ormrod, J. Barrett: Quantum influences and event relativity link
By Nick Ormrod (online)
10 November 2025
Paper: TBD
By TBD
17 November 2025
Paper: D. Schmid, K. Ried, R. W. Spekkens: Why initial system-environment correlations do not imply the failure of complete positivity: A causal perspective link
By David Schmid (online)
24 November 2025
Title: Approximately decoherent histories
Abstract: The decoherent histories condition is in one-to-one correspondence with records about past events in an isolated quantum system and as such is essential to study the many worlds (and related) interpretations. Alas, this is only true for exactly decoherent histories, but in reality interesting non-trivial histories are only approximately decoherent. In this talk we delve deeper into the topic of approximate decoherence assuming a Hilbert space of finite dimension D. We reveal that there are >> D many approximately decoherent histories, whereas observers inside the Multiverse can only reliably distinguish << D many records. To investigate the latter we define the "selflocation problem" as a coherent version of quantum state discrimination. Eventually, this conundrum leads to a "branch selection problem". If time permits we will also discuss the structure of decoherence between different branches of the Multiverse based on a numerical example.
By Philipp Strasberg (online)
1 December 2025
Paper: J. Riedel: Wavefunction branches demand a definition link
By Jess Riedel (online)
8 December 2025
Title: Resurgence I
Paper: TBD
By István Vona
15 December 2025
Title: Resurgence II
Paper: TBD
By István Vona
8 September 2025
Paper: C. Emary, N. Lambert, F. Nori: Leggett–Garg inequalities link
By Márton Kormos
Add new papers here
B. Ferté, D. Farci, X. Cao: Decoherent histories with(out) objectivity in a (broken) apparatus link
CJ. Riedel: Classical Branch Structure from Spatial Redundancy in a Many-Body Wave Function link
C. Overstreet, P. Asenbaum, J. Curti, M. Kim, M. Kasevich: Observation of a gravitational Aharonov-Bohm effect link
W. Zurek: Consensus About Classical Reality in a Quantum Universe link
D. Carney, M. Karydas, T. Scharnhorst, R. Singh, J. Taylor: On the quantum mechanics of entropic forces link
R. Blume-Kohout, W. Zurek: A Simple Example of “Quantum Darwinism”: Redundant Information Storage in Many-Spin Environments link
F. Brandao, M. Piani, P. Horodecki: Generic emergence of classical features in quantum Darwinism link
R. Blume-Kohout, H. Ng, D. Poulin, L. Viola: Information-preserving structures: A general framework for quantum zero-error information link
J. Cotler, G. Penington, D. Ranard: Locality from the spectrum link
C-J. Cao: From Quantum Codes to Gravity: A Journey of Gravitizing Quantum Mechanics link
S. Carroll, A. Singh: Quantum mereology: Factorizing Hilbert space into subsystems with quasiclassical dynamics link
E. Doucet, S. Deffner: Compatibility of quantum measurements and the emergence of classical objectivity link
B. Ferté, X. Cao: Solvable model of quantum Darwinism-encoding transitions link
X-L Qi, D. Ranard: Emergent classicality in general multipartite states and channels link
G. Lindblad: Decoherence properties of finite quantum systems link
G. Higgens, A. Di Biagio, M. Christodoulou: A truly relativistic gravity mediated entanglement protocol using superpositions of rotational energies link
L. Diósi: A healthier stochastic semiclassical gravity: world without Schrödinger cats link
F. Giacomini, E. Castro-Ruiz, C. Brukner: Quantum mechanics and the covariance of physical laws in quantum reference frames link
H. Ollivier: Emergence of Objectivity for Quantum Many-Body Systems link
A. Touil, F. Anza, S. Deffner, JP Crutchfield: Branching States as The Emergent Structure of a Quantum Universe link
P. Figueroa-Romero, K. Modi, and FA. Pollock: Almost Markovian processes from closed dynamics link