Name: NOBEL SYMPOSIUM 215 — Beyond Boltzmann: Complexity, Memory, and Non-Additive Entropies
Start: 2027-05-24T15:30:00+02:00
End: 2027-05-28T17:35:00+02:00
Location: Bäckaskog slott

NOBEL SYMPOSIUM 215 — Beyond Boltzmann: Complexity, Memory, and Non-Additive Entropies

from Monday, 24 May 2027 (15:30) to Friday, 28 May 2027 (17:35)

Monday, 24 May 2027

15:30 Registration and arrival
Registration and arrival
15:30 - 16:00
Room: Reception
16:00 Opening reception and Lund University welcome - Erik Renström (Lund University, Vice-Chancellor)
Opening reception and Lund University welcome
- Erik Renström (Lund University, Vice-Chancellor)
16:00 - 17:00
Room: Reception Opening reception, hosted by Roman Pasechnik and Constantino Tsallis. Welcome address by Vice-Chancellor Erik Renström at approximately 16:15.
17:15 Coach transfer: Lund → Bäckaskog slott
Coach transfer: Lund → Bäckaskog slott
17:15 - 18:45
Room: Coach departure

19:30 Welcome dinner — end time indicative
Welcome dinner — end time indicative
19:30 - 21:00
Room: Conference room
Tuesday, 25 May 2027

08:45 Welcome and scientific opening
Welcome and scientific opening
08:45 - 09:15
Room: Conference room Introduction to the scientific aims, programme and discussion format.
09:15 S1 · Foundations and admissible generalized entropies: Chair to be confirmed · Rapporteur: Tamás S. Biró
Chair to be confirmed · Rapporteur: Tamás S. Biró
09:15 - 13:30
Room: Conference room
Contributions

09:15 From Boltzmann–Gibbs to nonadditive entropies: foundations, scope and decisive tests - Constantino Tsallis (CBPF)

10:00 Superstatistics and the dynamical emergence of q-statistics - Christian Beck (Queen Mary University of London)

10:30 Universality classes and generalized entropies for complex, nonergodic systems - Stefan Thurner (Medical University of Vienna / CSH)

11:00 S1 discussion 1

12:00 Group entropies and the classification of admissible entropic functionals - Piergiulio Tempesta (Universidad Complutense de Madrid / ICMAT)

12:30 Nonequilibrium statistical mechanics foundations of nonextensive statistical mechanics - Evaldo M. F. Curado (CBPF)

13:00 S1 discussion 2
13:30 Lunch
Lunch
13:30 - 14:30
Room: Conference room
14:30 S2 · Weak chaos, memory and anomalous transport: Chair: Andrea Rapisarda · Rapporteur: Henrik Johannesson
Chair: Andrea Rapisarda · Rapporteur: Henrik Johannesson
14:30 - 18:30
Room: Conference room
Contributions

14:30 The edge of chaos: renormalization-group dynamics and q-statistics

15:00 The Importance of Tsallis Thermostatistics in the Study of 1-dimensional Hamiltonian Lattices - Anastasios Bountis (University of Patras)

15:30 Universality and q-statistical limit laws in low-dimensional maps - Uğur Tirnakli (İzmir University of Economics)

16:00 S2 discussion 1

17:00 Anomalous Diffusion Beyond Boltzmann–Gibbs - Celia Anteneodo (PUC-Rio)

17:30 Nonlinear Fokker–Planck equations and anomalous nonextensive dynamics

18:00 S2 discussion 2
19:30 Dinner — end time indicative
Dinner — end time indicative
19:30 - 21:00
Room: Conference room
Wednesday, 26 May 2027
09:00 S3 · Many-body systems, turbulence and granular matter: Chair: Anastasios Bountis · Rapporteur: Alessandro Pluchino
Chair: Anastasios Bountis · Rapporteur: Alessandro Pluchino
09:00 - 13:00
Room: Conference room
Contributions

09:00 Superstatistics, intermittency and circulation fluctuations in turbulence

09:30 q-Gaussian spectral crossovers in correlated systems: glasses and random matrices - Abbas Ali Saberi (Constructor University)

10:00 S3 discussion 1

11:00 Experimental nonextensive scaling in confined granular matter - Gaël Combe (Université Grenoble Alpes)

11:30 Long-range Hamiltonian systems: quasi-stationary states and anomalous dynamics - Andrea Rapisarda (University of Catania)

12:00 First-principles q-statistics in turbulent plasmas: from kinetic theory to spacecraft verification - Peter H. Yoon (University of Maryland)

12:30 S3 discussion 2
13:00 Lunch
Lunch
13:00 - 14:00
Room: Conference room
14:00 S4 · Nonextensivity in particle physics: Chair: Roman Pasechnik · Rapporteur: Bo-Sture Skagerstam
Chair: Roman Pasechnik · Rapporteur: Bo-Sture Skagerstam
14:00 - 17:30
Room: Conference room
Contributions

14:00 Thermofractals, QCD self-similarity and nonextensive hadron thermodynamics - Airton Deppman (University of São Paulo)

14:30 Heavy tails and Tsallis phenomenology in high-energy collisions and femtoscopy - Tamás Csörgő (HUN-REN Wigner RCP / MATE)

15:00 S4 discussion 1

16:00 From nonextensive ideal gases to group entropy: finite phase space and the formal logarithm - Tamás S. Biró (HUN-REN Wigner RCP)

16:30 Nonextensive transport in hot and magnetized QCD matter - Sadhana Dash (IIT Bombay)

17:00 S4 discussion 2
17:45 Early-career researcher forum
Early-career researcher forum
17:45 - 18:50
Room: Conference room Three-minute presentations by early-career observers, followed by questions and feedback from senior participants. Coordinator: Alessandro Pluchino.

19:30 Dinner — end time indicative
Dinner — end time indicative
19:30 - 21:00
Room: Conference room
Thursday, 27 May 2027
09:00 S5 · Quantum information, black holes and cosmology: Chair: Bo-Sture Skagerstam · Rapporteur: Ángel Luis Plastino
Chair: Bo-Sture Skagerstam · Rapporteur: Ángel Luis Plastino
09:00 - 13:00
Room: Conference room
Contributions

09:00 Generalized entropy, gravity and cosmology: consistency and observational tests - Petr Jizba (Czech Technical University in Prague)

09:30 Universality classes and thermodynamics of group entropies: extensivity, composability and black holes - Henrik J. Jensen (Imperial College London)

10:00 Quantum Tsallis and Rényi entropies: continuity, coherence and information constraints - Anna Vershynina (University of Houston)

10:30 S5 discussion 1

11:30 Nonadditive holographic dark energy and current cosmological constraints

12:00 Holographic Rényi entropies: generalized information measures from black-hole thermodynamics

12:30 S5 discussion 2
13:00 Lunch
Lunch
13:00 - 14:00
Room: Conference room
14:00 S6 · AI and data-rich complex systems beyond traditional physics: Chair: Tiziana Di Matteo · Rapporteur: Henrik J. Jensen
Chair: Tiziana Di Matteo · Rapporteur: Henrik J. Jensen
14:00 - 18:00
Room: Conference room
Contributions

14:00 Tsallis α-entropies in machine learning: entmax, sparse attention and Fenchel–Young losses - André F. T. Martins (Instituto Superior Técnico / IT)

14:30 Nonlinear dynamics and machine learning for prediction in complex systems - Ying-Cheng Lai (Arizona State University)

15:00 S6 discussion 1

16:00 Invited contribution — title and speaker to be confirmed

16:30 Heavy tails and scaling in data-rich ecosystems: financial markets, company transaction networks and gut microbiome - Misako Takayasu (Institute of Science Tokyo)

17:00 Nonextensive statistical seismology: criticality, hazards and decisive observables - Filippos Vallianatos (National and Kapodistrian University of Athens)

17:30 S6 discussion 2
18:00 Group photo and optional guided walk
Group photo and optional guided walk
18:00 - 18:45
Room: Conference room

19:30 Symposium banquet — end time indicative
Symposium banquet — end time indicative
19:30 - 21:00
Room: Banquet
Friday, 28 May 2027

09:00 Six rapporteur summaries
Six rapporteur summaries
09:00 - 09:50
Room: Conference room About eight minutes per session: points of agreement, unresolved alternatives, proposed tests and priorities. Rapporteurs: Tamás S. Biró (S1), Henrik Johannesson (S2), Alessandro Pluchino (S3), Bo-Sture Skagerstam (S4), Ángel Luis Plastino (S5) and Henrik J. Jensen (S6).

09:50 Coffee break
Coffee break
09:50 - 10:20
Room: Conference room

10:20 Scientific Synthesis Round Table
Scientific Synthesis Round Table
10:20 - 11:35
Room: Conference room Common language, decisive tests and priorities for the years ahead, including whether “non-extensivity” remains the appropriate shared term when extensivity is restored in generalized variables. The Scientific Synthesis Panel integrates the six rapporteur syntheses. Moderator: Roman Pasechnik. Scientific Secretary: Tiziana Di Matteo, recording agreements, unresolved alternatives, tests and actions.

11:35 Symposium Statement: plenary consideration and adoption
Symposium Statement: plenary consideration and adoption
11:35 - 11:50
Room: Conference room Plenary consideration and adoption of a short closing text prepared by the Scientific Synthesis Panel from the six rapporteur syntheses and the Round Table. The Statement will inform the planned open-access Symposium Report.

11:50 Closing remarks
Closing remarks
11:50 - 12:00
Room: Conference room The closed scientific programme ends at noon.

12:00 Early lunch
Early lunch
12:00 - 12:40
Room: Conference room

12:45 Coach transfer: Bäckaskog → Science Village / Lund
Coach transfer: Bäckaskog → Science Village / Lund
12:45 - 14:15
Room: Coach departure

14:15 Optional ESS / MAX IV visit — facility to be confirmed
Optional ESS / MAX IV visit — facility to be confirmed
14:15 - 15:15
Room: Facility to be confirmed

15:45 Public lecture: doors open and Swedish fika
Public lecture: doors open and Swedish fika
15:45 - 16:15
Room: Venue to be confirmed
16:15 What is Entropy? - Constantino Tsallis (CBPF)
What is Entropy?
- Constantino Tsallis (CBPF)
16:15 - 17:15
Room: Venue to be confirmed Public lecture by Constantino Tsallis, separate from the closed scientific symposium. Venue, admission arrangements and the Lund University introduction will be announced when confirmed.
17:15 Public questions and farewell - Constantino Tsallis (CBPF)
Public questions and farewell
- Constantino Tsallis (CBPF)
17:15 - 17:35
Room: Venue to be confirmed Questions following the public lecture and farewell.

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