Physicist · Researcher

Leonardo Ermann

Argentine physicist specializing in Quantum Chaos, Complex Networks, and Quantum Information. Head of the Department of Theoretical Physics at CNEA and Independent Researcher at CONICET.

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About me

I am an Argentine physicist working at the intersection of quantum mechanics, chaos theory, and complex systems. My research explores how classical chaos manifests in quantum systems and how information propagates through complex networks.

I hold a PhD in Physical Sciences from the Universidad de Buenos Aires (UBA, 2009) and conducted postdoctoral research at the Laboratoire de Physique Théorique (Université Paul Sabatier, Toulouse) in collaboration with Prof. Dima Shepelyansky, with numerous subsequent guest researcher stays.

In 2012 I was a Science writer for Canal Encuentro's "Proyecto G" program (5 episodes, 5M+ YouTube views).

PhD Universidad de Buenos Aires (2009)
Licenciatura Universidad de Buenos Aires (2005)
Postdoc Univ. Paul Sabatier, Toulouse (2009–2011)
Award Stimulus Prize – ANCEFN (2019)
Papers 58 in international journals
Languages Spanish, English (advanced), French (intermediate)
Phone (+54) 11 6772 7055

Research interests

My work spans several interconnected areas of theoretical and computational physics:

Quantum Chaos Semiclassics Transport Phenomena Complex Networks Complex Systems Quantum Information Decoherence Classical–Quantum Transition Nano & Mesoscopic Systems Google Matrix Analysis Bose-Einstein Condensates

Current positions

Head of Department of Theoretical Physics of Fundamental Interactions and Complex Systems

Gerencia Investigación y Aplicaciones "Laboratorio TANDAR" (CAC) · CNEA · Buenos Aires, Argentina

Since March 2013

Independent Researcher – CIC

National Scientific and Technical Research Council (CONICET) · Argentina

Since March 2013 (promoted to Independent Nov. 2020)

Adjunct Professor

IIB-ECyT · National University of San Martín (UNSAM) · Buenos Aires, Argentina

Since May 2019

Academic training

2005–2009

PhD in Physical Sciences

Universidad de Buenos Aires · Director: Prof. Marcos Saraceno
Disipación, transporte y localización en cadenas periódicas de mapas cuánticos caóticos

1999–2005

Licenciado en Ciencias Físicas

Universidad de Buenos Aires · Director: Prof. Marcos Saraceno

2009–2011

Postdoctoral Researcher

Laboratoire de Physique Théorique, UMR 5152 du CNRS – Université Paul Sabatier, Toulouse, France
Quantum Coherence Group (Prof. D. Shepelyansky)

Publications & output

Scientific papers

2019

Stimulus Prize – ANCEFN

5M+

YouTube views (Canal Encuentro)

Recent and selected publications:

58. Boltzmann-Loschmidt dispute reloaded quantum 150 years later submitted L. Ermann, A.D. Chepelianskii, D.L. Shepelyansky · Physical Review Letters

56. Dynamical thermalization, Rayleigh–Jeans condensate, vortexes and wave collapse in quantum chaos fibers and fluid of light L. Ermann, A.D. Chepelianskii, D.L. Shepelyansky · J. Phys. A: Math. Theor. 59 055702 (2026)

55. Opinion Formation in Wikipedia Ising Networks L. Ermann, K.M. Frahm, D.L. Shepelyansky · Information 16(9), 782 (2025)

54. Ideal Gas Law for a Quantum Particle A.M.F. Rivas, E. Vergini, L. Ermann, G.G. Carlo · Phys. Rev. E 112, 014223 (2025)

35. Kolmogorov turbulence defeated by Anderson localization for a Bose-Einstein condensate in a Sinai-oscillator trap L. Ermann, E. Vergini, D.L. Shepelyansky · Phys. Rev. Lett. 119, 054103 (2017)

29. Google matrix analysis of directed networks L. Ermann, K.M. Frahm, D.L. Shepelyansky · Rev. Mod. Phys. 87, 1261 (2015)

7. Localization of resonance eigenfunction on quantum repellers L. Ermann, G.G. Carlo, M. Saraceno · Phys. Rev. Lett. 103, 054102 (2009)

Google Scholar arXiv 📁 Paper Repository (Drive)

Grants & funding

2022–2024

PIP CONICET – Principal Investigator

PIP:11220210100208CO · Complejidad clásica y cuántica

2019–2022

PICT – FONCYT – Principal Investigator

PICT-2018-02331 · Estudio del Caos y Aplicaciones a Sistemas de Comunicaciones Digitales

2017–2020

T-AP Trans-Atlántica "Digging into Data"

Understanding opinion and language dynamics using massive data

2015–2017

PICT Agencia – Junior Investigator

PICT-2014-2243 · Transporte y redes complejas

2009–2011

ANR–CNRS Postdoctoral Fellowship

Projet NANOTERRA · Toulouse, France

2005–2009

CONICET Doctoral Fellowship (Type I)

Buenos Aires, Argentina