Laboratoire de Physique Théorique
Toulouse - UMR 5152

Directrice de Recherche CNRS

Contact : pina.romaniello@irsamc.ups-tlse.fr

Address : Laboratoire de Physique Théorique, FeRMI, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France

Office : 332 Bâtiment 3R1B4

Phone : +33 (0)5 61 55 75 74

Fax : +33 (0)5 61 55 60 65

ORCID : 0000-0001-8300-8320

EVENTS : workshop Green’s function methods : the next generation 6, Toulouse, 2-4 October

Research Topics and Team

My scientific work can be regrouped into two main research lines :
• Formal developments, implementation, and applications in (time-dependent) density functional theory (DFT)
• Formal developments, implementation, and applications in many-body perturbation theory (MBPT) based on Green’s functions

DFT and MBPT are two state-of-the-art frameworks for the description and prediction of material properties, such as photoemission, optical absorption and metal-insulator transitions. In particular I am interested in the description of strongly correlated materials, which physics is difficult to capture using standard approximations.

• Current team members
  Stefano PAGGI (PhD, ANR)

Stefano has just joined our team for a three year PhD. He will extend the formalism based on the three-body Green’s function derived by Gabriele RIVA for photoemission to other spectroscopies.

• Past team members
• Roberto ORLANDO (PhD)
• Gabriele RIVA (PhD/Postdoc)
• Théodore FISCHER (M1)
• Stefano DI SABATINO (post-doc)
• Emma NOGUE (M2)
• Julien PRODHON (M1)
• Jaakko KOSKELO (post-doc)
• Rubén R. FERRADÁS (post-doc)
• Sarah CAVO (M1)
• Stefano DI SABATINO (PhD)
• Nathaniel RAIMBAULT (PhD)
• Nicolas VICTORIN (L3)
• Nader SLAMA (M2)

Master/PhD projects : Please contact me if you would like to do an internship in my group.

Publications

• Latest publications

Anomalous propagators and the particle-particle channel : Hedin’s equations Antoine Marie, Pina Romaniello, Pierre-François Loos, , Phys. Rev. B 110, 115155 (2024)

Multichannel Dyson equation : derivation and analysis Gabriele Riva, Pina Romaniello, and J. Arjan Berger, Phys. Rev. B 110, 115140 (2024)

• Full list of publications
• Ph.D Thesis
• HDR Thesis

• Strong correlation and nonadiabaticity in TDRDMFT : insights from a two-site Anderson impurity model ; RDM2022, San Sebastian, Spain (2022)
• The N-body problem in condensed matter ; GDR NBODY general meeting, Lille, France (2020)
• Photoemission Spectra beyond GW : The Band Gap in Strongly Correlated Systems ; ETSF workshop on Electronic Excitations, Jena, Germany (2019)
• Correlation and Spectroscopy in Reduced Density Matrix Functional Theory ; CECAM workshop `New challenges in Reduced Density Matrix Functional Theory : Symmetries, time-evolution and entanglement’’, Lausanne, Swizerland (2017)
• Photoemission spectra beyond GW : the band gap in strongly correlated systems ; workshop `Quantum Many-Body Methods in Condensed Matter Systems’, Aachen, Germany (2016)
• Reduced density matrix functionl theory : correlation and spectroscopy ; ICTP : total energy and force methods, Trieste, Italy (2015)
• Determination of the one-body Green’s function : freedom and constraints ; 17th ETSF workshop on Electronic Excitations, Coimbra, Portugal (2012)
• Insights in the T-matrix formalism ; 16th ETSF workshop on Electronic Excitations, Turin, Italy (2011)
• DFT : insight from MBPT ; workshop `DFT : Fundamentals and Applications in Condensed Matter Physics’, Banff, Canada (2011)
• Beyond GW : local and nonlocal vertex corrections ; workshop `From Basic Concepts to Real Materials’, Santa Barbara, USA (2009)
• Double Excitations in Finite Systems ; workshop `Time-Dependent Density Functional Theory : Prospects and Applications’ , Benasque, Spain (2008)