Mathematical Challenges in Quantum Mechanics - Online Seminars

Europe/Rome
Online

Online

Description

The series of online seminars Mathematical Challenges in Quantum Mechanics (MCQM) focuses on current topics of mathematical physics,  with special attention to the mathematical aspects of quantum mechanics. It aims to bring together the Italian community working on mathematical methods for quantum theory.      

The seminars take place on Wednesday afternoon, usually at 14:15 Italian time, on a monthly basis. The schedule of the 2024 seminar series is:       
 

Each seminar will be accompanied by a lecture addressed to PhD students and young researchers, aimed at introducing the broad topic of the seminar and presenting some perspectives of the open problems and mathematical challenges in the field. The lecture will be held on the same day of the seminar, at 11.30 Italian time.

Titles and abstracts of the MCQM Seminars and PhD lectures are available at this page and this page respectively. To receive the zoom link to attend the seminars and/or the PhD lectures please register here

The online seminars are part of a long-running series of events organized over the years by the Italian community working on mathematical methods for quantum physics, including the following School and Workshops: 

MCQM - Mathematical Challenges in Quantum Mechanics  
MCQM22 - Como, June 13-18, 2022 
MCQM18 - Rome, February 19-24, 2018  
MCQM16 - Bressanone, February 8-13, 2016


Organizing committee

Serena Cenatiempo (GSSI)     
Marco Falconi (PoliMi)     
Emanuela L. Giacomelli (LMU)     
Domenico Monaco (Sapienza)     
Marco Olivieri (Copenhagen)

Registration
Registration to MCQM Seminars
Participants
  • ADECHOLA EMILE KODJO KOUANDE
  • Aldo Clemente
  • Alessandra Faggionato
  • Alessandro Ferreri
  • Alessandro Olgiati
  • Anouar Kouraich
  • Antoine Levitt
  • Arnaud Triay
  • Asbjørn Bækgaard Lauritsen
  • Benjamin Hinrichs
  • Bruno Colbois
  • Camilo Gómez Araya
  • Carlo Presilla
  • Chiara Boccato
  • Claudio Cacciapuoti
  • Cornelia Vogel
  • Cristina Caraci
  • Daniele Ferretti
  • Danko Aldunate
  • David Miguélez Caballero
  • Davide Desio
  • Denis Périce
  • Dirk Hundertmark
  • Domenico Lapadula
  • Domenico Monaco
  • Eliana Fiorelli
  • Emanuela L. Giacomelli
  • Fabio Briscese
  • Fabrizio Caragiulo
  • Feng He
  • François Visconti
  • Fumio Hiroshima
  • Gabriele Grillo
  • Gabriele Peluso
  • Ghofrane Bel Hadj Aissa
  • Gianluca Panati
  • Giovanna Marcelli
  • Giovanni Franzina
  • Giulia Basti
  • Giuseppe Gaeta
  • Giuseppe Lipardi
  • Giuseppe MARMO
  • Graziano Surace
  • Harman Preet Singh
  • Horia Cornean
  • Jakob Oldenburg
  • Javier Valentín Martín
  • Jinyeop Lee
  • Jonas Lampart
  • Konstantin Merz
  • LAKHDAR SEK
  • Lakshita Bageja
  • Leonardo Goller
  • Loredana Mihaela Vasiloiu
  • Luca Fresta
  • Lucrezia Cossetti
  • Mangaldeep Paul
  • Marco Falconi
  • Marco Olivieri
  • Maria-Myrto Pegioudi
  • Massimo Moscolari
  • Matias Ginzburg
  • Matteo Gallone
  • Meriem Bahhi
  • Michele Correggi
  • Nepomuk Trauner
  • Nico Michele Schiavone
  • Nils Schopohl
  • Paolo Facchi
  • Per Moosavi
  • Pierfrancesco Martini
  • Raphaël Gautier
  • Riccardo Panza
  • Sangdon Jin
  • Saptarshi Mandal
  • Serena Cenatiempo
  • Siegfried Spruck
  • Simone Rademacher
  • SIVASISH PAUL
  • Stefano Marcantoni
  • Thiago Carvalho Corso
  • Tim Möbus
  • Tommaso Pistillo
  • Umberto Morellini
  • Vishnu Sanjay
  • William Borrelli
  • Yair Mulian
  • +97
    • 11:30 AM 12:30 PM
      MCQM PhD Lecture: Angela Capel Cuevas 1h

      Title: Quantum entropy and trace inequalities

      Abstract: In this talk, I will give an elementary introduction to the subject of quantum entropies and trace inequalities, with a special focus on results that are relevant to quantum information theory. First, we will discuss various different notions of quantum entropies that extend those of classical entropies, and we will show several of their fundamental properties, in particular under the application of quantum channels. We will put a special focus on those properties that differ from their classical counterparts. Next, we will describe some contexts within quantum Shannon theory in which the use of quantum entropies is fundamental, such as for quantum hypothesis testing or to estimate quantum channel capacities.

    • 2:15 PM 3:15 PM
      MCQM Seminar: Nilanjana Datta 1h

      Title: Universal proofs of entropic continuity bounds via majorization flow

      Abstract: We employ majorization theory to obtain a powerful tool for deriving simple and universal proofs of continuity bounds for various entropies which are relevant in information theory. In obtaining this, we first state a more general result which may be of independent interest: a necessary and sufficient condition under which a state maximizes a concave, continuous, Gateaux-differentiable function in an epsilon-ball in trace distance. Examples of such a function include the von Neumann entropy, Renyi entropies, and the conditional entropy. In particular, by introducing a notion of majorization flow, we prove that the alpha-Rényi entropy is Lipschitz continuous, for alpha greater than 1, thus resolving an open problem and providing a substantial improvement over previously known bounds. This is joint work with Eric Hanson.

    • 11:30 AM 12:30 PM
      MCQM PhD Lecture: Stefano Marcantoni (Université Côte d'Azur, LJAD) 1h

      Title: Introduction to the theory of open quantum systems

      Abstract: In this lecture, I will introduce the framework commonly used to describe the dynamics of open quantum systems. This is based on completely positive dynamical maps and markovian master equations in GKSL (Gorini-Kossakowski-Sudarshan-Lindblad) form. I will discuss the general structure of the latter for an N-level system and present some simple examples. Among them, I will focus on the so-called "Davies generator" induced by the interaction with a thermal Bose field, whose rigorous derivation was originally given by Davies in the van Hove scaling limit and has been recently improved by Merkli uniformly in time. Finally, I will also mention a few directions of current research and point to some relevant literature.

    • 2:15 PM 3:15 PM
      MCQM Seminar: Marco Merkli (Memorial University of Newfoundland) 1h

      Title: Open quantum system dynamics and metastability

      Abstract: We consider the paradigmatic model of an open quantum system, an N-level system in contact with a thermal Bose field (reservoir) and study the evolution of the system-reservoir complex. We show that under suitable conditions the ubiquitous Born and Markov approximations -- that is, the markovian master equation -- can be proven to hold on all time scales. In case there is correlation between the system and the reservoir in the initial state, our results show that the markovian master equation is still valid, that the correlations decay in time and that after the decay, the Born approximation becomes valid. We will explain the results first and then present the main ideas of the mathematical methods used to show them. We will focus in particular on the dynamical resonance theory, which describes the effective dynamics of the N-level system in terms of metastable states (slowly decaying in time) arising from perturbation of unstable bound states of the non-interacting system-reservoir complex.

    • 11:30 AM 12:30 PM
      MCQM PhD Lecture: Ian Jauslin (Rutgers University) 1h

      Title: Typicality in Statistical Mechanics and the arrow of time

      Abstract: In this lecture, I will give a brief overview of the foundations of statistical mechanics, with a focus on typicality in classical settings, and hint at generalizations to the quantum setting. I will also discuss open problems in equilibrium statistical mechanics.

    • 2:15 PM 3:15 PM
      MCQM Seminar: Hal Tasaki (Gakushuin University) 1h

      Title: What is thermal equilibrium and how do we get there? --- Typicality and thermalization in isolated macroscopic quantum systems

      Abstract: I discuss the foundation of equilibrium statistical mechanics based on the quantum mechanics of isolated macroscopic systems. After clarifying what the equilibrium statistical mechanics is all about, I will present the modern understanding that thermal equilibrium should be regarded as a property (or a collection of properties) that an overwhelming majority of legitimate physical states share. This typicality picture is supported by firm mathematical considerations and (in my opinion) now has been accepted by a majority of experts. I will then turn to the much more difficult (and largely unsolved) question of thermalization, i.e., the approach to thermal equilibrium by means of the quantum-mechanical unitary time evolution. I will discuss general scenarios of thermalization based on the ETH (energy eigenstate thermalization hypothesis) or the hypothesis of a large effective dimension. I will finally discuss my recent result with Naoto Shiraishi on a fully rigorous example of thermalization in (unfortunately) a free fermion chain. The main part of the talk is based on the work of various authors. The references can be found in the following two papers of ours. https://arxiv.org/abs/1507.06479 https://arxiv.org/abs/2310.18880.

    • 11:30 AM 12:30 PM
      MCQM PhD Lecture: David Mitrouskas (ISTA Austria) 1h

      TBA

    • 2:15 PM 3:15 PM
      MCQM Seminar: Fumio Hiroshima (Kyushu University) 1h

      TBA

    • 11:30 AM 12:30 PM
      MCQM PhD Lecture: Lea Boßmann (Johannes Gutenberg Universität Mainz) 1h

      Title: A brief introduction to the interacting Bose gas

      Abstract: Since the first experimental realization of a Bose-Einstein condensate in 1995, the physical and mathematical analysis of the Bose gas has become a very active field of research. In this lecture, I will give a short introduction to the topic from a mathematical perspective. I will focus on spectral properties of interacting Bose gases, in particular on their ground state energy and low-energy excitation spectrum.

    • 2:15 PM 3:15 PM
      MCQM Seminar: Søren Fournais (University of Copenhagen) 1h

      Title: The dilute Bose gas at positive temperature

      Abstract: In this talk, I will report on recent work concerning the free energy of the dilute Bose gas in the case of strong interactions. In particular hard sphere potentials are allowed. When combining recent progress on Neumann bracketing for this many-body problem with the “completion-of-the-square” approach used previously on the hard-sphere case at zero-temperature, one obtains a short and simple proof of a lower bound for the free energy in the dilute limit up to temperatures of magnitude ρ a. Here ρ is the particle density and a is the scattering length of the interaction. This is joint work with T. Girardot, L. Junge, L. Morian, M. Olivieri, and A. Triay.

    • 11:30 AM 12:30 PM
      MCQM PhD Lecture: Jonas Lampart (Université de Bourgogne) 1h

      Title: Contact interactions and generalised boundary conditions

      Abstract: Hamiltonians for a particle interacting with a point-like obstacle can be constructed as self-adjoint extensions of the Laplacian restricted to functions vanishing near the obstacle. These are characterised by a generalised boundary condition. They can be embedded into a larger family of Hamiltonians that also allow the particle to be absorbed or emitted at the obstacle.
      After explaining these elementary constructions in detail, I will outline some generalisations to non-relativistic models in quantum field theory.

    • 2:15 PM 3:15 PM
      MCQM Seminar: Alessandro Teta (Sapienza Università di Roma) 1h

      Title: Many-particle systems with contact interactions

      Abstract: Quantum Hamiltonians with contact (or zero-range) interactions are useful models to analyze the behaviour of quantum systems at low energy in different contexts. In this talk we discuss recent mathematical results on the construction of such Hamiltonians for a system of $N \geq 3$ interacting bosons in dimension three as self-adjoint and lower bounded operators in the appropriate Hilbert space. We will also show the connection with a previous result obtained by Albeverio, Hoegh-Krohn and Streit in 1977 and we will discuss possible applications to the Efimov effect.
      The talk is based on a series of works in collaboration with G. Basti, C. Cacciapuoti, D. Ferretti, R. Figari, D. Finco and H. Saberbaghi.

    • 11:30 AM 12:30 PM
      MCQM PhD Lecture: Christian Brennecke (Universität Bonn) 1h

      Title: An Introduction to the SK Model, Classical and Quantum

      Abstract: In this talk, I give an introduction to the classical SK model and some of its variants, including a quantum version with a transverse field. I discuss basics on replica symmetry breaking, the Parisi formula and some open questions related to the RS-RSB transition. The goal of the talk is to prepare the audience for a detailed discussion of a quantum version of the Parisi formula.

    • 2:15 PM 3:15 PM
      MCQM Seminar: Simone Warzel (Technische Universität München) 1h

      Title and abstract: TBA