Author: Lisa

Pietro presented the Mid-Term Report of the QuantERA Project T-NiSQ at the QuantERA Strategic Conference 2024, held in Amsterdam (Netherlands) on the 24th and 25th of September

Francesco attended the “Non-equilibrium quantum many-body systems” workshop in Genova, organised by Prof. Dario Ferraro and Prof. Maura Sassetti, presenting his recent work on singlet fission in extended media.

Il Ministero delle Imprese e del Made in Italy – Direzione generale per le nuove tecnologie abilitanti, in un’ottica partecipativa e di coinvolgimento degli stakeholders, intende consultare operatori di mercato attivi nelle applicazioni industriali e produttive delle tecnologie quantistiche. L’ambito di analisi della consultazione riguarda, in particolare, le principali tecnologie quantistiche in un contesto di progettazione, sviluppo, assemblaggio ed uso, prendendo in esame anche l’aspetto componentistico per quanto riguarda i principali pilastri di applicazione: comunicazione quantistica; sensoristica e metrologia quantistica; computazione quantistica; simulazione quantistica. I contributi e le comunicazioni in risposta all’avviso di consultazione possono essere inviati entro il termine dell’11 luglio 2024 all’indirizzo e-mail: DGTEC@mise.gov.it Documenti Consultazione pubblica in materia di tecnologie quantistiche (docx) Informazioni sul trattamento dei dati personali (docx) Ufficio competente Direzione generale per le nuove tecnologie abilitanti Ulteriori informazioni Per ulteriori informazioni consultate il sito ufficiale del Ministero delle Imprese e del Made in Italy.

Rocco and Asmita attended a workshop on machine learning organized by AQTIVATE for PhD research fellows, from February 12th to March 1st at the Technical University of Berlin. The fellows actively participated in training sessions covering advanced machine learning techniques and applications. The combination of lectures and hands-on tutorials was very useful to help the fellows advance their research and stay informed on the latest developments in machine learning.

Rocco and Asmita attended the AQTIVATE workshop on ”Exascale computing and scalable algorithms” in Stockholm between 27 November 2023 and 14 December 2023 with 13 other AQTIVATE PhD research fellows. They had the opportunity to be trained on topics including theoretical and practical aspects in the design of scalable algorithms for exascale High-Performance Computing; their adoption for linear solvers, eigensolvers and fundamental simulation algorithms; introduction to computer architectures, performance engineering and GPU programming.

We are glad to announce that the call for admission to the 40th cycle of our PhD Courses is now officially open! Detailed information and instructions can be accessed through the provided link. Kindly note that the deadline for submitting applications is May 13th at 1:00 PM. Should you require any further clarification or assistance, please do not hesitate to reach out to our dedicated PhD Office via email at phd.application@unipd.it. Best regards

Solving quantum impurity problems with matrix-product states in the temporal domain We introduce an efficient method to simulate dynamics of an interacting quantum impurity coupled to non-interacting fermionic reservoirs, based on a matrix-product state (MPS) representation of the reservoirs’ Feynman-Vernon influence functionals (IF). The efficiency of such representation rests on the moderate entanglement of the IF viewed as a “temporal state”, dubbed temporal entanglement (TE). By analytically studying TE for a general class of reservoir’s initial states, we establish that for initial states with finite-range correlations TE obeys an area law, whereas Fermi-sea-type initial states yield logarithmic scaling of TE with time, closely related to the scaling of real-space entanglement in (1+1)-dimensional conformal field theory. Hence, we describe an explicit algorithm for converting the IF temporal state to an optimal MPS form, which can be subsequently contracted with arbitrary impurities with modest effort. We apply our method to quantum quenches and transport in a single- and multi-level impurity Anderson model, including highly non-equilibrium setups, and find favorable performance compared to state-of-the-art methods. The polynomial scaling of computational resources required for an accurate computation of dynamics indicates that a broad class of out-of-equilibrium quantum impurity problems are efficiently solvable.

From the 3rd to the 8th of March, Alice and Daniel attended the American Physical Society’s March Meeting 2024 in Minneapolis, a scientific research conference convening 13,000 physicists and students from around the world to connect and collaborate across academia, industry, and major labs. Check out thier slides [1, 2] for the March meeting on quantum optimal control and Rydberg atoms.