Quantum Applications Workshop 2026

Session

Frontiers of Physics

26 Feb 2026, 14:30

Lecture hall 5

13. Quantum Entanglement Beyond Kinematics: A Dynamical Hypothesis in (3,2)-Dimensional Spacetime

Prof. Marco Pettini

26/02/2026, 14:30

Oral

Quantum entanglement exhibits nonlocal correlations that lack a known local dynamical explanation. While standard quantum theory predicts these correlations with high accuracy, it does not specify \emph{how} they are mediated between distant systems. Building on our previous work of Ref.~\cite{PRR} proposing an underlying process in an extended spacetime with an additional timelike coordinate,...

5. Quantum Sensing for Particle Physics: the NAMASSTE R&D Project

Giuseppe Latino (Istituto Nazionale di Fisica Nucleare)

26/02/2026, 14:55

Oral

Abstract

Answering the most puzzling questions in fundamental physis drives a continuous quest for the development of new detection techniques which may allow to go beyond the limits of traditional measurement approaches. On this purpose, an increasing R&D activity investigating new detection strategies based on exploiting the extreme sensitivity of quantum systems is currently ongoing,...

3. Quantum effective action for the Josephson dynamics

Luca Salasnich (University of Padova and INFN)

26/02/2026, 15:20

Oral

We study the beyond-mean-field Josephson dynamics of the relative phase between two coupled macroscopic quantum systems. Using a covariant background field method, we derive the one-loop only-phase quantum effective action and the corresponding equation of motion for the quantum average of the phase. These analytical results are benchmarked against the exact quantum dynamics of the two-site...

6. Improving VQE Ground State Accuracy via Soft-Coded Orthogonal Subspace Representations

Mr Marco Intini (Università di Pisa, INFN Pisa)

26/02/2026, 15:45

Oral

In this talk, we present a new approach to improve the accuracy of ground state approximations in Variational Quantum Eigensolver (VQE) algorithms. We employ subspace representations where orthogonality is enforced via "soft-coded" constraints within the cost function, rather than "hard-coded" at the circuit level.

Similar to other subspace-based methods like Subspace-Search VQE (SSVQE) and...

19. Universal Properties and Phase Diagrams of Quantum Long-Range Systems

Prof. Andrea Trombettoni (University of Trieste & INFN)

27/02/2026, 15:40

Oral

Several recent experiments in atomic, molecular and optical systems motivated a huge interest in the study of quantum long-range spin systems, following a long-standing interest in classical interacting long-range systems. The goal of the talk is to present a general description of the critical behavior and phases of long-range systems. In the first part I will first discuss and review results...

15. Entanglement Properties of Quantum Complex Networks

Lucio De Simone (University of Siena - INFN Perugia)

27/02/2026, 16:05

Oral

Graph states play a central role in quantum information science, providing a unifying framework for measurement–based quantum computation, quantum error correction, and the study of many–body entanglement. When a graph structure is used to prescribe a set of pairwise interactions among qubits, the resulting state captures how the connectivity pattern influences the generation and distribution...

16. Multipartite entanglement generation in inflationary scenarios

Alessio Belfiglio (University of Camerino)

27/02/2026, 16:30

Oral

We explore novel generation of genuine multipartite entanglement in the context of cosmological inflation. In particular, we apply standard perturbative techniques to quantify entanglement production, focusing on the recently proposed Entanglement Distance, which introduces a geometric interpretation of quantum correlations in terms of the Fubini-Study metric. We first discuss how multipartite...

14. Entanglement Distance: A Geometric Framework for Efficient Multipartite Entanglement Estimation

Lorenzo Capra (Università degli Studi di Siena)

27/02/2026, 16:55

Oral

Quantum entanglement is a foundational resource in quantum information theory, yet its characterization in multipartite systems remains a significant open challenge. In this talk, we investigate entanglement from a geometric perspective, focusing on the Riemannian structure induced by the Fubini–Study metric on the projective Hilbert space of multi-qubit states. By exploiting the local-unitary...

11. Decoherence mitigation via repeated joint weak measurements in entangled two-qubit register

Oleksandr Konovalenko (O.Ya. Usikov Institute for Radiophysics and Electronics)

27/02/2026, 17:20

Oral

In practical quantum processors, residual coupling to uncontrolled environmental degrees of freedom unavoidably induces decoherence, washing out phase relations and progressively destroying entanglement, which are key resources for quantum sensing and computation [1,2]. We report the results of further development of the approach proposed in [3], which suppresses decoherence in an entangled...