Research

Photonics and electromagnetics

I study light propagation with tools borrowed from quantum mechanics and field theory. My work in this direction includes material and structural slow light, nonlinear effects in waveguides, geometric algebra for classical electrodynamics, and optical solitons.

Some relevant publications:

1. FL and L. Salasnich, Dimensional reduction for optical beams with thermal nonlocal nonlinearity, Frontiers of Physics 21, 102203 (2026).

2. FL, M. G. Pelizzo, and L. Salasnich, Variational treatment of the electromagnetic field in an optical cavity with a moving mirror, Journal of Physics: Photonics 8, 015023 (2026).

3. FL, L. Salasnich, and M. G. Pelizzo, Optical cavity in the relativistic regime for laser propulsion, Physical Review Applied 24, 034033 (2025).

4. FL and L. Salasnich, Variational approach to multimode nonlinear optical fibers, Nanophotonics 14, 805-813 (2025).

Optical communications and simulations

I develop implementation-level numerical models for high-throughput optical communications. I focus in particular on realistic noise estimation in systems where classical channels coexist with QKD channels.

Some relevant publications:

1. FL, G. Marcon, L. Schenato, A. Mecozzi, C. Antonelli, and M. Santagiustina, Fast Estimation of Nonlinear Interference Noise in Distributed Raman-Amplified Few-Mode Fiber Links, Journal of Lightwave Technology 44, 4476-4490 (2026).

2. FL, G. Marcon, A. Galtarossa, L. Palmieri, A. Mecozzi, C. Antonelli, and M. Santagiustina, Nonlinear Interference Noise in Raman-Amplified WDM Systems, Journal of Lightwave Technology 41, 6465-6473 (2023).

3. FL, G. Marcon, A. Galtarossa, L. Palmieri, A. Mecozzi, C. Antonelli, and M. Santagiustina, Model for Nonlinear Interference Noise in Raman-amplified WDM Systems, European Conference on Optical Communication (ECOC), 1-4 (2022).

Ultracold quantum gases

I studied nonlinear wave phenomena in ultracold quantum gases, including matter-wave solitons, Josephson oscillations, and quantum scattering theory for ultracold atomic collisions.

Some relevant publications:

1. A. Bardin, FL, and L. Salasnich, Bosonic Josephson junction dynamics: interplay between quantum and thermal fluctuations, arXiv:2604.27809 (2026).

2. R. Cruickshank, FL, A. La Rooij, E. Kerr, T. Hilker, S. Kuhr, L. Salasnich, and E. Haller, Experimental Observation of Single- and Multisite Matter-Wave Solitons in an Optical Accordion Lattice, Physical Review Letters 135, 263404 (2025).
   Featured in APS Physics with P. G. Kevrekidis’s Viewpoint, An Accordion Lattice Playing a Soliton Tune.

3. FL and L. Salasnich, Low-Energy Atomic Scattering: S-Wave Relation Between the Interaction Potential and the Phase Shift, Annalen der Physik 537, e00227 (2025).

4. A. Bardin, FL, and L. Salasnich, Quantum fluctuations in atomic Josephson junctions: the role of dimensionality, New Journal of Physics 26, 013021 (2024).

5. FL and L. Salasnich, Atomic soliton transmission and induced collapse in scattering from a narrow barrier, Scientific Reports 14, 4665 (2024).

6. FL, A. Bardin, and L. Salasnich, On-shell approximation for the s-wave scattering theory, Physical Review A 107, 033325 (2023).

Superfluid effective theories

I also work on effective field-theory descriptions of low-energy superfluid dynamics and on their relation with electromagnetic response.

Some relevant publications:

1. L. Salasnich, M. G. Pelizzo, and FL, Only-phase Popov action: thermodynamic derivation and superconducting electrodynamics, Journal of Physics A: Mathematical and Theoretical 57, 355302 (2024).

Software

Over the years I collected repositories for scientific applications in Julia, Python, Rust, and other languages. They are available on my GitHub profile.