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"Quantum Science and Technology: State-of-the-art and Perspectives"

December 4th, 2023
BICOCCA Campus, Aula Sironi, U4 building, Piazza della Scienza 3, Milano

Invited speakers:

- Markus Aspelmeyer, University of Vienna & Austrian Academy of Sciences
- Fabio Beltram, Scuola Normale Superiore Pisa
- Simone Gasparinetti, Chalmers University of Technology
- Sven Hӧfling, University of  Würzburg
- Lorenzo Pavesi, University of  Trento

Precision Metrology with Photons, Phonons and Spins: Answering Major Unsolved Problems in Physics and Advancing Translational Science

Mike Tobar
(Quantum Technologies and Dark Matter Research Laboratory,
University of Western Australia)

Friday 30th June 2023 11:00 CEST
Dip. di Scienze Ambientali, Aula Marchetti, U1-07
Università di Milano-Bicocca

Abstract and material

The Quantum Technologies and Dark Matter research laboratory has a rich history of developing precision tools, including the development and application of novel low-loss and highly sensitive resonant photonic and phononic cavities, such as whispering gallery and re-entrant cavities, as well as photonic band gap and bulk acoustic wave structures. These cavities have been used in a range of applications, including highly stable low noise classical and atomic oscillators, low noise measurement systems, highly sensitivity displacement sensors, high precision electron spin resonance and spin-wave spectroscopy, high precision measurement of material properties and applications of low-loss quantum hybrid systems, which are strongly coupled to form polaritons or quasi-particles. Translational applications have included the realization of the lowest noise oscillators and systems for advance radar, the enabling of high accuracy atomic clocks and sensitive transducers for precision measurements.

Meanwhile, there is currently a world-wide renascence to adapt precision and quantum measurement techniques to major unsolved problems in physics and discover “Beyond Standard Model” physics. Our technology has been adapted to realize precision measurement tools and techniques to test some of these core aspects of fundamental physics, such as low energy searches for wave-like dark matter, test of quantum gravity from the possible modification of the Heisenberg uncertainty principle, the search for high frequency gravitational waves, Lorentz invariance violations in the photon, phonon and gravity sectors and possible variations in fundamental constants. An overview of our current experimental program will be presented, including status, recent experiments, and future directions.

indico - slides - video recording

SMART-electron Colloquium on Quantum Control of Electrons
for Advanced Microscopies and Spectroscopies 

September 4-8, 2023
Politecnico di Milano in Milano (Italy)

This innovative colloquium aims to explore the paradigm shift in Electron Microscopy, moving beyond high-resolution imaging and spectra to harness the quantum nature of electrons for advanced imaging methods and spectroscopic tools. By discussing electron-beam shaping and coherent wave function engineering, participants will gain insights into new research possibilities in condensed matter and nano-photonics.

The SMART-electron Colloquium will take place within the 30th General Conference of the Condensed Matter Division of the European Physical Society (EPS), held jointly with FisMat, the biennial conference of the Italian community of condensed matter physics, optics, liquids, and soft matter (

Surface states in HgTe and α-Sn semimetals in various topological regimes

Alexander Khaetskii
(NRC/AFRL, Wright-Patterson AFB, Ohio, USA)

Wednesday 27 July 2022 11:00 CEST
Dipartimento di Scienze dei Materiali, U5
Università di Milano-Bioocca
Seminar Room 1st floor

Abstract and material

We revisit the problem of surface states in semiconductors with inverted-band structures, such as α-Sn and HgTe. We unravel the confusion that arose over the past decade regarding the origin of the surface states, their topological nature, and the role of strain. Within a single minimalistic description, we reconcile different solutions found in the 1980s with the results obtained from modern-day numerical simulations, allowing us to unambiguously identify all branches of surface states around the Г point of the Brillouin zone in different regimes.

We consider biaxial in-plane strain that is either tensile or compressive, leading to different branches of surface states for topological insulators (TIs) and Dirac semimetals (DSMs), respectively. We show that in TI regime strain is a smooth deformation to the surface states not leading to any drastic change of the physical properties in these materials, in contrast to what has recently been advanced in the literature. In DSM regime, however, strain strongly changes the surface state spectrum.

We have also considered the surface states in HgTe material under an in-plane compressive strain and taking into account a bulk inversion asymmetry, which leads to a nodal-line-semimetal regime. Again, these results are qualitatively different from the ones previously published.

Our model can help in interpreting numerous experiments on topological surface states originating from inverted-band semiconductors.

slides - video recording

Prof. Massimo Porrati
(New York University, USA)

Wednesday 19th January 2022, 15:30
Università di Milano-Bioocca
Piazza della Scienza 3, Building U1
room U1 - 01

Abstract and material

After a brief review of the main points of continuous photodetection measurement theory we will investigate a system made of an "artificial atom," a transmon qubit, in a resonant cavity. By treating the cavity as a quantum system, we will present a new short-time regime of the quantum evolution and a  new fast qubit readout scheme, different from heterodyne readout and potentially competitive with it. We will also show how a proper treatment of the measurement process dramatically affects the dynamics of a 3-level atom (or a  3-state transmon) by creating a "quantum telegraph" effect, in which long quiescent periods with no photon emissions alternate with bright periods. 

poster - slides - video recording

Prof. Fabrizio Illuminati
(Università di Salerno, Italia)

Monday 4 October 2021 16:00 CEST
Dipartimento di Scienze dei Materiali, U5
Università di Milano-Bioocca
Seminar Room 1st floor

Abstract and material

Quantum entanglement comes in a variety of different forms and measures with different conceptual and operational interpretations. In this talk I will review some of the most relevant definitions of entanglement, the different physical effects that they characterize, and their use in the study of quantum many-body systems and models of quantum statistical mechanics.

slides - video recording


Web Workshop SemiconNano 2021 

August 30th-September 3rd

The broad and vibrant field of semiconductor nanostructures produces significant breakthroughs in semiconductor technology where Moore's law hits quantum mechanics. Nanostructured semiconductor materials exhibit fascinating new physical properties, which can be applied to quantum devices and technologies. 

The first three days of the workshop are dedicated to different aspects of quantum materials and technologies

Visit the workshop web site: