Quantum technologies

24 Jan 2024 (1h 00m)

Fabio Beltram - Course (teaching activity) - Face to face

Presentazione corso e incontro con allievi

30 Jan 2024 (2h 00m)

Leonardo Fallani - Course (teaching activity) - Online

Introduzione alla tecnologie quantistiche con atomi neutri, interazione atomo-luce, raffreddamento laser.

06 Feb 2024 (2h 00m)

Leonardo Fallani - Course (teaching activity) - Online

Orologi atomici e interferometri atomici.

13 Feb 2024 (2h 00m)

Leonardo Fallani - Course (teaching activity) - Online

Simulatori quantistici con atomi neutri.

20 Feb 2024 (2h 00m)

Leonardo Fallani - Course (teaching activity) - Face to face

Computer quantistici con atomi neutri.

27 Feb 2024 (2h 00m)

Fabio Sciarrino - Course (teaching activity) - Both face to face and online

First lecture of module on photonics quantum technologies Photonic quantum technologies represent a promising platform for several applications, ranging from long-distance communications to the simulation of complex phenomena. Indeed, the advantages offered by single photons do make them the candidate of choice for carrying quantum information in a broad variety of areas with a versatile approach. Furthermore, recent technological advances are now enabling first concrete applications of photonic quantum information processing. The goal of the first lecture is to provide the reader with a comprehensive overview of the state of the art in this active field, with a focus on the integrated photonics platform.

28 Feb 2024 (1h 00m)

Fabio Beltram - Course (teaching activity) - Face to face

Heterostrutures and modulation doping

28 Feb 2024 (2h 00m)

Fabio Sciarrino - Course (teaching activity) - Both face to face and online

Second lectureof module on photonics quantum technologiesThe technology of integrated quantum photonics has enabled the generation, processing and detection of quantum states of light at an increasing scale and level of complexity, progressing from few-component circuitry occupying centimetre-scale footprints and operating on two photons, to programmable devices with integrated generation of multiphoton states. This lecture summarizes the advances in integrated photonic quantum technologies and its demonstrated applications, including quantum communications,sampling algorithms, and linear-optic quantum information processing.

12 Mar 2024 (2h 00m)

Fabio Sciarrino - Course (teaching activity) - Both face to face and online

Third lecture of module on photonics quantum technologies Boson sampling is a computational problem that has recently been proposed as a candidate to obtain an unequivocal quantum computational advantage. The problem consists in sampling from the output distribution of indistinguishable bosons in a linear interferometer. There is strong evidence that such an experiment is hard to classically simulate, but it is naturally solved by dedicated photonic quantum hardware, comprising single photons, linear evolution, and photodetection. In this lecture a thorough theoretical description of Boson Sampling has been provided.

13 Mar 2024 (2h 00m)

Fabio Beltram - Course (teaching activity) - Face to face

Heterostrutures: quantum wells and resonant tunneling

19 Mar 2024 (2h 00m)

Fabio Sciarrino - Course (teaching activity) - Both face to face and online

Fourth lecture of module on photonics quantum technologies We review recent advances in photonic boson sampling, describing both the technological improvements achieved and the future challenges. We also discuss recent proposals and implementations of variants of the original problem, theoretical issues occurring when imperfections are considered, and advances in the development of suitable techniques for validation of boson sampling experiments. We conclude by discussing the future application of photonic boson sampling devices beyond the original theoretical scope.

20 Mar 2024 (2h 00m)

Fabio Beltram - Course (teaching activity) - Face to face

Perpendicular transport in SL and MQW

26 Mar 2024 (2h 00m)

Fabio Taddei - Course (teaching activity) - Face to face

Introduction to superconducting circuits and superconducting qubits. Review of the basic notions of superconductivity, Josephson junctions and the SQUID. Introduction to the phase qubit.

09 Apr 2024 (2h 00m)

Fabio Taddei - Course (teaching activity) - Face to face

The phase qubit: circuit, equation for the phase dynamics, classical Lagrangian, canonical quantization. The two-level system in the cubic phase potential, qubit manipulation and read out.

16 Apr 2024 (2h 00m)

Fabio Taddei - Course (teaching activity) - Face to face

The charge qubit: equivalent circuit, quantum Hamiltonian, eigenvalues and eigenstates of the effective Hamiltonian, state manipulation, improved architectures. The Transmon.

23 Apr 2024 (2h 00m)

Fabio Taddei - Course (teaching activity) - Face to face

The flux qubit: equivalent circuit, phase potential, effective Hamiltonian and state manipulations. Introduction to topological quantum computation, anyons and braiding of anyons.

24 Apr 2024 (2h 00m)

Sergio Pezzini - Course (teaching activity) - Both face to face and online

introduction to graphene, massless Dirac fermions and their quantum Hall effect; van der Waals assembly with hexagonal boron nitride and different generations of graphene devices; high-quality devices based on large-scale CVD graphene; correlation-driven physics in partially-filled graphene Landau levels; graphite-gated devices.

30 Apr 2024 (2h 00m)

Fabio Taddei - Course (teaching activity) - Face to face

Introduction to the fractional quantum Hall effect as a physical implementation of anyons. Discussion of two experiments for the detection of the fractional statistics of Abelian anyons. Introduction to parafermions and Majorana fermions. Example of a qubit with Majorana fermions.

08 May 2024 (2h 00m)

Sergio Pezzini - Course (teaching activity) - Both face to face and online

Bernal bilayer graphene, quantum Hall effect, gap opening; electrostatic confinement in BLG, quantum point contacts, quantum dots, coherent charge oscillations in doble dots; correlated phases in ultra-clean Bernal and rombohedral multilayers.

09 May 2024 (2h 00m)

Sergio Pezzini - Course (teaching activity) - Both face to face and online

graphene/hBN moiré superlattice, Dirac cones cloning; gap opening via sublattice-symmetry breaking, valley Hall effect; Hofstadter butterfly, Brown-Zak oscillations; dynamically reconfigurable graphene/hBN devices; 30°-twsited bilayer graphene, growth mechanism, dual-gated devices, Landau quantization of decoupled graphene layers, interlayer capacitante effects.

14 May 2024 (2h 00m)

Sergio Pezzini - Course (teaching activity) - Both face to face and online

Small-angle twisted bilayer graphene, lattice properties, assembly techniques, electrical transport at 2.4°, angle measurements via magnetic oscillations; magic-angle twisted bilayer graphene, origin of flat bands, correlated phase diagram, orbital magnetism, superconductivity; magic-angle multilayers; the quantum twisting microscope.

15 May 2024 (2h 00m)

Sergio Pezzini - Course (teaching activity) - Both face to face and online

Ballistic graphene Josephson junctions, fabrication, normal-state transport and Fabry-Pérot cavity, gate-tunable supercurent, magnetic interference; graphene transmons; supercurrent in the quantum Hall regime, chiral supercurrent; gate-defined Josephson junctions in magic-angle graphene.

05 Jun 2024 (2h 00m)

Fabio Beltram - Course (teaching activity) - Face to face

Scanning gate microscopy and edge states

12 Jun 2024 (2h 00m)

Fabio Beltram - Course (teaching activity) - Face to face

Sistemi 1D e gas elettronici fortemente correlati