66 citations · 323 across the 18 of their papers we have counts for
20 papers
Universal linear manipulation via routing and projective measurements
Alessio Baldazzi, Sonia Mazzucchi, Lorenzo Pavesi
Multiport interferometers with ports are basic devices in both classical and quantum photonics. Ideally, they implement a linear unitary transformation between the input and ou…
Coupled integrated photonic quantum memristors using a single photon source made of a colour center
Alessio Baldazzi, Roy Philip George Konnoth Ancel, Sebastiano Guaraldo +7
Photonic quantum memristors provide a measurement-induced route to nonlinear and history-dependent quantum dynamics. Experimental demonstrations have so far focused on isolated dev…
A resource-efficient and noise-robust entanglement witness based on the swap test
Sebastiano Guaraldo, Sonia Mazzucchi, Alessio Baldazzi +2
Quantum entanglement is an essential resource for quantum technologies, and the controlled swap test provides a versatile tool for its detection and quantification. Here, we propos…
Resource-efficient variational quantum solver for the travelling salesman problem and its silicon photonics implementation
Alessio Baldazzi, Stefano Azzini, Lorenzo Pavesi
The travelling salesman problem is a well-known example of computationally-hard combinatorial problem for classical machines. Here, we propose a novel variational quantum algorithm…
Four-Qubit Variational Algorithms in Silicon Photonics with Integrated Entangled Photon Sources
Alessio Baldazzi, Matteo Sanna, Massimo Borghi +2
Variational quantum algorithms are hybrid quantum-classical approaches extensively studied for their potential to leverage near-term quantum hardware for computational advantages.…
Universal multiport interferometers for post-selected multi-photon gates
Alessio Baldazzi, Lorenzo Pavesi
We show how to use universal multiport interferometers' schemes in order to create photonic post-selected Controlled-Z and Controlled-Controlled-Z gates, which are equivalent, modu…
A linear photonic swap test circuit for quantum kernel estimation
Alessio Baldazzi, Nicolò Leone, Matteo Sanna +2
Among supervised learning models, Support Vector Machine stands out as one of the most robust and efficient models for classifying data clusters. At the core of this method, a kern…
Quantum Circuit Mapping for Universal and Scalable Computing in MZI-based Integrated Photonics
Yong Kwon, Alessio Baldazzi, Lorenzo Pavesi +1
Linear optical quantum computing (LOQC) offers a quantum computation paradigm based on well-established and robust technology and flexible environmental conditions following DiVinc…
Brillouin nonlinearity characterizations of a high refractive index silicon oxynitride platform
Kaixuan Ye, Akshay Keloth, Yvan Klaver +6
Silicon oxynitride (SiON) is a low-loss and versatile material for linear and nonlinear photonics applications. Controlling the oxygen-to-nitrogen (O/N) ratio in SiON provides an e…
Robustness of the derivative expansion in Asymptotic Safety
Alessio Baldazzi, Kevin Falls, Yannick Kluth +1
We analyse the renormalisation group flow of quantum gravity at sixth order in the derivative expansion within the background field approximation. Non-linear field redefinitions ar…
SiN integrated photonic components in the Visible to Near-Infrared spectral region
Matteo Sanna, Alessio Baldazzi, Gioele Piccoli +3
Integrated photonics has emerged as one of the most promising platforms for quantum applications. The performances of quantum photonic integrated circuits (QPIC) necessitate a dema…
Do different kinds of photon-pair sources have the same indistinguishability in quantum silicon photonics?
Jong-Moo Lee, Alessio Baldazzi, Matteo Sanna +5
In the same silicon photonic integrated circuit, we compare two types of integrated degenerate photon-pair sources (microring resonators or waveguides) by means of Hong-Ou-Mandel (…
Metric-Affine Gravity as an Effective Field Theory
A. Baldazzi, O. Melichev, R. Percacci
We discuss theories of gravity with independent metric (or frame field) and connection, from the point of view of effective field theory. We count the parity-even Lagrangian terms…
Relational observables in Asymptotically safe gravity
Alessio Baldazzi, Kevin Falls, Renata Ferrero
We introduce an approach to compute the renormalisation group flow of relational observables in quantum gravity which evolve from their microscopic expressions towards the full qua…
Essential Quantum Einstein Gravity
Alessio Baldazzi, Kevin Falls
The non-perturbative renormalisation of quantum gravity is investigated allowing for the metric to be reparameterised along the RG flow, such that only the essential couplings cons…
Essential renormalisation group
Alessio Baldazzi, Riccardo Ben Alì Zinati, Kevin Falls
We propose a novel scheme for the exact renormalisation group motivated by the desire of reducing the complexity of practical computations. The key idea is to specify renormalisati…
Limit of vanishing regulator in the functional renormalization group
Alessio Baldazzi, Roberto Percacci, Luca Zambelli
The non-perturbative functional renormalization group equation depends on the choice of a regulator function, whose main properties are a "coarse-graining scale" and an overall…
Functional Renormalization and
Alessio Baldazzi, Roberto Percacci, Luca Zambelli
Working with scalar field theories, we discuss choices of regulator that, inserted in the functional renormalization group equation, reproduce the results of dimensional regulariza…
Quantum fields without Wick rotation
Alessio Baldazzi, Roberto Percacci, Vedran Skrinjar
We discuss the calculation of one-loop effective actions in Lorentzian spacetimes, based on a very simple application of the method of steepest descent to the integral over the fie…
Wicked metrics
Alessio Baldazzi, Roberto Percacci, Vedran Skrinjar
There are various ways of defining the Wick rotation in a gravitational context. There are good arguments to view it as an analytic continuation of the metric, instead of the coord…