Publications (44)
Terrestrial Very-Long-Baseline Atom Interferometry: Workshop Summary
Sven Abend, Baptiste Allard, Iván Alonso +250
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world…
Gravity as a classical channel and its dissipative generalization
Giovanni Di Bartolomeo, Matteo Carlesso, Angelo Bassi
Recent models formulated by Kafri, Taylor, and Milburn and by Tilloy and Diosi describe the gravitational interaction through a continuous measurement and feedback protocol. In suc…
Room temperature test of the Continuous Spontaneous Localization model using a levitated micro-oscillator
Di Zheng, Yingchun Leng, Xi Kong +9
The Continuous Spontaneous Localization (CSL) model predicts a tiny break of energy conservation via a weak stochastic force acting on physical systems, which triggers the collapse…
Collapse models and gravitational decoherence at test: How far can we push the limits of quantum mechanics?
Matteo Carlesso
Collapse models describe the breakdown of the quantum superposition principle when moving from microscopic to macroscopic scales. They are among the possible solutions to the quant…
Experimental bounds on linear-friction dissipative collapse models from levitated optomechanics
Giovanni Di Bartolomeo, Matteo Carlesso
Collapse models constitute an alternative to quantum mechanics that solve the well-know quantum measurement problem. In this framework, a novel approach to include dissipation in c…
Present status and future challenges of non-interferometric tests of collapse models
Matteo Carlesso, Sandro Donadi, Luca Ferialdi +3
The superposition principle is the cornerstone of quantum mechanics, leading to a variety of genuinely quantum effects. Whether the principle applies also to macroscopic systems or…
Gravitational interaction through a feedback mechanism
José Luis Gaona-Reyes, Matteo Carlesso, Angelo Bassi
We study the models of Kafri, Taylor and Milburn (KTM) and Tilloy and Diósi (TD), both of which implement gravity between quantum systems through a continuous measurement and feed…
Quantifying protocol efficiency: a thermodynamic figure of merit for classical and quantum state-transfer protocols
Qiongyuan Wu, Mario A. Ciampini, Mauro Paternostro +1
Manipulating quantum systems undergoing non-Gaussian dynamics in a fast and accurate manner is becoming fundamental to many quantum applications. Here, we focus on classical and qu…
Testing the gravitational field generated by a quantum superposition
Matteo Carlesso, Angelo Bassi, Mauro Paternostro +1
What gravitational field is generated by a massive quantum system in a spatial superposition? Despite decades of intensive theoretical and experimental research, we still do not kn…
Criticality-amplified quantum probing of a spontaneous collapse model
Giorgio Zicari, Matteo Carlesso, Andrea Trombettoni +1
Spontaneous collapse models, which are phenomenological mechanisms introduced and designed to account for dynamical wavepacket reduction, are attracting a growing interest from the…
Spontaneous Collapse Models
Matteo Carlesso, Sandro Donadi
Collapse models are phenomenological models introduced to solve the measurement problem in quantum mechanics. They modify the Schrödinger equation by adding non-linear and stochas…
Decoherence effects in non-classicality tests of gravity
Simone Rijavec, Matteo Carlesso, Angelo Bassi +2
The experimental observation of a clear quantum signature of gravity is believed to be out of the grasp of current technology. However, several recent promising proposals to test t…
Multilayer test masses to enhance the collapse noise
Matteo Carlesso, Andrea Vinante, Angelo Bassi
Recently, a non-thermal excess noise, compatible with the theoretical prediction provided by collapse models, was measured in a millikelvin nanomechanical cantilever experiment [Vi…
When Cavendish meets Feynman: A quantum torsion balance for testing the quantumness of gravity
Matteo Carlesso, Mauro Paternostro, Hendrik Ulbricht +1
We propose a thought experiment, based on a mechanism that is reminiscent of Cavendish's torsion balance, to investigate the possible quantum nature of the gravitational field gene…
Quantum-limited estimation of continuous spontaneous localization
Sam McMillen, Matteo Brunelli, Matteo Carlesso +4
We apply the formalism of quantum estimation theory to extract information about potential collapse mechanisms of the continuous spontaneous localisation (CSL) form. In order to es…
STE-QUEST -- Space Time Explorer and QUantum Equivalence principle Space Test: The 2022 medium-class mission concept
Naceur Gaaloul, Holger Ahlers, Leonardo Badurina +45
Space-borne quantum technologies, particularly those based on atom interferometry, are heralding a new era of strategic and robust space exploration. The unique conditions of space…
Generation of classical non-Gaussian distributions by squeezing a thermal state into non-linear motion of levitated optomechanics
Rafael Muffato, Tiberius Georgescu, Jack Homans +6
We report on an experiment achieving the dynamical generation of non-Gaussian states of motion of a levitated optomechanical system. We access intrinsic Duffing-like nonlinearities…
Towards relativistic generalization of collapse models
Anirudh Gundhi, Lajos Diósi, Matteo Carlesso
Spontaneous collapse models provide a possible, testable solution to the quantum measurement problem. While experiments are providing increasingly stronger bounds on their paramete…
Non-interferometric rotational test of the Continuous Spontaneous Localisation model: enhancement of the collapse noise through shape optimisation
Davide Giordano Ario Altamura, Matteo Carlesso, Sandro Donadi +1
The Continuous Spontaneous Localisation (CSL) model is the most studied among collapse models, which describes the breakdown of the superposition principle for macroscopic systems.…
Squeezing below the ground state of motion of a continuously monitored levitating nanoparticle
Qiongyuan Wu, Diana A. Chisholm, Rafael Muffato +5
Squeezing is a crucial resource for quantum information processing and quantum sensing. In levitated nanomechanics, squeezed states of motion can be generated via temporal control…
Adjoint master equation for Quantum Brownian Motion
Matteo Carlesso, Angelo Bassi
Quantum brownian motion is a fundamental model for a proper understanding of open quantum systems in different contexts such as chemistry, condensed matter physics, bio-physics and…
Opto-mechanical tests of collapse models
Matteo Carlesso, Mauro Paternostro
The gap between the predictions of collapse models and those of standard quantum mechanics widens with the complexity of the involved systems. Addressing the way such gap scales wi…
Quantum Physics in Space
Alessio Belenchia, Matteo Carlesso, Ãmer Bayraktar +17
Advances in quantum technologies are giving rise to a revolution in the way fundamental physics questions are explored at the empirical level. At the same time, they are the seeds…
Collapse models: main properties and the state of art of the experimental tests
Matteo Carlesso, Sandro Donadi
Collapse models represent one of the possible solutions to the measurement problem. These models modify the Schrödinger dynamics with non-linear and stochastic terms, which guaran…
Entanglement in Markovian hybrid classical-quantum theories of gravity
Oliviero Angeli, Matteo Carlesso
Markovian master equations underlie many areas of modern physics and, despite their apparent simplicity, they encode a rich and complex dynamics which is still under active researc…
On the linear friction many-body equation for dissipative spontaneous wavefunction collapse
Giovanni Di Bartolomeo, Matteo Carlesso, Kristian Piscicchia +3
We construct and study the simplest universal dissipative Lindblad master equation for many-body systems with the purpose of a new dissipative extension of existing nonrelativistic…
Non-interferometric test of the Continuous Spontaneous Localization model based on rotational optomechanics
Matteo Carlesso, Mauro Paternostro, Hendrik Ulbricht +2
The Continuous Spontaneous Localization (CSL) model is the best known and studied among collapse models, which modify quantum mechanics and identify the fundamental reasons behind…
Testing Continuous Spontaneous Localization model with charged macro-molecules
Emil Lenler-Eriksen, Michael Drewsen, Matteo Carlesso
In the last decade, a growing interest has been devoted to models of spontaneous collapse of the wavefunction, known also as collapse models. They coherently solve the well-known q…
Non-equilibrium quantum thermodynamics of a particle trapped in a controllable time-varying potential
Qiongyuan Wu, Matteo Carlesso
Non-equilibrium thermodynamics can provide strong advantages when compared to more standard equilibrium situations. Here, we present a general framework to study its application to…
Spontaneous collapse models lead to the emergence of classicality of the Universe
José Luis Gaona-Reyes, LucÃa Menéndez-Pidal, Mir Faizal +1
Assuming that Quantum Mechanics is universal and that it can be applied over all scales, then the Universe is allowed to be in a quantum superposition of states, where each of them…
Colored collapse models from the non-interferometric perspective
Matteo Carlesso, Luca Ferialdi, Angelo Bassi
Models of spontaneous wave function collapse describe the quantum-to-classical transition by assuming a progressive breakdown of the superposition principle when the mass of the sy…
Terrestrial Very-Long-Baseline Atom Interferometry: Summary of the Second Workshop
Adam Abdalla, Mahiro Abe, Sven Abend +307
This summary of the second Terrestrial Very-Long-Baseline Atom Interferometry (TVLBAI) Workshop provides a comprehensive overview of our meeting held in London in April 2024, build…
A perturbative algorithm for rotational decoherence
Matteo Carlesso, Hamid Reza Naeij, Angelo Bassi
Recent advances in levitated optomechanics provide new perspectives for the use of rotational degrees of freedom for the development of quantum technologies as well as for testing…
Current tests of collapse models: How far can we push the limits of quantum mechanics?
Matteo Carlesso, Angelo Bassi
Collapse models implement a progressive loss of quantum coherence when the mass and the complexity of quantum systems increase. We will review such models and the current attempts…
The Continuous Spontaneous Localization Layering Effect from a Lattice Perspective
Stephen L. Adler, Angelo Bassi, Matteo Carlesso
For a solid lattice, we rederive the Continuous Spontaneous Localization (CSL) noise total energy gain of a test mass starting from a Lindblad formulation, and from a similar start…
Testing Continuous Spontaneous Localization with Fermi liquids
Stephen L. Adler, Angelo Bassi, Matteo Carlesso +1
Collapse models describe phenomenologically the quantum-to-classical transition by adding suitable nonlinear and stochastic terms to the Schroedinger equation, thus (slightly) modi…
From basic science to technological development: the case for two avenues
Matteo Carlesso, Mauro Paternostro
We argue that, in the quest for the translation of fundamental research into actual quantum technologies, two avenues that have - so far - only partly explored should be pursued vi…
Decoherence due to gravitational time dilation: analysis of competing decoherence effects
Matteo Carlesso, Angelo Bassi
Recently, a static gravitational field, such as that of the Earth, was proposed as a new source of decoherence [1]. We study the conditions under which it becomes the dominant deco…
Lecture Notes on Quantum Algorithms in Open Quantum Systems
Matteo Carlesso
These lecture notes aim to provide a clear and comprehensive introduction to using open quantum system theory for quantum algorithms. The main arguments are Variational Quantum Alg…
On the effectiveness of the collapse in the Diósi-Penrose model
Laria Figurato, Marco Dirindin, José Luis Gaona-Reyes +3
The possibility that gravity plays a role in the collapse of the quantum wave function has been considered in the literature, and it is of relevance not only because it would provi…
Improved bounds on collapse models from rotational noise of LISA Pathfinder
Davide Giordano Ario Altamura, Andrea Vinante, Matteo Carlesso
Spontaneous wavefunction collapse models offer a solution to the quantum measurement problem, by modifying the Schrödinger equation with nonlinear and stochastic terms. The Contin…
Non-equilibrium quantum thermodynamics of a particle trapped in a controllable time-varying potential
Qiongyuan Wu, Luca Mancino, Matteo Carlesso +4
Many advanced quantum techniques feature non-Gaussian dynamics, and the ability to manipulate the system in that domain is the next-stage in many experiments. One example of meanin…
Impact of dynamical collapse models on inflationary cosmology
Anirudh Gundhi, José Luis Gaona-Reyes, Matteo Carlesso +1
Inflation solves several cosmological problems at the classical and quantum level, with a strong agreement between the theoretical predictions of well-motivated inflationary models…
Testing the foundations of quantum physics in space Interferometric and non-interferometric tests with Large Particles
Giulio Gasbarri, Alessio Belenchia, Matteo Carlesso +5
Quantum technologies are opening novel avenues for applied and fundamental science at an impressive pace. In this perspective article, we focus on the promises coming from the comb…