Publications (39)
A Hyperspectral Microscope based on an Ultrastable Common-Path Interferometer
A. Candeo, B. E. Nogueira de Faria, M. Erreni +5
We introduce a wide field hyperspectral microscope using the Fourier-transform approach. The interferometer is based on the Translating-Wedge-Based Identical Pulses eNcoding System…
The emission of electromagnetic radiation from a quantum system interacting with an external noise: A general result
S. Donadi, A. Bassi
We compute the spectrum of emitted radiation by a generic quantum system interacting with an external classic noise. Our motivation is to understand this phenomenon within the fram…
Improved noninterferometric test of collapse models using ultracold cantilevers
A. Vinante, R. Mezzena, P. Falferi +2
Spontaneous collapse models predict that a weak force noise acts on any mechanical system, as a consequence of the collapse of the wave function. Significant upper limits on the co…
Collapse models: from theoretical foundations to experimental verifications
A. Bassi, H. Ulbricht
The basic strategy underlying models of spontaneous wave function collapse (collapse models) is to modify the Schroedinger equation by including nonlinear stochastic terms, which t…
SAGE: A Proposal for a Space Atomic Gravity Explorer
G. M. Tino, A. Bassi, G. Bianco +44
The proposed mission "Space Atomic Gravity Explorer" (SAGE) has the scientific objective to investigate gravitational waves, dark matter, and other fundamental aspects of gravity a…
Experimental bounds on collapse models from gravitational wave detectors
M. Carlesso, A. Bassi, P. Falferi +1
Wave function collapse models postulate a fundamental breakdown of the quantum superposition principle at the macroscale. Therefore, experimental tests of collapse models are also…
The effect of spontaneous collapses on neutrino oscillations
S. Donadi, A. Bassi, C. Curceanu +1
We compute the effect of collapse models on neutrino oscillations. The effect of the collapse is to modify the evolution of the `spatial' part of the wave function, which indirectl…
Narrowing the parameter space of collapse models with ultracold layered force sensors
A. Vinante, M. Carlesso, A. Bassi +6
Despite the unquestionable empirical success of quantum theory, witnessed by the recent uprising of quantum technologies, the debate on how to reconcile the theory with the macrosc…
Towards Quantum Superpositions of a Mirror: an Exact Open Systems Analysis
A. Bassi, E. Ippoliti, Stephen L. Adler
We analyze the recently proposed mirror superposition experiment of Marshall, Simon, Penrose, and Bouwmeester, assuming that the mirror's dynamics contains a non-unitary term of th…
Underground test of quantum mechanics - the VIP2 experiment
Johann Marton, S. Bartalucci, A. Bassi +25
We are experimentally investigating possible violations of standard quantum mechanics predictions in the Gran Sasso underground laboratory in Italy. We test with high precision the…
Are collapse models testable with quantum oscillating systems? The case of neutrinos, kaons, chiral molecules
M. Bahrami, S. Donadi, L. Ferialdi +4
Collapse models provide a theoretical framework for understanding how classical world emerges from quantum mechanics. Their dynamics preserves (practically) quantum linearity for m…
Towards Quantum Superpositions of a Mirror: an Exact Open Systems Analysis - Calculational Details
S. L. Adler, A. Bassi, E. Ippoliti
We give details of calculations analyzing the proposed mirror superposition experiment of Marshall, Simon, Penrose, and Bouwmeester within different stochastic models for state vec…
Upper bounds on spontaneous wave-function collapse models using millikelvin-cooled nanocantilevers
A. Vinante, M. Bahrami, A. Bassi +3
Collapse models predict a tiny violation of energy conservation, as a consequence of the spontaneous collapse of the wave function. This property allows to set experimental bounds…
Dynamical Reduction Models: present status and future developments
A. Bassi
We review the major achievements of the dynamical reduction program, showing why and how it provides a unified, consistent description of physical phenomena, from the microscopic q…
VIP-2 at LNGS: An experiment on the validity of the Pauli Exclusion Principle for electrons
J. Marton, S. Bartalucci, A. Bassi +26
We are experimentally investigating possible violations of standard quantum mechanics predictions in the Gran Sasso underground laboratory in Italy. We test with high precision the…
Underground test of gravity-related wave function collapse
S. Donadi, K. Piscicchia, C. Curceanu +3
Roger Penrose proposed that a spatial quantum superposition collapses as a back-reaction from spacetime, which is curved in different ways by each branch of the superposition. In t…
Are Collapse Models Testable via Flavor Oscillations?
S. Donadi, A. Bassi, C. Curceanu +2
Collapse models predict the spontaneous collapse of the wave function, in order to avoid the emergence of macroscopic superpositions. In their mass-dependent formulation they claim…
Geometric phase for open quantum systems and stochastic unravellings
A. Bassi, E. Ippoliti
We analyze the geometric phase for an open quantum system when computed by resorting to a stochastic unravelling of the reduced density matrix (quantum jump approach or stochastic…
Entangling macroscopic diamonds at room temperature: Bounds on the continuous-spontaneous-localization parameters
S. Belli, R. Bonsignori, G. D'Auria +5
A recent experiment [K. C. Lee et al., Science 334, 1253 (2011)] succeeded in detecting entanglement between two macroscopic specks of diamonds, separated by a macroscopic distance…
CSL Collapse Model Mapped with the Spontaneous Radiation
K. Piscicchia, A. Bassi, C. Curceanu +4
In this paper, new upper limits on the parameters of the Continuous Spontaneous Localization (CSL) collapse model are extracted. To this end, the X-ray emission data collected by t…
Is Gravity Quantum?
M. Bahrami, A. Bassi, S. McMillen +2
What gravitational field is generated by a massive quantum system in a spatial superposition? This is one of the most important questions in modern physics, and after decades of in…
Book Review: "Quantum Theory as an Emergent Phenomenon", by Stephen L. Adler
A. Bassi
This is a book review of the book: "Quantum Theory as an Emergent Phenomenon", by Stephen L. Adler (Cambridge University Press - 2004)
Theoretical Limits of Protocols for Distinguishing Different Unravelings
J. L. Gaona-Reyes, D. G. A. Altamura, A. Bassi
Stochastic unravelings of Lindblad-type master equations, such as stochastic Schrödinger equations (SSEs), provide powerful tools to model open quantum systems and continuous meas…
Effect of metal clusters on the swelling of gold-fluorocarbon-polymer composite films
A. Convertino, A. Valentini, A. Bassi +3
We have investigated the phenomenon of swelling due to acetone diffusion in fluorocarbon polymer films doped with different gold concentrations below the percolation threshold. The…
On the uniqueness of the equation for state-vector collapse
A. Bassi, D. Duerr, G. Hinrichs
The linearity of quantum mechanics leads, under the assumption that the wave function offers a complete description of reality, to grotesque situations famously known as Schroeding…
The quantum theory of measurement within dynamical reduction models
A. Bassi, D. G. M. Salvetti
We analyze in mathematical detail, within the framework of the QMUPL model of spontaneous wave function collapse, the von Neumann measurement scheme for the measurement of a 1/2 sp…
On a recent proposal of faster than light quantum communication
A. Bassi, G. C. Ghirardi
In a recent paper, A.Y. Shiekh has discussed an experimental set-up which, in his opinion, should make possible faster-than-light communication using the collapse of the quantum wa…
Underground tests of quantum mechanics. Whispers in the cosmic silence?
C. Curceanu, S. Bartalucci, A. Bassi +25
By performing X-rays measurements in the "cosmic silence" of the underground laboratory of Gran Sasso, LNGS-INFN, we test a basic principle of quantum mechanics: the Pauli Exclusio…
The Hilbert space operator formalism within dynamical reduction models
A. Bassi, G. C. Ghirardi, D. G. M. Salvetti
Unlike standard quantum mechanics, dynamical reduction models assign no particular a priori status to `measurement processes', `apparata', and `observables', nor self-adjoint opera…
Quantum vs classical computation: a proposal opening a new perspective
A. Bassi, G. C. Ghirardi
We develop a classical model of computation (the S model) which captures some important features of quantum computation, and which allows to design fast algorithms for solving spec…
Unitary unravelling for the Dissipative Continuous Spontaneous Localization model: application to optomechanical experiments
J. Nobakht, M. Carlesso, S. Donadi +2
The Continuous Spontaneous Localization (CSL) model strives to describe the quantum-to-classical transition from the viewpoint of collapse models. However, its original formulation…
Coherent scattering in non-relativistic quantum mechanics
G. Gasbarri, S. Donadi, A. Bassi
We show under which conditions a particle scatters coherently on a multi-particles system, working in the non relativistic framework. In a nutshell, in order to have coherent scatt…
On the spontaneous emission of electromagnetic radiation in the CSL model
S. Donadi, A. Bassi, D. -A. Deckert
Spontaneous photon emission in the Continuous Spontaneous Localization (CSL) model is studied one more time. In the CSL model each particle interacts with a noise field that induce…
Spontaneously emitted X-rays: an experimental signature of the dynamical reduction models
C. Curceanu, S. Bartalucci, A. Bassi +29
We present the idea of searching for X-rays as a signature of the mechanism inducing the spontaneous collapse of the wave function. Such a signal is predicted by the continuous spo…
Collapse models: analysis of the free particle dynamics
A. Bassi
We study a model of spontaneous wavefunction collapse for a free quantum particle. We analyze in detail the time evolution of the single-Gaussian solution and the double-Gaussian s…
Numerical analysis of a spontaneous collapse model for a two-level system
A. Bassi, E. Ippoliti
We study a spontaneous collapse model for a two-level (spin) system, in which the Hamiltonian and the stochastic terms do not commute. The numerical solution of the equations of mo…
Beyond quantum mechanics? Hunting the 'impossible' atoms (Pauli Exclusion Principle violation and spontaneous collapse of the wave function at test)
K. Piscicchia, C. Curceanu, S. Bartalucci +27
The development of mathematically complete and consistent models solving the so-called "measurement problem", strongly renewed the interest of the scientific community for the foun…
Non-interferometric Test of Collapse Models in Optomechanical Systems
M. Bahrami, M. Paternostro, A. Bassi +1
The test of modifications to quantum mechanics aimed at identifying the fundamental reasons behind the un-observability of quantum mechanical superpositions at the macro-scale is a…
The Conway-Kochen argument and relativistic GRW models
A. Bassi, G. C. Ghirardi
In a recent paper, Conway and Kochen proposed what is now known as the "Free Will theorem" which, among other things, should prove the impossibility of combining GRW models with sp…