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Non-Markovian Poissonian Spontaneous Collapse Models
Nicolò Piccione
9 July 2026
Spontaneous collapse models provide a possible solution to the measurement problem by modifying standard quantum dynamics. The modification consists of adding non-linear and stochastic terms inducing wavefunction collapse in space. Non-Markovian versions of these models are…
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Non-equilibrium thermodynamics of collapse models in the strongly non-Gaussian regime
Pedro B. Melo, Pedro V. Paraguassú, Simone Artini, Gabriele Lo Monaco, Sandro Donadi, Mauro Paternostro
4 June 2026
Standard objective collapse models offer a unified approach to the quantum measurement problem but predict an unphysical, indefinite increase in the energy of the system. The dissipative Diósi-Penrose (dDP) model resolves this heating issue by introducing a linear friction…
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Can classical theories of gravity produce entanglement?
Anirudh Gundhi, Giorgia Infantino, Angelo Bassi
21 April 2026
A recent paper published on Nature [Nature,646,813(2025)] by Aziz and Howl, claims that quantum particles become entangled when they interact gravitationally, even if the gravitational potential is treated classically. We show that the entanglement found by the authors stems…
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Quantum foundations for quantum technologies in the International Year of Quantum (2025)
Angelo Bassi
4 March 2026
From the very beginning, Quantum Mechanics has been accompanied by crucial foundational questions: the possibility of visualizing physical processes, the limits of measurement epitomized by the Heisenberg uncertainty principle, the existence of a deeper underlying reality with…
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Gravitational Poissonian Spontaneous Localization Model of Hybrid Quantum-Classical Newtonian Gravity: Energy Increase and Experimental Bounds
Nicolò Piccione
22 February 2026
The Gravitational Poissonian Spontaneous Localization (GPSL) model is a hybrid classical-quantum framework in which Newtonian gravity emerges from stochastic collapses of a smeared mass-density operator. Consistency of the hybrid dynamics entails momentum diffusion and, hence,…
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Diffusion Minimization via Optimal Smearing in Collapse and Hybrid Classical-Quantum Gravitational Models
Nicolò Piccione
1 November 2025
Spontaneous diffusion (i.e., non-conservation of energy) is a prominent, testable prediction of collapse and hybrid classical-quantum gravitational models. Without smearing of the mass density operator, the associated heating (or energy increase) rate diverges, yet the smearing…
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Mitigating Coherent Errors through a Decoherence-Resistant Variational Framework employing Stabilizer State
Giovanni Di Bartolomeo, Giulio Crognaletti, Angelo Bassi, Michele Vischi
23 October 2025
Stabilizer states are a central resource in quantum information processing, underpinning a wide range of applications. While they can be efficiently generated via Clifford circuits, the presence of coherent errors, such as small-angle miscalibrations in native gate…
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Spontaneous Collapse Models
Matteo Carlesso, Sandro Donadi
26 August 2025
Collapse models are phenomenological models introduced to solve the measurement problem in quantum mechanics. They modify the Schrödinger equation by adding non-linear and stochastic terms, which induce the wavefunction collapse in space. The collapse effects are negligible for…
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Broken Detailed Balance and Entropy Production in CPTP Quantum Brownian Motion
Simone Artini, Gabriele Lo Monaco, Alberto Imparato, Mauro Paternostro, Sandro Donadi
31 July 2025
We rigorously analyze the non-equilibrium thermodynamic behavior of various formulations of quantum Brownian motion (QBM) using the framework of stochastic thermodynamics. While the widely used Caldeira-Leggett master equation exhibits desirable thermodynamic features, such as…
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Towards relativistic generalization of collapse models
Anirudh Gundhi, Lajos Diósi, Matteo Carlesso
9 July 2025
Spontaneous collapse models provide a possible, testable solution to the quantum measurement problem. While experiments are providing increasingly stronger bounds on their parameters, a full-fledged relativistic extension is still missing. Previous attempts have encountered…
