Stochastic quantum theory may allow objective thermalization

What the study found: The authors argue that quantum theory needs stochastic corrections to describe systems approaching the thermodynamic limit. They say their extension is almost the same as standard quantum mechanics for microscopic systems, but it allows individual macroscopic isolated systems to objectively thermalize.
Why the authors say this matters: The study suggests this could address the mismatch between time-reversal symmetric quantum dynamics and the irreversible equilibration seen in thermodynamic systems. The authors conclude that it may provide a falsifiable description of spontaneous universal irreversibility and the quantum-to-classical crossover.
What the researchers tested: The paper constructs a stochastic extension of quantum theory and discusses adding objective collapse. It also states that a fluctuation-dissipation relation is used to ensure physical consistency, including norm preservation, energy conservation, no superluminal signalling, and microcanonical equilibrium.
What worked and what didn't: The model is described as practically identical to quantum mechanics for microscopic systems, while generically allowing objective thermalization for individual macroscopic isolated systems. The abstract also says the dynamics can describe spontaneous symmetry breaking, quantum state reduction, and objective quantum thermalization, and that ensembles show hybrid statistics integrating Born's rule and microcanonical equilibrium.
What to keep in mind: The abstract does not provide experimental results or detailed limitations. The claims are presented as a theoretical construction and discussion rather than a reported empirical test.

Key points

• The authors argue that standard quantum theory needs stochastic corrections near the thermodynamic limit.
• Their extension is described as nearly identical to quantum mechanics for microscopic systems.
• The model is said to allow individual macroscopic isolated systems to objectively thermalize.
• A fluctuation-dissipation relation is said to preserve norm, energy, and no superluminal signalling.
• The abstract says the framework can include objective collapse and microcanonical equilibrium.