The Inevitable Collapse of Quantum Superpositions
![The study demonstrates that maximizing the difference between the density matrices of the GHZ state and a mixed state-specifically, $tr[A(\rho_{GHZ} - \rho_{mix})]$ at time 0 and $tr[A(\overline{\rho_{GHZ}} - \overline{\rho_{mix}})]$ as time approaches infinity-yields consistent behavior across a range of parameters ($h_z = 0.6$, $h_x = 0.2$, $J_1 = 1.0$, $J_2 = 1.35$, $d = 0.5$, and $e = 0.1$), suggesting a robustness in the observed phenomenon despite variations in system configuration.](https://arxiv.org/html/2512.11522v1/x4.png)
New research demonstrates that even perfectly isolated macroscopic quantum states are destined to behave classically due to inherent dynamical processes.
Science
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