Beyond Entanglement: Quantum Correlations in a Expanding Universe
![Quantum discord reaches a peak value when the momentum mode is specified at [latex] \theta = \pi/2 [/latex], indicating a maximized state of quantumness beyond classical correlations.](https://arxiv.org/html/2512.24802v1/x15.png)
New research explores how quantum discord-a form of correlation distinct from entanglement-survives even as entanglement fades in the dynamic environment of de Sitter space, a key feature of modern cosmology.
![Normalized pressure fluctuates with temperature, exhibiting a sensitivity dictated by the amplitude and frequency of gravitational waves [latex] GW [/latex].](https://arxiv.org/html/2512.24691v1/Pressdifffreq.png)
![The study examines the interplay between the coisotropic [latex]\mathcal{C}_{M^{4}}[/latex] and the Lagrangian [latex]\mathcal{L}_{{{\varepsilon}},{\bf g}}[/latex] within the manifold [latex]\mathscr{P}_{M^{4}}[/latex], suggesting a fundamental relationship governing the system’s dynamics.](https://arxiv.org/html/2512.25053v1/cois-lag.png)

![The twisted-translated Coulomb branch operator [latex]\mathcal{O}(\varphi)[/latex] manifests as distinct actions on the hemisphere partition function-[latex]\mathcal{O}_{N}[/latex] corresponding to [latex]\mathcal{O}(0)[/latex] at the [latex]N[/latex] endpoint of [latex]HS^{1}[/latex], and [latex]\mathcal{O}_{S}[/latex] representing [latex]\mathcal{O}(\pi)[/latex]-illuminating how operator behavior is intrinsically linked to specific points within the system’s geometric configuration.](https://arxiv.org/html/2512.23908v1/x3.png)


![Correlation functions for [latex]J/\psi \Lambda[/latex] pairs were obtained, parameterized according to the values detailed in Table 2, to explore the underlying dynamics of this particle system.](https://arxiv.org/html/2512.24247v1/x5.png)
![The residue of a bound-state pole in a six-dimensional system exhibits a dependence on the bound-state mass [latex]m_b^2[/latex], with calculations employing [latex]N_{max} = 8[/latex] and [latex]N_{max} = 10[/latex] demonstrating convergence of the renormalised coupling [latex]g_{ren}[/latex] to a finite value at [latex]m_b^2 = 4[/latex].](https://arxiv.org/html/2512.24474v1/x6.png)