From Quantum Foam to Spacetime: A New Emergent Gravity?
This review explores how quantum field theory might give rise to classical gravity, investigating the role of Planck constants in shaping spacetime itself.
Science
From Quantum Foam to Familiar Skies: How the Universe Became Real
A new theoretical framework reveals how the transition from a quantum state to the classical spacetime we experience is driven by decoherence during the inflationary epoch.
Tuning Sound Waves: New Material Reveals Rich Phonon Dynamics
![The Raman spectra of [latex]\mathrm{InSiTe}_3[/latex] reveal polarization-dependent vibrational modes at both 80 K and 300 K, with the [latex]A_{1g}^{(3)}[/latex] mode exhibiting displacement patterns confined to silicon atoms and demonstrating that the material’s response is governed by interatomic forces, irrespective of crystallographic orientation relative to incident and scattered light.](https://arxiv.org/html/2602.20747v1/x2.png)
Researchers have discovered a way to generate and control a unique form of sound wave – a phonon frequency comb – within the layered material InSiTe3.
Beyond Plane Waves: Fixing Superposition in Multilayer Optics
![The distribution of input, reflection, transmission, and power imbalance across a single layer reveals frequency-ω and horizontal wavevector-[latex]k_x[/latex] dependencies, calculated using both standard and power modes within the outer medium, with discrepancies in power flux-quantified as [latex]\Delta z[/latex]-highlighting the nuanced energy transfer characteristics of the system.](https://arxiv.org/html/2602.20179v1/x8.png)
A new approach to modeling light propagation through complex materials resolves long-standing issues with energy conservation and wave superposition.
Quantum Shadows of Spinning Black Holes
![The study of a [latex]10^{6}\,M_{\odot}[/latex] black hole with a spin parameter of [latex]a/M = 0.9[/latex] reveals a logarithmic divergence in the gravitomagnetic AB phase as the inner arm radius approaches the outer horizon at approximately [latex]1.44\,r_{s}[/latex], with a characteristic flux cancellation and dip occurring when the inner and outer arm radii are equal, ultimately demonstrating the enormous magnitude-on the order of [latex]10^{22}[/latex] radians-of macroscopic gravitomagnetic flux in astrophysical black hole systems.](https://arxiv.org/html/2602.20337v1/x6.png)
New research reveals how the rotation of a black hole subtly alters the quantum behavior of superconducting materials.
Entangled States Under Pressure: A Holographic Discrepancy
![For a magnetic field strength of [latex]T=0.143[/latex] and a parameter [latex]C=35[/latex], the complex-valued quantity [latex]S_{A} \equiv \frac{4G_{N}^{(5)}}{V_{2}}S[/latex] exhibits a symmetry wherein its real and imaginary components remain invariant under the transformation [latex]i \rightarrow -i[/latex], indicating a specific relationship between its behavior across opposing field orientations.](https://arxiv.org/html/2602.20843v1/x4.png)
New research explores the limitations of using holographic duality to fully capture entanglement between quantum bits in the presence of magnetic fields.
Beyond Smooth Averages: Unveiling Hidden Structure in Complex Systems
![The study demonstrates that in a linear sigma model, the ratio [latex]GL[/latex] exhibits a temperature dependence affected by explicit breaking, with the interval defining the limits of reliability for mean-field theory and illustrating a pseudo-critical temperature’s relationship to this breaking parameter.](https://arxiv.org/html/2602.21095v1/x2.png)
A new theoretical framework moves past traditional mean-field approximations to reveal how spatial variations and interaction ranges shape the behavior of physical systems.
Untangling the Quantum Dance of One-Dimensional Anyons
Researchers have successfully created and observed one-dimensional anyons, providing compelling evidence for their exotic quantum behavior.
When Quantum Tunneling Fails: A New Twist in Deformed Mechanics
![The analysis of quantum wells reveals that beyond a critical threshold [latex]h_c[/latex], the energy gap’s prefactor and the cubic well’s imaginary component exhibit oscillatory behavior, suppressing tunneling at specific points and demonstrating the inherent limitations of any theoretical construct when approaching a singularity.](https://arxiv.org/html/2602.20576v1/x33.png)
A new analysis reveals how quantum tunneling can be suppressed in deformed quantum mechanical systems, uncovering connections to fundamental mathematical structures.
Quantum Waves in Curved Spacetime: New Insights into Gravity’s Influence
A new theoretical framework explores how particles with internal structure behave in gravitational fields, revealing subtle effects on their quantum states.