The Fabric of Reality, Reimagined
![Observations of the quasar J0836+0054, when meticulously modeled against expected telescope performance [latex] PSF [/latex], reveal a subtle residual blurring-potentially indicative of Planck-scale foam-manifesting as a diminished concentration of photons within the central diffraction spike, though insufficient to confirm its existence, but establishing observational limits on the scale of such quantum gravitational effects.](https://arxiv.org/html/2603.18277v1/quasar_images.png)
New research proposes a holographic model of spacetime foam and finds evidence of its influence in high-energy cosmic events.
Science
Beyond the Vacuum: Unifying Amplitudes and Background Fields
A new perspective reveals a fundamental connection between scattering amplitudes, traditionally calculated in the vacuum, and quantities defined on curved backgrounds using Bogoliubov coefficients.
Beyond Hydrodynamics: Unveiling Late-Time Quark-Gluon Plasma Behavior
![The rapid growth of coefficients-detailed in [latex]Eq.1[/latex] and observed within a frozen condensate-demonstrates a sector-dependent scaling, with each curve representing a distinct power of [latex]\ln(\Lambda\tau)[/latex] and revealing how these parameters contribute to the overall factorial increase.](https://arxiv.org/html/2603.17985v1/x1.png)
New analytical work reveals the complex, non-hydrodynamic evolution of a superfluid quark-gluon plasma undergoing rapid expansion.
Unlocking Hidden Order: A New Way to Probe Material Interiors
![A localized electron state achieves quadrupole resonance through the coordinated absorption of both a phonon and a [latex]\pi\pi[/latex]-photon-a process facilitated by a linearly localized microwave and an acoustic wave whose propagation direction is rotated within the x-y plane under a static magnetic field.](https://arxiv.org/html/2603.17359v1/x1.png)
Researchers have developed a novel technique to visualize the subtle internal structure of materials, revealing previously inaccessible details about their magnetic and electric properties.
Engineering Wave Control with Imaginary Potentials
Researchers have discovered a novel method to induce non-Hermitian topological effects in passive systems by cleverly manipulating energy dissipation.
Beyond BEC: Exploring Exotic States of Matter
New research reveals the fascinating interplay of interactions and quantum effects in ultracold bosonic mixtures, leading to the emergence of quantum droplets and supersolid phases.
Where Do We Look for ET?
A new framework categorizes the search for extraterrestrial intelligence by mapping the accessibility of potential signals against our ability to recognize them.
Hunting a Quantum Spin Liquid: New Insights into Y3Cu2Sb3O14
![The complex crystal structure of [latex]Y_3Cu_2Sb_3O_{14}[/latex] features two distinct copper sites, Cu-1 and Cu-2, arranged in triangular planes, with Cu-2 exhibiting a shorter copper-oxygen bond along the z-axis that inverts the crystal field distortion observed in Cu-1; density functional theory calculations reveal that the electronic band structure near the Fermi level is effectively modeled by either a three-band system dominated by Cu-1 and Cu-2 orbitals or a ten-band system with excellent agreement to full DFT results.](https://arxiv.org/html/2603.17796v1/Figure-1.png)
Theoretical calculations suggest the complex oxide Y3Cu2Sb3O14 exhibits strong potential as a host material for a long-sought quantum spin liquid state.
Spin Foams: Beyond Hilbert Space
New research establishes a rigorous mathematical foundation for spin foam models, revealing that a consistent description of quantum gravity requires a shift from conventional quantum theory.
Dark Matter’s Subtle Flavors: A New Hunt for Interactions
![Constraints on ultralight dark matter, derived from diverse sources including pulsar timing arrays [latex]|\lambda\_{ij}\bar{\phi}/(m\_{i}-m\_{j})|[/latex], atomic clocks utilizing yttrium/cesium and strontium/hydrogen/silicon, tritium beta decay, potassium-37 decay, and meson decay experiments, reveal a landscape of interconnected limits on the properties of this elusive substance.](https://arxiv.org/html/2603.17237v1/x6.png)
New research explores how ultralight dark matter might interact with ordinary matter through couplings to down-type quarks, potentially revealing itself through precision measurements.