Quantum Walks Reveal a Sudden Shift in Behavior
New research demonstrates that continuously monitoring a quantum walk can induce a dramatic change in how it splits, akin to a phase transition.
Science
Building Universes from String Theory: A New Approach to de Sitter Space
Researchers are exploring how to construct de Sitter space – a key component of our universe’s expansion – as an excited state within the framework of string theory, pushing the boundaries of theoretical cosmology.
Entanglement’s Reach: How Broken Symmetry Links Momentum to Long-Range Correlations
![Twisted periodic boundary conditions reveal fundamental distinctions in the momentum distributions of one-dimensional systems, demonstrating that spatially localized states maintain a trivial momentum [latex]K_0 = 0[/latex] regardless of twisting, while extended, delocalized states exhibit a corresponding shift in their momentum peaks-a behavior that contrasts with the uniform distribution observed in localized states and allows for their differentiation based on boundary conditions.](https://arxiv.org/html/2601.15345v1/x1.png)
New research reveals a fundamental connection between a system’s momentum distribution and the extent of entanglement when translational symmetry is absent.
Beyond Gaussianity: Unveiling Order in 2D Superfluids
New matter-wave interferometry experiments reveal the full distribution of order parameter fluctuations in two-dimensional Bose gases, providing insights into universal behavior at the BKT transition and non-equilibrium dynamics.
Before the Big Bang: A Quantum Bounce for the Universe
A new theoretical model explores a universe that avoided a singularity by ‘bouncing’ from a contracting phase, offering a potential solution to the Hubble tension and insights into the earliest moments of existence.
Unlocking Muon Mysteries: A New Era of Precision Physics
![The layout of the MUon Science Establishment at J-PARC, as detailed in reference [Kawamura:2018apy], provides the infrastructure necessary for advanced research utilizing muons-elementary particles crucial for investigating fundamental physics and material science.](https://arxiv.org/html/2601.15818v1/muse.png)
Advances in muon beam technology are opening unprecedented avenues for exploring fundamental physics, from probing the structure of matter to searching for new particles and interactions.
Untangling the Quantum Web: A Unified View of Particle Decay Entanglement
A new theoretical framework provides a comprehensive method for analyzing entanglement in the decay of particle-antiparticle pairs, paving the way for precision measurements in high-energy physics.
Neutrinos Challenge Classical Physics
![The study demonstrates that the significance of quantum effects at the Deep Underground Neutrino Experiment (DUNE) diminishes as systematic errors [latex]\delta P_{\rm syst}[/latex] increase, falling below the thresholds established by two classical baselines - the First Classical (FC) and Extended First Classical (EF) approaches - suggesting that precision in error control is paramount to observing subtle quantum phenomena.](https://arxiv.org/html/2601.15375v1/x20.png)
New analysis reveals that long-baseline neutrino experiments offer a unique way to probe the foundations of quantum mechanics and demonstrate non-classical behavior.
The Quantum Mind: How Uncertainty Shapes Intuition
New research suggests our brains may harness principles from quantum physics to navigate complex decisions and embrace multiple possibilities.
Echoes of the Early Universe: How Cosmic Defects Could Reveal Dark Energy
![The persistence of string defects within the [latex]4\mathbb{C}[/latex] model is prolonged by strong screening and pinning effects, suggesting that the pathway to global structural coherence is not immediate, but rather contingent upon overcoming these localized impediments.](https://arxiv.org/html/2601.15234v1/figures/3Dframes.jpeg)
New simulations explore how phase transitions in the early universe, specifically within a symmetron dark energy model, affect the formation of large-scale structures and generate detectable signatures in cosmic defect networks.