The Unexpected Link Between Randomness and Order
![Numerical simulation reveals that two overdamped Brownian particles, subject to feedback control of their joint statistics, exhibit finite-time entanglement evidenced by a cross-covariance that grows logarithmically with time-specifically, [latex]\mathrm{Cov}[x\_{1},x\_{2}]=2\kappa\sqrt{D\_{1}D\_{2}}\ln(t/t\_{0})[/latex]-demonstrating how outcome-space feedback can induce correlations even in systems governed by random motion.](https://arxiv.org/html/2601.02388v1/x2.png)
New research reveals how feedback within stochastic systems can drive statistical convergence, blurring the lines between chance and predictability.
Science
Spooky Action at a Distance, Confirmed by Gravity?
![The theoretical setup explores how a mass [latex]A[/latex], existing in a past superposition, recombines at a distinct spacetime point from a similar process affecting mass [latex]B[/latex], with the propagation of which-path information - encoded in phases [latex]\varphi^{\textsc{b}}\_{\textsc{a}s\_{\textsc{a}}}[/latex] - and decoherence-inducing radiation (quantified by [latex]\Gamma_a[/latex] and [latex]\Gamma_b[/latex]) both adhering to causal limits defined by a hypersurface Σ.](https://arxiv.org/html/2601.03214v1/x1.png)
New research explores the conditions under which gravitational entanglement could reveal the existence of the elusive graviton particle.
Quantum Sensors Tighten the Search for Dark Matter
![The study demonstrates that the aluminum transmon loss function, initially modeled with a Lindhard function and a superconducting gap correction, exhibits momentum-independent behavior for low-energy quanta (q < a few hundred eV), but converges to a bulk-like response at higher energies [latex]q \gtrsim 2\,{\rm keV} \gg d^{-1}[/latex], where <i>d</i> represents the aluminum layer thickness, effectively eliminating discernible differences attributable to the thin-layer geometry.](https://arxiv.org/html/2601.02474v1/x1.png)
New analysis of superconducting qubit data reveals a powerful, unexpected probe for interactions between dark matter and ordinary matter.
Twisted Boundaries, Subtle Anomalies: Unveiling Hidden Symmetries in 2D Fermions
New research demonstrates how the parity anomaly of a 2+1D Dirac fermion can be detected and matched using twisted boundary conditions and crystalline symmetries on a lattice.
Hunting Dark Matter with Molecular Magnets
![Dysprosium emerges as a promising medium for dark photon research, exhibiting sensitivity to kinetic mixing ε across a range of values-specifically, when [latex]f[/latex] varies from 0.01 to 0.1-and potentially unlocking several orders of magnitude of previously unexplored parameter space.](https://arxiv.org/html/2601.01043v1/x9.png)
A new approach leverages the unique properties of single-molecule magnets to search for interactions with elusive dark matter particles.
Catching Atoms in Motion: X-rays Illuminate Ultrafast Material Dynamics
New X-ray techniques are providing an unprecedented glimpse into the fleeting world of atomic-scale changes in complex materials.
Twisted Light, Robust States: Engineering Topology with Synthetic Dimensions
![The study demonstrates that in a nonlinear orbital angular momentum lattice, antisymmetric edge states remain stable regardless of nonlinearity strength, while symmetric edge states-present under weak nonlinearity-transition into bulk states and ultimately vanish beyond a critical nonlinearity threshold, a boundary clearly delineated by the system’s parameters [latex]U=gN_{edge}[/latex], [latex]J=1[/latex], and [latex]\delta J=0.3[/latex].](https://arxiv.org/html/2601.02199v1/x10.png)
Researchers have discovered a new way to create robust quantum states by harnessing nonlinearity in custom-designed ‘synthetic’ lattices of light.
The Arrow of Time in an Expanding Universe
New research suggests the need for an ‘observer’ in de Sitter space quantum gravity stems from a fundamental symmetry breaking within the vacuum itself.
The Harmony of Imperfection: A New Framework for Design and Discovery
A novel approach links the principles of physical vibration and musical composition, revealing a shared generative logic across materials, creativity, and intelligence.
Cosmic Dawn of Particles: A New View of Creation
![The study demonstrates that particle production in a massless scalar field theory, initially predicted by analytical calculations and observed through the evolution of excited state probabilities, is suppressed by even slight interactions introduced via fermion mass, a phenomenon signaled by a decreasing ratio of measured to free-theory probabilities and momentarily obscured by state mixing during rapid level crossings-effects quantified within a system defined by [latex]N=20[/latex], [latex]a=1[/latex], and a lightest meson mass of [latex]M\_1=0.25[/latex].](https://arxiv.org/html/2601.02331v1/x12.png)
A novel computational approach reveals how particle creation in the early universe is shaped by fundamental interactions and expanding spacetime.