Spacetime’s Uncertainty: Quantum Limits Near Black Holes
![The study investigates entropic uncertainty relations within a Werner state [latex]\hat{\rho}\_{A{B\rm{{}\_{I}}}{C\rm{{}\_{I}}}}^{\rm Werner}[/latex] situated in a Schwarzschild black hole, demonstrating how this uncertainty-and its lower bounds, including a newly proposed one-varies predictably with both distance [latex]R\_{0}[/latex] and Hawking temperature [latex]T[/latex], under conditions of purity [latex]p=0.5[/latex] and a state parameter [latex]z=\frac{{\sqrt{2}}}{2}[/latex], as quantified by the [latex]l\_1[/latex]-norm.](https://arxiv.org/html/2602.11503v1/x15.png)
New research explores how fundamental quantum uncertainty principles are affected by the extreme gravity of Schwarzschild black holes, revealing a link between spacetime and quantum coherence.
Science
Seeing Beyond the Average: A New Microscope for Quantum Matter
Researchers are developing a matter-wave microscope capable of directly visualizing the subtle correlations that define exotic states of quantum matter.
Hunting Bugs in Quantum Code
![The framework, [latex]\text{SB-QOPS}[/latex], defines a measurement process through a set comprising a Pauli family [latex]\mathit{F}[/latex], its corresponding eigenvalues [latex]\mathit{EV}[/latex], and a designated measurement outcome [latex]\mathit{M}[/latex] determined by a compact program specification [latex]\mathit{PS\_{compact}}[/latex], effectively linking abstract quantum operations to concrete measurement results.](https://arxiv.org/html/2602.11487v1/Overview.png)
A novel search-based testing approach dramatically improves the detection of errors in quantum circuits, bringing us closer to reliable quantum computation.
Quantum Echoes: Steering Entanglement in Particle Collisions
![The study details a coordinate system transformation for analyzing the decay of [latex]e^{+}e^{-}\rightarrow\gamma^{\*}/\psi\rightarrow Y\bar{Y}[/latex], establishing a consistent chirality between hyperon Y and antihyperon [latex]\bar{Y}[/latex] through defined axes-[latex]{\hat{\mathbf{x}}, \hat{\mathbf{y}}, \hat{\mathbf{z}}}[/latex] for Y and [latex]{\hat{\mathbf{x}}^{\prime}, \hat{\mathbf{y}}^{\prime}, \hat{\mathbf{z}}^{\prime}}[/latex] for [latex]\bar{Y}[/latex]-derived from momentum vectors and cross-product calculations, ensuring a mirrored relationship where the antihyperon’s axes are inversions of the hyperon’s.](https://arxiv.org/html/2602.10389v1/x1.png)
New research demonstrates control over quantum entanglement and Bell nonlocality in hyperon-antihyperon pairs created from polarized electron-positron annihilation.
The Edge of Order: How Quasiperiodicity Shatters Localization
![The system exhibits tunable, non-reciprocal hopping-characterized by strengths of [latex]J e^{\pm\alpha}[/latex]-coupled with a quasiperiodic onsite potential [latex]\lambda_{j}[/latex], and further refined by an impurity bond whose hopping strength is adjustable via parameter μ.](https://arxiv.org/html/2602.11155v1/x1.png)
New research reveals how introducing quasiperiodic order into non-Hermitian systems can dramatically alter electron behavior, leading to either extended states or the emergence of the non-Hermitian skin effect.
Squeezing Vacuum: A New Limit for Measuring Light’s Interaction with Nothing
Researchers have demonstrated a novel technique to suppress noise in interferometric measurements, pushing the boundaries of our ability to detect the subtle nonlinear effects of the quantum vacuum.
Quantum Echoes: How Hyperon Decay Reshapes Entanglement
![The study defines helicity angles for the decay process [latex]e^{+}e^{-}\to Y\bar{Y}[/latex], where Y subsequently decays into a Lambda baryon and a pion, establishing a consistent framework applicable to both the initial particle pair and the resulting anti-baryon-pion combination.](https://arxiv.org/html/2602.10398v1/diagram_new.png)
New research demonstrates that entanglement between hyperons and anti-hyperons can be dynamically altered through sequential decay processes, potentially leading to enhanced quantum correlations.
Beyond Symmetry: The Rise of Nonreciprocal Interactions
This review explores how breaking the symmetry of interactions in many-body systems leads to fundamentally new physics and exotic states of matter.
Wave Mixing in Bose-Einstein Condensates Opens New Paths for Quantum Control
![Four-wave mixing (FWM) experiments demonstrate momentum state manipulation in atomic gases, utilizing sequential Bragg pulses at [latex]790.00\ \mathrm{nm}[/latex] to generate distinct momentum states [latex]\mathbf{p}\_{1}, \mathbf{p}\_{2}, \text{ and } \mathbf{p}\_{3}[/latex] from a single spin component, and, with a [latex]769.35\ \mathrm{nm}[/latex] lattice configuration and a bias magnetic field, to reveal symmetric momentum transitions [latex]\lvert\pm 2\hbar k\rangle[/latex] within a two-spin component system, evidenced by the formation of scattered wave packets visualized through absorption imaging.](https://arxiv.org/html/2602.10873v1/x1.png)
Researchers have demonstrated precise control over matter-wave four-wave mixing in a potassium Bose-Einstein condensate, paving the way for advanced quantum technologies.
Dark Matter’s Grip on Spinning Black Holes
![The study demonstrates how a surrounding dark matter halo, modeled with a Hernquist density profile and anisotropic distribution, subtly alters the expected inertial frame dragging effect - specifically, the angular velocity [latex]\omega(r)[/latex] - deviating from the vacuum prediction and manifesting as a measurable shift in the spacetime geometry around a slowly rotating massive object.](https://arxiv.org/html/2602.10579v1/x2.png)
New research explores how surrounding dark matter halos warp the spacetime around slowly rotating black holes, altering orbital dynamics and influencing gravitational wave signatures.