Physical Review X
LightNews LightNews
banner
physrevx.aps.org
Physical Review X
@physrevx.aps.org
140 followers 5 following 84 posts
@apsphysics.bsky.social's open access journal for cutting-edge research across physics and adjacent fields
Posts Replies Media Videos
physrevx.aps.org
🌀 A new paper tackles a weak point in neural-network quantum simulations by introducing blurred sampling, which restores stable optimization and accurate real-time dynamics with minimal overhead.

Check it out: https://go.aps.org/4xqC8bo
Two side-by-side 3D surface plots shaped like curved valleys, shaded blue in the center and red near the upper edges. Both are labeled with a curved line marked "𝒩" running across the surface. The left is labeled p(x) and shows several black dots scattered across the surface and a black curved line drawn along the “valley” floor. The right is labeled r(x') and shows a red arrow labeled "Blur" pointing from a curved solid line to a curved dashed line with red dots. Curved black arrows show dots moving from open circles to new positions on the dashed line.
September 16, 2026 at 12:00 PM
physrevx.aps.org
Scanning tunneling spectroscopy and theoretical modeling reveals a new mechanism that flattens the mixed-type saddle point of a Kagome lattice on the surface of Co3Sn2S2 into a higher-order van Hove singularity.

Read more: https://go.aps.org/4y2LbAK
Scientific Illustration with four sections: A, B, C, D. Section A is a topographic image of the Co3Sn surface with kagome lattice. A blue rectangle with honeycomb pattern is labeled 'Topography'. It has a small hexagram on top, with 3 balls at 3 points, then 2 balls to its right, 2 balls to its left. The scale bar is labeled 1nm. Section B features six topographic images of the same lattice, each with the same pentagram and balls but the honeycomb patterns are blurred and orange. Starting from the left, each of the six lattices is labeled: -250 meV, -115 meV, -70meV, -25meV, 0meV, and finally 200meV. Lattices 3, 4 and 5 also have label underneath that says 'symmetry broken'. Section C is a graph with amplitude (au) on y axis and E (meV) on x axis. Three lines - red, green and blue display three Bragg peaks. Section D is a graph with phase on y axis, going from 0 at the bottom to 4π at the top and E (meV) on x axis, going from -200 to 200. The bragg peaks are red, green and blue.
September 15, 2026 at 7:03 PM
physrevx.aps.org
A new study shows that active cavity feedback cuts polariton decay rates by more than 10x, boosting cooperativity and enabling strong photon-magnon-phonon coupling. These results overcome a major material limit for hybrid quantum systems.

Read more: https://go.aps.org/3TsHhlu
A plot of linewidth versus feedback gain. There are three lines going across it. One line connecting orange diamonds shows the intrinsic magnon dissipation rate, which stays nearly constant. One line connecting blue squares shows the effective cavity linewidth, which decreases with feedback. Between them, a line with red circles and green stars shows the lower- and upper-polariton linewidths, respectively. Both decrease as feedback increases, falling below the magnon dissipation rate, showing that feedback can suppress polariton losses beyond the material limit.
September 14, 2026 at 7:22 PM
physrevx.aps.org
Flexible filaments under oscillatory shear don’t just bend and bounce back: they settle into one of two coexisting attractor states and randomly hop between them. New study combines actin experiments with simulations.

Read more: https://go.aps.org/4hdIOnw
A grid of five rows, each showing a filament's shape across one oscillation cycle. Each row has two panels of five frames. Top frames show white fluorescent microscopy images of a glowing actin filament on a black background. Bottom frames show matching black line-tracing on a gray background. Left and right panel groups are separated by a thick vertical line, colored red if the filament is buckled at that point or blue if straight. Across the five rows, the filaments start straight and progressively bend into varied curves and S-shapes.
September 14, 2026 at 5:19 PM
physrevx.aps.org
A new study shows that the surface of antiferromagnets can develop 2D altermagnetism, greatly increasing the number of materials that might have this useful property. The finding provides a new way to create very thin, 2D magnetic materials.

📄 https://go.aps.org/3Toh73i
A graph showing the electronic states at a material’s surface. The x-axis shows momentum along a high-symmetry path on the surface, and the y-axis is labeled E/J. One pair of red and blue lines (with colors depicting spectral weight in the spin-up and down channels, respectively) wiggles across the upper portion near a dashed yellow line that goes straight across at 0.8 E/J, and another pair wiggles across the lower portion roughly centered on -1 E/J, showing surface spin splitting.
September 11, 2026 at 8:00 PM
physrevx.aps.org
This paper finds that angular momentum imposes crucial constraints on configuration space of quantum quadrupoles, opening the door to a new wave of investigations exploring multipoles in pyrochlore materials.

Get the details: https://go.aps.org/4yyDBxu
Scientific figure. Eight tetrahedra, four on top row, four on bottom row; each with red and blue quadrupolar orbitals at four points. Top left: “A1.” Magenta arrows pointing outward from each orbital. Top middle left: “T2, planar.” Arrows pointing up. Top middle right: “T1.” Top two arrows point up and down. Bottom two arrows point up and down. Top right: “Epsi3.” Top two arrows point left and right. Bottom left arrows point inwards into the shape. Bottom right arrow points leftwards. Bottom left: “T2, ice.” Top two arrows point outwards. Two bottom arrows point inwards. The final three shapes in the bottom row have green arrows. Bottom middle left: “T2, planar.” Four arrows point up. Bottom middle right: “T1.” Top two arrows point up and down. Bottom two arrows point up and down. Bottom right: “Epsi2.” Top two arrows point up. Bottom arrows point down. All shapes are labeled “(t2g),” except for the final 3, labeled “(eg).”
September 11, 2026 at 5:48 PM
physrevx.aps.org
A new study presents a theoretical framework showing that isolated quantum systems never fully erase their past. Instead, they leave behind quantum birthmarks — persistent memories of a system's initial state and early dynamics.

Learn more: https://go.aps.org/4xn5lnV
A depiction of a quantum birthmark. The figure displays the long-time average of the probability density for a Gaussian wavepacket initialized along a bowtie quantum scar at the center of a stadium billiard.
September 10, 2026 at 5:59 PM
physrevx.aps.org
Contrary to established wisdom, a new study reveals that kagome superconductors possess local magnetic moments that influence their electronic properties and provide an explanation for observed broken time-reversal symmetry.

Read the paper: https://go.aps.org/4r5jWTm
A series of sketches illustrating four Kagome lattices (a, b, c, and d), represented as simple, triangular-shaped outlines with various interior lines. Panels (a) and (c) are labelled as geometrically frustrated and contain an internal lattice of grey lines intersecting with pink arrows pointed in various directions. Panels (b) and (d) are labelled as frustration relieved and contain an internal lattice of green and orange lines intersecting with pink arrows pointed in similar directions.
September 10, 2026 at 3:47 PM
physrevx.aps.org
In a general quantum-circuit framework for Wigner’s friend scenarios, all Frauchiger-Renner-like paradoxes are resolved while remaining consistent with causality principles — overcoming key challenges in these scenarios without altering the Born rule.

🔗 https://go.aps.org/4hgE6X4
September 9, 2026 at 7:23 PM
Reposted by Physical Review X
physicsmagazine.aps.org
🧪 A new asymmetric interface turns platinum into a quantum filter for spin currents, producing the orientations needed for field-free magnetic bit switching.

Read the Synopsis: https://go.aps.org/4x8Vf9Z
Illustration of spin-polarized electrons passing through an engineered platinum interface, with arrows showing spins being reoriented out-of-plane as they pass through a quantum filtering layer above a crystal lattice structure.
September 3, 2026 at 3:24 PM
physrevx.aps.org
By applying dynamic topological landscapes to a mixture of starfish embryos, scientists developed a flowstate framework that quantifies how nonreciprocal transitions sculpt the architecture of active and living matter.

Read more: https://go.aps.org/4r3NH71
A video showing a binary mixture of starfish embryos moving about under a microscope, with overlaid arrows denoting their two-minute trajectories. E1 embryos are colored blue and E2 embryos are colored red.
September 8, 2026 at 3:09 PM
physrevx.aps.org
A team observes the transverse polarization of the Lambda-c baryon produced via electron-positron annihilations in the BESIII detector, providing valuable tests of the strong and electro-weak theory in the Standard Model.

Read the paper: https://go.aps.org/4yovAv2
A series of three graphs plot the 2D density distributions of |A| and |B|, with |A| on the x-axis and |B| on the y-axis. Each graph contains an oval-like, blue-shaded region, which represents the distribution of |A| and |B| obtained in the new paper. The graphs also contain an array of circular, square, and plus-shaped markers of various colors, which denote theoretical calculations and experimental measurements from previous papers.
September 4, 2026 at 3:31 PM
physrevx.aps.org
New research bridges a persistent gap in spintronics by demonstrating a spin-orbit filtering mechanism for unconventional spin current generation and efficient, field-free switching through crystal symmetry engineering.

Read more: https://go.aps.org/4h7SaC7
A molecular schematic displaying the noncollinear spin-orbit filtering effect in a high-symmetry interface (grey rectangular cuboid). Purple arrows on the surface of the cuboid denote the Rashba-Edelstein field, with one straight arrow pointing in the direction of a smaller set of arrows arranged in a circle. A brown arrow pointing in the x-direction represents the charge current Jc, while grey arrows pointing up and to the left represent the resulting orthogonal spin currents Js1 and Js2. Trios of red spheres with red arrows running through them denote σ, found alongside the orthogonal spin currents. The cuboid also contains a smaller cube at the bottom right, formed by interspersed grey spheres.
September 3, 2026 at 2:47 PM
physrevx.aps.org
A new unified framework combines principles of locality and generalized noncontextuality into a method to detect any entangled state, providing a novel tool for gauge-independent entanglement certification with wide-ranging applications.

Read the paper: https://go.aps.org/4qMwqiF
A sketch of the bipartite states 𝜌AB, visualized as a circular (left) and compressed oval shape (right). On the left, the circular sketch is composed of various overlapping circles denoting all quantum states (purple), local states (yellow), unsteerable (light red), separable (orange), and classical (red). Each of these internal circles is connected by arrows indicating its equivalence to being classical relative to one of various subsets of operational identities. On the right, the compressed oval sketch contains similar internal layers, with the central layer labelled as separable (orange).
September 1, 2026 at 6:34 PM
physrevx.aps.org
Optically driven yttrium barium copper oxide shows puzzling magnetic signals at high temps. New theory ties this to a flux-Floquet instability, not light-induced superconductivity — evidence for preformed Cooper pairs in the pseudogap phase.

Read more: https://go.aps.org/4cVn8ej
A sketch of the crystal structure of yttrium barium copper oxide looks like a sandwich structure, with the top and bottom each consisting of two layers of copper oxide separated by an yttrium atom, and the center composed of two barium atoms.
August 31, 2026 at 8:47 PM
physrevx.aps.org
A team has engineered efficient quantum algorithms that can symmetrize non-strictly increasing integer lists, which could tackle open problems in low-depth symmetrization and inform applications like quantum telescope arrays.

Read the paper: https://go.aps.org/4d6vhfV
A figure visualizing a permutation-lower exceeding sequences (LES) diagram, illustrated as a 6-by-6 grid of black squares. The diagram corresponds to σ(123456) = 436125, listed on the x-axis, and the corresponding LES of 121153, listed on the y-axis. The grid contains colored outlines denoting smaller rectangular sections of varying sizes. The colors include red, yellow, green, blue, orange, and purple, and indicate the corresponding element of the LES on the y-axis (1 = blue, 2 = green, 1 = orange, 1 = purple, 5 = yellow, 3 = red).
August 31, 2026 at 6:32 PM
physrevx.aps.org
Researchers prepared a simple and efficient protocol for quantum thermal state preparation that leverages “quantum detailed balance” conditions and show its utility for quantum simulation in the 2D quantum Ising model.

Read the paper: https://go.aps.org/4cLqTms
A simple diagram illustrates the protocol for quantum thermal state preparation. Stage (i) involves initializing a bath of auxiliary qubits in the |0⟩ state, denoted by a black rectangle with a single red line and four blue lines emerging from it. Stage (ii) shows the joint unitary evolution, while stage (iii) displays the reset of the bath qubits, indicated with a recycle sign. Stage (iv) displays the randomization step that suppresses unwanted system coherences, represented by another black rectangle with blue lines running out from it. At the bottom, a wave-like line represents the filter function f(τ).
August 28, 2026 at 7:34 PM
physrevx.aps.org
A new study uses femtosecond trPOT to build one of the first reconstructions of an exciton wave function, establishing an experimentally accessible approach to visualize these functions with high spatial, phase, and temporal resolution.

🔗 https://go.aps.org/4xuDEKG
A 3D structural model portrays the four-monolayer film used in the experiments. It displays four monolayers of 6T (yellow elongated shapes) on the Cu(110)-(2 x 1)O substrate. A label on one of the monolayers indicates how the molecular planes are tilted by 32 degrees with respect to the sample surface, which is composed of oxygen atoms (smaller red spheres) interspersed among a field of copper atoms (larger gray spheres). The model also illustrates the angular distribution of the emitted electrons, as well as the normal incidence pump (blue) and p-polarized probe (red) pulses.
August 28, 2026 at 5:43 PM
physrevx.aps.org
Living systems operate out of equilibrium to enable rich, complex behaviors.

To quantify how far from equilibrium a system is, a study proposes a simple method that tracks and categorizes individual molecules’ displacements.

Read more: https://go.aps.org/4hWqD7Q
The structure of the talin-1 protein represented as curly ribbons in red, orange, yellow, greens, and blues.
August 26, 2026 at 7:42 PM
physrevx.aps.org
A new study shows metastable materials undergo aging, degradation, and structural relaxation even in controlled environments without external stimuli, placing important constraints on functional materials.

Read the paper: https://go.aps.org/4xsxlHA
A plot showing Hall carrier concentration of the texted material versus temperature at six different points during its storage time: as sintered, one month, 1.5 months, six months, one year, and two years. Each successive measurement falls slightly below its preceding one.
August 26, 2026 at 4:10 PM
physrevx.aps.org
A new study reports a hardware-efficient, error-resilient demonstration of a quantum routing network — a step towards achieving a scalable, resilient bucket-brigade quantum random access memory.

Read the paper: https://go.aps.org/4ccVSI1
A schematic of the design of a quantum router. An input qubit, control qutrit, and two path qubits are represented by green circles organized in a tree, with the input at the top, the control in the middle, and the two paths on the bottom. A double-sided arrow points from the input to the left path, and another from the input to the right path, indicating the swap operation that routes the input based on the address state of the control qutrit.
August 26, 2026 at 11:37 AM
physrevx.aps.org
🔗 How do you bound quantum correlations when real devices are imperfect? A new paper introduces the relaxation method block moment matrices, which matches or beats prior best-known bounds in real-world scenarios.

Read more: https://go.aps.org/4itGxqb
A line chart with two y-axes plotting several curves against a shared x-axis labeled ω, ranging from 0.00 to 0.08. The left y-axis, labeled Wd, ranges from 0.75 to 1.00. The right y-axis, labeled Ps in purple, ranges from 0.4 to 0.7. A horizontal gray dashed line sits at the top of the chart. Four colored solid curves rise from left to right, all starting between about 0.72 and about 0.86: red (W2), blue (W3), tan (W4), and green (W5). A purple dashed curve (EHesse) rises across the plot, tracked against the right y-axis.
August 25, 2026 at 7:23 PM
physrevx.aps.org
⚛️ A new study presents an AFQMC method that cuts the costs of simulating solids to match diffusion Monte Carlo. It reaches thermodynamic and basis-set limits without empirical corrections.

Read more: https://go.aps.org/4caAhjv
A 3D lattice of large gray spheres and smaller red spheres connected by thin gray lines. The gray spheres contain vertical arrows pointing up, colored blue, or down, colored orange.
August 25, 2026 at 4:17 PM
physrevx.aps.org
Scientists combine a powerful neural network wavefunction and a new DVMS algorithm to derive solutions for the ground state in molecules and solids — presenting a novel framework to parse many-body electronic structure.

Read the paper: https://go.aps.org/4c6qJpw
A visualization of the Periodic Dynamic Voronoi Metropolis Sampling process. Panel (a) displays a rectangle split into regions of varying colors, which represents a periodic Voronoi diagram generated from the sites. The diagram partitions the space and constrains sampling to specific cells (red regions) and black circles represent the sites. Above, a plot illustrates the spatial probability distribution for electrons in x, y, and z dimensions where red circles represent electron’s walkers. An arrow points to panel (b), which provides a sketch of the 2D periodic COM calculation algorithm with marks for walkers (blue dots), incorrect COM (red x’s), and correct COM (red stars). Below are visuals of a longitudinal cylinder and a transverse cylinder, which give rise to the position expectation of the walkers, XCOM and YCOM. These form a new site and complete an iteration as indicated by an arrow pointing back towards the periodic Voronoi diagram.
August 24, 2026 at 5:48 PM
physrevx.aps.org
Using single-crystal scattering experiments and machine learning simulations, a study shows how ions move collectively through superionic crystals — revealing correlated ion motion and lattice vibrations that drive superionic conductivity.

🔗 https://go.aps.org/45AX6ZX
August 21, 2026 at 7:31 PM