Bilayer nickelate spin waves match Heisenberg stripe model
La3Ni2O7 shows narrower bandwidth than cuprates but comparable fluctuating moment from enhanced local susceptibility.
· “Nature of magnetism in bilayer nickelate La3Ni2O7 single crystals”
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Strongly Correlated Electrons
Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
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A magnetic field stabilizes superconductivity in hexalayer graphene
The same bubble-like charge pattern behind re-entrant quantum Hall states also hosts superconductivity.
Repulsive forces may drive cuprate superconductivity
After 40 years, theories converge on this idea with three schools, a key 2022 result, and refreshed experimental dogmas.
· “40 years of cuprate high-Tc superconductors: a perspective on theories”
Body-centered tetragonal lattice frustrates harmonic and solitonic magnetism
In GdAlSi an applied field switches between cycloidal and double-Q states whose X-ray signatures match mean-field theory.
Field-induced excitations create zero-magnetization plateaus
In antiferromagnetic spin-dimer chains the applied field generates local excitations that produce the plateau without single-ion anisotropy.
Concave partition removes spurious TEE in stabilizer codes
For translation-invariant prime-qudit codes the Levin-Wen formula now gives exact topological entropy without boundary overestimation.
· “Resolving spurious topological entanglement entropy in stabilizer codes”
Freeze-shock yields 1300 μm² clean rhombohedral graphene
90% yield, 200 μm mean free path, and uniform magnetism open correlated nanoelectronics
· “Cryogenic shock exfoliation for ultrahigh mobility rhombohedral graphite nanoelectronics”
Kerr imaging reveals movable altermagnetic domains in MnTe
Two distinct time-reversal symmetry breaking regions produce large optical rotations and shift under magnetic fields or heat despite near-c零
· “Magneto-optical imaging of macroscopic altermagnetic domains in MnTe”
Simulations establish stable charge-4e superconductivity at zero temperature
In the attractive SU(4) Hubbard model, quartet order replaces pair order at strong coupling through a non-Landau transition whose exponents
Biquadratic and anisotropy terms needed for Mn phosphate 1/3 plateau
Fitting magnetization data shows both interactions must be present to match susceptibility transitions and specific heat.
· “Microscopic model for the ground state, 1/3 plateau and excitations of γ-Mn₃(PO₄)₂”
Topology shifts frequency of quantum Sondheimer oscillations
The shift encodes the full Landau level ladder directly, unlike phase-only effects in Shubnikov-de Haas oscillations.
· “Probing topology in thin films with quantum Sondheimer oscillations”
Pressure raises nickelate Tc linearly to near 77 K at 90 GPa
Freestanding membranes show a steady 0.65 K per GPa increase with no saturation up to the highest pressures measured.
· “High-temperature superconductivity in Nd_(0.85)Sr_(0.15)NiO₂ membranes under pressure”
Flat band persists from bulk to few layers in NbOCl2 and TaOCl2
A momentum-independent band seen at room temperature offers a moiré-free route to correlated-electron states.
· “Robust Orbital-Selective Flat Bands in Transition-Metal Oxychlorides”
Exact wavefunction found for time-dependent Kondo model
Full many-body state is built from quantum Knizhnik–Zamolodchikov difference equations for a family of swept couplings.
· “Exact many-body wavefunction of the Kondo model with time-dependent interaction strength”
Nagaoka ferromagnet destabilized by kinetic frustration above critical t'/t
DMRG reveals quantum phase transition to spiral spin-density wave evolving into Haerter-Shastry antiferromagnet, robust at finite hole
· “Instability of Nagaoka State and Quantum Phase Transition via Kinetic Frustration Control”
Bethe equations are saddle points of an irregular CFT block
The Richardson Yang-Yang function matches the block's, so conformal-block power series can replace direct Bethe solving.
· “2D CFT and efficient Bethe ansatz for exactly solvable Richardson-Gaudin models”
ErB2 orders as an easy-plane ferromagnet at 14 K
Single crystals reveal basal-plane moments, a hard c-axis, and a 12-T spin-flip
· “Easy-plane ferromagnetism in single-crystal ErB₂ at low temperatures”
At one Dirac cone, an entanglement number locks to one-half
A wavefunction-only probe reads off the parity anomaly in gapless 2D matter, converging to 1/2 with power-law corrections.
· “Parity Anomaly as Modular Commutator with Massless Dirac Fermion”
Flat charge-conjugation symmetry forces real anyon F-symbols
The result unifies known real gauges and predicts them in self-dual Chern-Simons theories.
· “Reality and Complexity of F-symbols in 2+1d Topological Phases”
Spin sharpening and entanglement coincide in SU(2) circuits
A loop-model theory predicts a single transition, with no area-law phase and learning times scaling as L^3 or L^2.
· “Statistical Mechanics of Non-Abelian Learnability Transitions”
Metastable chiral domain walls pinned in a topological magnet
Twisted MoTe2 holds spin textures for tens of microseconds, exposing a quantum-geometry route to long-lived order.
· “Observation of metastable chiral domain walls in a topological magnet”
Small s squared controls expansion for correlated electron transport
In the limit of concentrated momentum space, long self-avoiding paths dominate to enable analytic calculations of spectra and finite DC
· “Controlled expansion for correlated electrons with concentrated kinematics”
Nickelate shows four-unit-cell stripes with 66 meV gap and switchable dynamics
Tunneling electrons above 20 meV trigger phase slips for atomic-scale imaging and highlight cuprate-like correlations.
Spin kernel computation shows warm-dense LSDA mismatch
Long-wavelength limit of the finite-temperature spin XC kernel agrees with LSDA spin stiffness at low T but exposes a residual when warm and
· “Finite-Temperature Spin Exchange-Correlation Kernel of the Uniform Electron Gas”
Quasihole Laughlin bundles yield Chern classes matching Berry phase split
The decomposition into Aharonov-Bohm and fractional statistical terms follows from Grothendieck-Riemann-Roch applied to the symmetric power.
· “Chern classes of Laughlin bundles on the quasihole moduli space”
Chiral magnons observed and switched in altermagnet MnTe
Polarized neutron scattering shows magnetic-field reversal of handed spin waves in a zero-net-magnetization material.
· “Observation of Switchable Chiral Magnons in an Altermagnet”
Open boundaries make Ising duality exact and invertible
Exact duality requires an anomalous edge degree of freedom and resolves apparent Elitzur violation via differing perturbation sensitivities.
· “Invertible Symmetry and Spontaneous Duality Breaking in the Transverse-Field Ising Model”
Anisotropic electrons melt one-dimensionally in ReSe2
STM images reveal oblique Wigner lattice at low density that melts along the light-mass direction first, leaving a smectic phase.
· “Imaging Interacting Two-Dimensional Anisotropic Electrons”
This paper reports evidence that a triangular-lattice magnet
TlYbS2 shows a continuous, field-driven transition from an antiferromagnet with magnons to a gapless quantum spin liquid with a spinon…
· “A continuous confinement-deconfinement transition in a triangular quantum magnet”
CeCo2Ga8 lands in the 1D Kondo lattice's incommensurate phase
Neutron, photoemission, and DMRG results match a predicted incommensurate spin phase in a cerium chain metal.
· “Incommensurate spin fluctuations in one-dimensional Kondo metal CeCo2Ga8”
One in-gap impurity links distant valley Hall islands
A single resonant impurity can act as a coupler between protected valley modes in bilayer graphene.
Kitaev spin liquid magic computed exactly via Majorana fermions
The exact Majorana mapping makes stabilizer magic of spin liquids tractable at scale.
Moore-Read order keeps its count under skin effect
The sixfold Moore-Read count stays fixed through γ=0.55–0.74, then collapses past a geometry threshold.
· “Fate of the non-Abelian Moore-Read manifold under the non-Hermitian skin effect”
Ca2CuWO6's spins order in one of Sr2CuWO6's four domains
Triclinic Ca2CuWO6 keeps the tungsten-mediated motif of Sr2CuWO6; symmetry then picks one magnetic domain.
· “Quasi two dimensional magnetic structure of the triclinic double perovskite Ca₂CuWO₆”
Two half-filled states in twisted bilayer graphene are strictly stable
A mismatch in band Chern numbers forces every neutral orbital variation to cost positive energy, a soft spectral gap.
S-matrices alone can fix time-dependent integrable interactions
Chiral kinematics and spatial homogeneity force an affine spectral trajectory; the inverse Cayley transform then sets the couplings.
· “General Construction of Time-Dependent Integrable Chiral Field Theories”
One projector sorts non-Hermitian flat bands into four classes
Continuity locks all three Chern numbers; a pole lets them differ and supercharges resonant transfer.
All quantum-group fusion categories admit split real forms
The bar involution plus quasi-R-matrix gives real F-matrices for every simple Lie algebra and level, but the braiding does not descend.
Rydberg spins gain a universal position-locked coupling
Choosing principal quantum numbers two apart turns Rydberg interactions into spin-position-locked exchange.
Two moiré bands decide which fractional states survive in MoTe2
Two-band exact diagonalization matches the measured FCI sequence and the ν=-1/3 CDW ground state
A π flux imprints an interference pattern visible in STM tunneling
In a Kitaev spin liquid, the oscillation measures the −1 braiding phase of Majorana fermions circling the flux.
· “Flux-induced Aharonov-Bohm Oscillation in the Tunneling Spectroscopy of Kitaev Spin Liquids”
4-sphere hosts quaternionic band geometry
Even with extra bands, a single quaternionic band on T^4 always develops a quantum-metric degeneracy.
· “Quaternionic Hermitian Band Geometry in Four Dimensions: Realization on S⁴ and Obstruction on T⁴”
Interactions alone create a topological altermagnetic insulator
Neither Ising spin-orbit coupling nor pre-set magnetic order is needed; both emerge from repulsion.
· “Interaction-mediated Co-existence of Altermagnetism and Topology”
Phonon frequency, not just coupling, decides whether bipolarons freeze
A 2D Holstein-model simulation finds Ω/t=0.5 bipolarons freeze into CDW domains, while at Ω/t=2 they stay mobile.
· “A DQMC study of the spectral and conductive properties of the two-dimensional Holstein model”
Metal islands raise exciton binding by 241 meV
Isolated metallic regions in PdxCu1-xCrO2 bind electron-hole pairs tighter until a continuous metal network forms.
· “Anomalous stabilization of excitons by metallic proximity”
Density matrices, not Hamiltonians, set QMC's true scope
One unified framework now computes entropies, negativities, and quantum magic in large sign-free systems.
· “Quantum Monte Carlo in the Age of Many-Body Quantum Information”
Tensor-train trick unlocks sixth-order strong-coupling diagrams
The new scheme cuts bond dimensions fivefold, letting DMFT reach fourth-order self-consistent spectra.
· “Quantics tensor cross interpolation for high-order strong-coupling expansions”
Magnetic order sets the crystal and orbital structure of iron ladders
Block order in BaFe2Se3 forces a Pc lattice and Fe4Se cluster orbitals that suppress conduction.
· “Interplay of Magnetic Order, Structural Stability, and Orbital Ordering in BaFe2X3 (X = S and Se)”
One untuned protocol handles H2O
Importance reweighting keeps the variational objective fixed while letting sampling and evaluation be tuned independently.
· “Importance-Reweighted Fock-Space Variational Monte Carlo”
Multi-orbital gap functions escape even-odd symmetry rule
Revised exchange rule for pairing electrons allows complex gap states that break time reversal, found in Sr2RuO4.
This paper proposes quantum circuits that prepare spin eigenstates
The authors generalize Bärtschi and Eidenbenz's Dicke-state circuits to deterministically prepare arbitrary spin eigenfunctions encoded by…
· “Deterministic Preparation of Arbitrary Spin Eigenfunctions”
This paper uses 195Pt NMR to show that in Pt-Ni and Pt-Pd nanoparticles
In Pt-Ni and Pt-Pd nanoparticles, the characteristic temperature T* of the quantum size effect scales with the Kubo gap, showing that…
· “Role of d-electron density of states in the quantum size effect of Pt-Ni and Pt-Pd nanoparticles”
Magnetic energy peaks obey impedance matching
Spin-phonon drag, not the bare triplon density of states, sets where laser power enters the magnetic sector.
· “Anomalous dynamical energy flows via nonlinear phononics in spin-Peierls chains”
This paper road-tests six density-functional approximations on four noncollinear magnetic…
Only the two spin-current DFT functionals tested reproduce the experimental noncollinear magnetic order of NiS2, while standard locally…
Snapshots at one position map the quasihole's full geometry
One measured distribution plus the known amplitude ratios fixes all complex overlaps and local geometry.
· “Laughlin quasihole geometry from a single snapshot ensemble”
Compressing DyPtBi removes conducting magnetic domain walls
A 14% resistivity jump under compression points to gapless, current-carrying states at magnetic interfaces.
A doublon-pair filter: electrons bounce
In a resonant extended Hubbard model, a pinned double-doublon transmits singlet pairs and completely reflects single electrons.
It takes uneven exchange to break the Aharonov-Bohm cage
Only uneven nearest-neighbor exchange starts the escape; long-range terms reshape it, not trigger it.
Resistance kinks track a vanishing spin wave in a rare-earth magnet
A high-entropy kagome magnet reveals that its nonmonotonic magnetoresistance is tied to an incommensurate spin texture.
100 snapshots pinpoint the ergodicity-breaking transition
Snapshot dimension and scale-free networks separate ergodic, critical, and non-ergodic regimes of the quantum sun model.
· “Many-body ergodicity breaking from wavefunction snapshots”
Spinons drive herbertsmithite's 260 mK spin glass
One fitted parameter matches every measurement, and a low-temperature neutron scan could tell the two spin liquids apart.
· “Theory of the Spinon-Mediated Witness Spin Glass in Herbertsmithite”
A spin ladder's triplons condense at 0.17 tesla
Its zero-field state is quantum-disordered, and the tiny gap lets field-induced order appear at ultralow field.
· “Ultralow-Field Triplon Condensation in a Spin-Ladder Magnet”
Neural networks now solve quantum magnets and Hubbard models
A best-practice review shows how NQS beat the sign-problem barrier in frustrated and doped systems.
· “Neural quantum states in condensed matter: advances, best practices, and prospects”
Two distinct gaps drive the cuprate mid-infrared spectrum
A magnetic pseudogap and the Mott-Hubbard gap leave distinct, separable signatures in cuprate optical spectra.
· “Two distinct gap structures in the mid-infrared optical conductivity of the Hubbard model”
Flat phonons may localize electrons in a kagome insulator
In Rb2Ni3S4, a 333.7 cm^-1 overtone ladder carries a 40.6 cm^-1 comb, a signature of electron-vibrational self-trapping.
· “Emergent Vibronic Spectral Hierarchy in a Kagome Flat-Band Insulator”
An overlap identity yields Berry-curvature currents
A two-band kinetic equation turns band-overlap matrix elements into the Berry curvature behind heat and thermoelectric currents.
Quantum geometry separates pair size from coherence length
Geometric terms reach a third of pair size and 40% of coherence length, and the two lengths diverge across the crossover.
· “Pair size versus coherence length and quantum geometry in the spin-orbit coupled BCS-BEC crossover”
Monolayer TaIrTe4's van Hove peak sits where transport shows nothing
Photoemission maps the low-energy bands, finds weak correlations, demoting van Hove physics in the gated phase diagram.
One identity builds field theories for anyon proliferation
A topological phase can be split along any anyon family, yielding Chern-Simons-Higgs theories including SU(2)_10→Spin(5)_1.
Torus Berry data fix the all-genus Abelian topological order
Normalized S and T matrices rebuild the anyon group and its quadratic form, even with 21.96% row noise.
· “Torus Berry Data Determine All-Genus Abelian Topological Orders”
Doping-independent Hall fall-off found inside the strange metal fan
Unlike the magnetic-order response, this Hall fall-off never changes with doping — a sign of quantum criticality.
· “Strange Metal Hall Effect in Underdoped BaFe₂(As_(1-x)P_x)₂”
Potts learning hits a tricritical point with exponent 4/15
There, the Edwards-Anderson correlator decays with the exact Potts spin exponent, fixing the universality class.
· “Learning Potts Models and Z₃ Toric Codes: Higher and Ordinary Nishimori Criticality”
Ising meson masses all collapse onto one universal curve
One scaling parameter fixes the lightest meson mass and the number of stable branches in lattices and a real magnet.
· “Universal meson spectra near (1+1)-dimensional Ising criticality”
Complex strip geometry predicts non-Hermitian quench dynamics
Biorthogonal quenches in the Yang–Lee chain follow boundary-strip formulas with no real-time fitting.
· “Biorthogonal Conformal Dynamics in Non-Hermitian Quantum Quenches”
Quantum learning peaks before chaos
One coupling angle sweeps from weak to scrambled; the learning sweet spot sits in between, and scales with size.
RL turns Trotter approximation errors into self-correction
An 8-spin policy controls 100-spin evolution from energy and variance alone, beating fixed-step and greedy Trotter.
· “Reinforcement Learning to Harness Approximation Errors for Long-Time Quantum Simulation”
One image metric finds all SU(3) Hubbard phase boundaries
Structural complexity of snapshots tracks entanglement and pins U/t = 3.50, 4.75, 5.65 with no Hamiltonian input.
Fermi-surface nesting loss kills CeTe3's charge order
Laser pulses show the charge-density wave fading while electron-phonon coupling strengthens.
Explicit monodromies fix Laughlin Hall conductance at 1/k
The monodromies form a bundle over the Jacobian whose slope recovers the fractional Hall conductance 1/k.
· “Moore--Read construction and explicit monodromies of Laughlin states on Riemann surfaces”
One formula gives the exact arithmetic Ising partition function
It yields exact free energy and entropy for the 2×2 lattice, where entropy rises at high temperature.
