GEWU Magazine

Quantum states and their teleportation4 questions

Which graphs are suitable for quantum teleportation: graph-structural characterization of teleportation resources in quantum-walk protocols
Open for about 9 years
Teleportation-based quantum state tomography: the continuous-variable extension and minimal resources for structured states
Open for less than 1 year
A coincidence-time-loophole-free criterion for certifying quantum teleportation: the Clauser-Horne analogue beyond averaged fidelity
Open for about 5 years
Minimal classical communication cost for non-classical quantum teleportation fidelity
Open for about 14 years

Some unresolved issues in quantum phase transitions and quantum entanglement5 questions

Quantum chip3 questions

Quantum channel4 questions

Fundamental issues in manipulating quantum states in solid systems inspired by quantum information5 questions

Fundamental problems of quantum state manipulation inspired by quantum information6 questions

Mathematical problems in quantum information6 questions

Quantum internet4 questions

Key issues in direct secure quantum communication7 questions

Quantum mass standard4 questions

Column transfer matrices2 questions

Critical Ising magnetic field perturbation and

E_8

mass spectrum1 questions

Integrability breaking of the $E_8$ spectrum in the transverse-field Ising chain: heavy-particle lifetimes, lineshapes, and robustness of high-energy $E_8$ peaks in BaCo $_2$ V $_2$ O $_8$
Open for about 5 years

Critical Ising conformal field theory (

c=1/2

)2 questions

Exact solution of zero-field 2D Ising model3 questions

The evolutionary dynamics mysteries of influenza virus5 questions

Six-vertex—XXZ spin chain correspondence2 questions

Critical singularity of six-vertex model4 questions

Six-vertex model1 questions

Classification of boundary fluctuation universality classes for the six-vertex model with domain-wall boundary conditions near the critical anisotropy $\Delta=1$ and in degenerate zero-weight limits
Open for about 2 years

Six-vertex transfer matrix2 questions

Six-vertex free energy3 questions

Spiral wave dynamics and fibrillation control10 questions

Mechanism of colossal magnetoresistance in manganites5 questions

Close-packed dimer model3 questions

Experimental confirmation of significantly enhanced radiative heat transfer at nanoscale9 questions

Nanostructured silicon thermoelectric materials5 questions

Can stochastic resonance improve the signal-to-noise ratio of weak signal detection?8 questions

Is it possible to achieve far-field imaging beyond the diffraction limit?1 questions

Scalable multimode continuous-variable entanglement transduction through plasmonic nanostructures toward multichannel quantum networks
Open for about 10 years

Can exciton Bose-Einstein condensation be achieved?3 questions

Can a dilute magnetic semiconductor with intrinsic room-temperature ferromagnetism be fabricated?6 questions

Young Supernova Remnants and Titanium 447 questions

Wave-particle duality of quasiparticle in condensed matter4 questions

Newton's Law of Inverse Squares and Its Experimental Test2 questions

Even arrow constraint3 questions

Coupled Ising models1 questions

Robustness and transferability of fragmentation-driven Ashkin-Teller criticality in fluctuation coupled Ising models

Does analytic continuation in the coupling constant apply to resonant states in deformed nuclei?5 questions

The partition function as a trace:

Z=\operatorname{Tr}T^M

3 questions

Which graphs are suitable for quantum teleportation: graph-structural characterization of teleportation resources in quantum-walk protocols

Teleportation-based quantum state tomography: the continuous-variable extension and minimal resources for structured states

A coincidence-time-loophole-free criterion for certifying quantum teleportation: the Clauser-Horne analogue beyond averaged fidelity

Minimal classical communication cost for non-classical quantum teleportation fidelity

Local relaxation, persistent memory, and the entanglement barrier after interacting quantum quenches

Correlated fractional-quantum-Hall-like phases in artificial-gauge-field optical lattices: formation, preparation, and detection in the many-body regime

Kibble–Zurek scaling for slow quenches across an extended gapless region between two quantum phase transitions

Pair superfluidity in pair-hopping Bose-Hubbard models: two-particle correlator asymptotics, insulator-to-pair-condensate criticality, and phase boundaries beyond mean field

Scalable, noise-robust generation and certification of multipartite entanglement in optical lattices using only local interactions and lattice driving

Processor-scale photonic links for superconducting-qubit control and readout: optical dissipation, cryogenic multiplexing, link noise, and background thermal occupancy

On-demand entangling exchange in every unit cell of foundry-fabricated SiMOS spin-qubit arrays and coherent operation beyond one dimension

On-chip cryogenic multiplexed readout of Si/SiGe quantum-dot arrays: switch speed, magnetic-field robustness, fabrication yield, and validated readout fidelity at scale

Classical capacity and Gaussian-encoding optimality of the lossy bosonic channel with non-Markovian memory

Whether the coherent channel-discrimination bias pscoh(N0,N1)−12p_s^{\rm coh}(\mathcal{N}^0,\mathcal{N}^1)-\tfrac{1}{2}pscoh​(N0,N1)−21​ is a metric on the space of quantum channels

Choi capacities of quantum channels: entanglement-generation equality, single-letter collapse, and higher-order hierarchy gaps

Covert quantum capacity of the lossy thermal-noise bosonic channel: closing the achievability–converse gap

Scalability and time–coupling trade-offs of quantum-Zeno-assisted shortcut-to-adiabaticity state transfer in strongly coupled spin chains

Simultaneous high-fidelity universal control, initialization, and readout in semiconductor quantum-dot spin-qubit arrays beyond a few qubits

Scalable suppression of control-line radiative decay in superconducting-qubit architectures while transmitting strong control pulses for fast high-fidelity gates

Control, readout, and realistic-decoherence certification for the protected current-mirror superconducting qubit

Programmable coherent Floquet control of Hubbard excitons: achieving azimuthal SU(2) and multi-pulse control beyond uniaxial pi/2 rotations of the Sr2CuO3 Hubbard exciton

Capability and limits of measurement-based quantum feedback beyond eigenstate preparation: general objectives, adaptive channels, and non-Markovian dynamics

Globally optimal measurement-based feedback beyond a single qubit: multi-qubit purification and Bell-state generation under finite measurement efficiency

Chaos-assisted full quantum state controllability by weak perturbations in many-body systems with embedded random-matrix statistics

Optimal information–disturbance trade-off for unknown quantum operations beyond the Haar-covariant unitary case

Optimal weak-measurement feedback control beyond the single-qubit dephasing model: general noise channels and multi-qubit state stabilization

Quantitative accuracy limits on quantum measurement and state preparation under a Hamiltonian bounded from below

The general quantum simultaneous smoothing conjecture: a single state realizing all smooth one-shot marginal divergences of a multipartite quantum state

Unconstrained non-von-Neumann-type entropy inequalities: is the quantum entropy cone strictly smaller than the von Neumann cone?

Exhibiting a non-sofic or non-hyperlinear group: the soficity problem sharpened by MIP* = RE

Von Neumann entropy inequalities beyond strong subadditivity: the quantum entropy cone and balanced inequalities for Gaussian states

Sharp Pinsker-type trace-norm bounds on conditional mutual information from Petz reconstruction and the self-commutator (Zhang–Kim conjectures on approximate strong subadditivity)

Necessary and sufficient saturation conditions and constructive optimal POVMs for the multiparameter quantum Cramér–Rao bound at the single-copy level for general rank-deficient states

Optimal LOCC strategies and entanglement thresholds for entanglement percolation in random (heterogeneous) quantum networks

General placement of quantum switches and optimal resource allocation in arbitrary entanglement-based network topologies

Operational-regime delineation for sequential entanglement generation with error detection (SEG-ED) quantum repeaters

Entanglement routing with GHZ-measurement (n-fusion) swapping under heterogeneous, resource-constrained, and decentralized quantum networks: algorithms, guarantees, and the fate of distance-independent rates

Formal security proofs, detection-threshold analyses, and overhead-minimal countermeasures for semiquantum secure direct communication under active adversaries

Composable finite-key security and optimal active attacks for ultrabroadband two-way quantum-secured communication (FL-QKD/QSDC)

Real-life secrecy capacity of quantum secure direct communication in the Wyner wiretap framework: finite block lengths, imperfect devices, and capacity-approaching forward codes

Device-independent security proof of quantum secure direct communication against general coherent attacks

Finite-size secrecy-capacity analysis for the generic security framework of quantum secure direct communication

Low-complexity phase-basis measurement for high-dimensional time/phase quantum secure direct communication

Rigorous security characterization and secure-rate bounds for quantum secure direct communication using continuum coherent states (Guerra–Rios–Ramos protocols)

Mutual consistency of independent kilogram realizations and the end of consensus-value dissemination (CCM Phase 3 transition)

Exactness of the Josephson and quantum Hall relations and convergence of independent kilogram realizations in the revised SI

Quantifying the equivalence-principle test implied by the agreement between atom-counting and Kibble-balance realizations of the kilogram

Suppressing alignment-dominated type-B uncertainties to reach a 10−810^{-8}10−8-level realization of the kilogram with the KRISS Kibble balance

Finite-size structural relation between corner-transfer-matrix-derived and finite-system DMRG-optimized matrix product states

Row–column transfer-matrix inversion relations and inhomogeneous generalizations for vertex models of canonical Grothendieck polynomials and their duals

Integrability breaking of the E8E_8E8​ spectrum in the transverse-field Ising chain: heavy-particle lifetimes, lineshapes, and robustness of high-energy E8E_8E8​ peaks in BaCo2_22​V2_22​O8_88​

Rigorous bosonization of the critical Ising model beyond planar domains: higher-genus Riemann surfaces and the off-critical regime

Universality class of the c=12⊗c=0c=\frac{1}{2}\otimes c=0c=21​⊗c=0 coupling: the Ising model on an uncorrelated critical site-percolation lattice at p=pcp=p_cp=pc​

Complete geometric parametrization of the Fisher zeros of the planar Ising model (the complexification conjecture for the Livine–Bonzom–Lis immersion formula)

Rigorous status of the claimed exact solution of the two-dimensional Ising model with next-nearest-neighbor interactions at zero field

Critical behavior near TcT_cTc​ of the boundary-row spin-spin correlation function of the finite-size two-dimensional Ising model with periodic-free boundary conditions

Population-Level Contribution of Receptor-Binding-Avidity Selection to Human Influenza A Virus Antigenic Drift: Quantification, Mechanism, and Epidemiological Consequences

Mechanism of serum-antibody escape by conserved influenza H3N2 hemagglutinin trimer-interface mutations and the biophysical basis of phenotype-specific epistasis in HA evolution

Robustness of canalization in human influenza A(H3N2) antigenic evolution: original antigenic sin, joint HA-NA antigenicity, and deep bifurcations

Mechanistic determinants of the global source–sink circulation of seasonal influenza A(H3N2) and the surveillance design required to extend the vaccine-strain prediction horizon

Mechanistic link between immune epidemiology and clonal interference in seasonal influenza A/H3N2 evolution

Parity-induced logarithmic term in the min-entropy of the critical XXZ chain: prove or refute that the prefactor equals α=πR2=1/(4K)\alpha=\pi R^{2}=1/(4K)α=πR2=1/(4K) throughout −1<Δ≤1-1<\Delta\leq 1−1<Δ≤1

Modified operators and off-shell relations beyond the rational six-vertex model: the trigonometric anti-periodic, reflection-algebra, and higher-rank extensions of the linear-system method

Off-critical deformation and full discrete holomorphicity of the quantum-group conserved currents in the six-vertex and trigonometric solid-on-solid models

Exact two-point correlation functions of the six-vertex height field with domain-wall boundary conditions at generic anisotropy, and the antiferroelectric mesoscopic crossover

Generic singularities of six-vertex limit shapes and the fluctuation processes at them

Undetermined multiplicative constants in the large-NNN asymptotics of the six-vertex model with domain wall boundary conditions

Classification of boundary fluctuation universality classes for the six-vertex model with domain-wall boundary conditions near the critical anisotropy Δ=1\Delta=1Δ=1 and in degenerate zero-weight limits

Scaling limit of the Zr\mathcal{Z}_rZr​-invariant inhomogeneous six-vertex model for r≥3r\ge3r≥3 and for non-periodic inhomogeneities: identification of the continuum conformal field theories

Singular parameter regimes and localisation hypotheses in the asymmetric six-vertex model construction of quantum cohomology of Grassmannians

Boundary-condition dependence of the six-vertex bulk free energy: extending the density-only (n-equivalence) classification beyond periodic matched patterns

Boundary-condition dependence of the ice-point six-vertex entropy: classification of boundary conditions, merged-boundary entropies, and the Néel partition function

Thermodynamic limit of the six-vertex model with a reflecting end beyond the disordered regime: ferroelectric and antiferroelectric free energies and phase separation

Generalization of stochastic birth-death termination of spiral-wave dynamics in cardiac tissue to patient-specific 3D atrial geometry, remodeling substrate, and persistent atrial fibrillation

Extending the particle model of spiral defect chaos to boundary annihilation, angle-resolved encounters, and the ionic dependence of tip attraction

Defibrillation by teleportation beyond two-dimensional simulation: experimental realization of the designed single-stimulus protocol and the three-dimensional scroll-wave generalization

Quantitative dynamics of phase defect lines and surfaces in excitable media: motion, stability, interaction laws, and surface analogues of filament tension

Elimination of scroll waves in three-dimensional cardiac-tissue models by control currents confined to a two-dimensional surface

Universality of the spectral exponents and the possibility of a Kolmogorov-like scaling theory for spiral- and scroll-wave turbulence in cardiac excitable media

Open problems in adjoint-optimized ultra-low-energy defibrillation: singularity-targeting costs, waveform realizability, optimization stability, and synthesis without full state knowledge

Whether the coherent channel-discrimination bias $p_s^{\rm coh}(\mathcal{N}^0,\mathcal{N}^1)-\tfrac{1}{2}$ is a metric on the space of quantum channels

Suppressing alignment-dominated type-B uncertainties to reach a $10^{-8}$ -level realization of the kilogram with the KRISS Kibble balance

Integrability breaking of the $E_8$ spectrum in the transverse-field Ising chain: heavy-particle lifetimes, lineshapes, and robustness of high-energy $E_8$ peaks in BaCo $_2$ V $_2$ O $_8$

Universality class of the $c=\frac{1}{2}\otimes c=0$ coupling: the Ising model on an uncorrelated critical site-percolation lattice at $p=p_c$

Critical behavior near $T_c$ of the boundary-row spin-spin correlation function of the finite-size two-dimensional Ising model with periodic-free boundary conditions

Parity-induced logarithmic term in the min-entropy of the critical XXZ chain: prove or refute that the prefactor equals $\alpha=\pi R^{2}=1/(4K)$ throughout $-1<\Delta\leq 1$

Undetermined multiplicative constants in the large- $N$ asymptotics of the six-vertex model with domain wall boundary conditions

Classification of boundary fluctuation universality classes for the six-vertex model with domain-wall boundary conditions near the critical anisotropy $\Delta=1$ and in degenerate zero-weight limits

Scaling limit of the $\mathcal{Z}_r$ -invariant inhomogeneous six-vertex model for $r\ge3$ and for non-periodic inhomogeneities: identification of the continuum conformal field theories

Infrared fate of the noncompact CP $^1$ gauge theory: is the Coulomb-to-crystal transition of the three-dimensional classical dimer model continuous or weakly first order?

Central charge of the square-lattice dimer model: reconciling the $c=1$ height-field and $c=-2$ symplectic-fermion conformal descriptions

Microscopic origin of room-temperature ferromagnetism in vanadium-doped monolayer WSe $_2$

Quantitative validation of the F-centre/bound-magnetic-polaron mechanism for room-temperature ferromagnetism in Mn/Mg co-doped In $_2$ O $_3$

Microscopic mechanism of room-temperature ferromagnetism in Ga $_{1-x}$ Cu $_x$ N nanowires: exchange pathway, role of carriers and defects, and mixed-valence effects

Why so few $^{44}$ Ti detections? Quantifying nucleosynthesis-pathway effects versus exceptional explosions in core-collapse supernovae

Mass and three-dimensional distribution of $^{44}$ Ti in young supernova remnants: reconciling Sc K-alpha X-ray escape with gamma-ray line kinematics

The interior Fe/Ti ratio, three-dimensional structure, and kick-recoil connection of the $^{44}$ Ti-bearing ejecta in Cassiopeia A

Unshocked interior iron or decoupled Fe/ $^{44}$ Ti production: the origin of the spatial decorrelation between radioactive $^{44}$ Ti and iron X-ray emission in Cassiopeia A

Self-consistent three-dimensional modeling of the Cassiopeia A supernova: explosion energy, $^{44}$ Ti production and distribution, jet origin, and the connection to the remnant

Microscopic origin of the two-component internal structure of a single doped hole in two-leg Hubbard and $t$ - $J$ ladders

Quantitative interacting-triplon theory of quasiparticle decay and binding in the frustrated spin-ladder magnet BiCu $_2$ PO $_6$