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This work examines imaginarity as a resource in quantum information theory. The authors extend the resource theory of imaginarity to distributed scenarios, discuss the operational meaning and its role in channel discrimination.
Community detection has been studied for more than 20 years, but a perspective from community center is still missing and most algorithms need global information. The authors propose a linear algorithm based on local information to identify centers and related hierarchical structure for effective community detection, which can enhance clustering vector data as well.
Lorentz symmetry plays a fundamental role in classical to quantum electrodynamics, as well as in quantum chromodynamics, which is typically realized at sufficiently high energies and often exclusively in closed or isolated quantum systems. Here, the authors show that such a fundamental space–time symmetry can also be manifest as an emergent symmetry even in open Dirac systems, when they interact with the surrounding environment.
Photonic Ising machines exploit the parallelism and high propagation speed of light to solve combinatorial optimization tasks. The authors propose and demonstrate a photonic Ising machine with a fully reconfigurable optical vector-matrix transformation system and a modified algorithm based on simulated annealing, solving 20 and 30-spin Ising problems with high ground state probability.
Many excitable systems share a common feedback motif, but how such feedback acts on biomechanical systems remains largely unexplored. By extending the cellular vertex models to incorporate mechanochemical feedback and excitability, the authors explore how cellular mechanics and geometry regulate the propagation of active stresses in excitable media.
Solitons are nonlinear, stable and coherent solitary wave structures that have been investigated in a variety of systems from optics to plasma physics. The authors experimentally and theoretically investigate the dynamics of soliton arrays in a two-component Bose-Einstein condensate.
The advent of non-Hermitian optics carries new possibilities in manipulating optical response, offering alternative ways to enhance the quantum coherence of plasmonic resonances. Based on a theoretical model, the authors calculate a quantum yield enhanced by two orders of magnitude at room temperature, achieved by integration of a plasmonic antenna in a photonic cavity operated at a chiral exceptional point.
Since 1974, it was theoretically postulated that black holes, despite their name, emit radiation with a spectrum like that of a black body. Utilizing surface gravity water waves to emulate black hole physics, the authors reveal the emergence of a logarithmic phase singularity analogous to that predicted by Hawking in black holes, whose energy distribution associated with the singularity results in a Fermi-Dirac distribution instead of the familiar Bose-Einstein statistics of the Hawking radiation.
Epsilon-near-zero materials are promising to realize ultrafast all-optical devices, but their integration into photonic chips requires simultaneously wide broadband operativity, low-losses and Si-compatiblity. The authors propose a Si-compatible multilayer metamaterial capable of all-optical switching response times of few hundred femtoseconds.
Magnetic frustration of spins often leads to nontrivial spin textures and anomalous Hall responses, but typically below the magnetic transition temperature. The authors observe a giant unconventional anomalous Hall conductivity in the triangularlattice antiferromagnet PdCrO2 well above its Neel temperature, attributed to spin cluster skew scattering.
Steady-State Microbunching (SSMB) is emerging as a new concept for accelerator-based light sources to meet demands for high average power radiation at short wavelengths. The authors present findings from a proof-of-principle experiment that agree with theoretical expectations in multiple aspects, laying the foundation for the future realization of SSMB.
When a pulsed laser interacts with tissue, the molecules in the sample get excited to a higher energy state and relax either nonradiatively, leading to thermal damage, or via de-excitation processes, frequently associated with photodamage. Here, the authors explore how different photodamage mechanisms unfold across a spectrum of intense near-infrared femtosecond pulses.
Ac current-driven spin motions in helimagnetic metals can generate emergent electric fields acting on conduction electrons, leading to emergent electromagnetic induction (EEMI). In this study, we revealed that a short-period helimagnet Tb5Sb3 may have disordered spin helix structure and provides large EEMI.
Recently ideal spin filtering ability was demonstrated in the Dy-L-Tar metal-organic framework. In this work the authors show that this unusual effect emerges from the asymmetric display of alpha and beta spin states around the Fermi level, composed of the f states of the lanthanide.
Condensates with a shell can be formed by liquid-liquid phase separation and can burst like viscous bubbles by nucleation and growth of a hole in the shell surrounded by a rim. The authors develop a model to extract a broad range of rheological properties for spherical shells to understand the conditions for bursting.
Understanding the hybridization due to orbital overlap in solids allows justification for adjusting electron correlation and hopping integral under the Hubbard model. This work links spatial-overlap-driven to energetic-overlap-driven hybridization from perovskite oxides by resonant inelastic X-ray scattering at La N4,5 edges.
According to balance theory, social actors avoid establishing cycles with an odd number of negative links. This statement can be supported only after a comparison with a benchmark. The authors find that the level of balance depends on the null-model employed: homogeneous ones favor the weak balance theory; heterogeneous ones favor the strong balance theory.
The binomial method, and similar approximations, are often used for numerical simulations of population models in mathematical epidemiology and ecology. The authors study the binomial method to approximate a stochastic dynamic and compare it with an unbiased Gillespie method for stochastic simulation deriving insights on optimal discretization schemes for the binomial method and provide corresponding rules that would indicate if binomial or unbiased solution methods are more efficient.
In many chiral particle systems, vortex patterns emerge in the velocity fields due to the alignment interactions, but these patterns are non-permanent and decohere quickly. The authors predict the spontaneous emergence of vortices with high dynamical coherence, and identify the transition between the regimes of constant and oscillating vorticity.
Despite the numerous analogies between (non)Brownian suspensions and pedestrian crowds, rheological studies on the dynamics of the latter are scarce. Adopting such rheological perspective, the authors show that contact forces alone cannot lead to the faster-is-slower effect, but that social force interactions need to be included.
