Enhanced dissipation of crustal electric currents is shown to cause substantial internal heating. The magnetic energy and thermal luminosity of magnetized neutron stars would, through these mechanisms, increase dramatically, differing significantly from the observations of thermally emitting neutron stars. The activation of the dynamo can be hindered by establishing limitations on the permissible axion parameter space.

Naturally extending the Kerr-Schild double copy, all free symmetric gauge fields propagating on (A)dS in any dimension are demonstrated. The higher-spin multi-copy, much like the established lower-spin model, also involves zeroth, single, and double copies. The masslike term within the Fronsdal spin s field equations, constrained by gauge symmetry, and the mass of the zeroth copy are both remarkably fine-tuned to conform to the multicopy spectrum organized by higher-spin symmetry. GSH The Kerr solution's remarkable properties are further illuminated by this intriguing observation on the black hole's side.

The fractional quantum Hall state, characterized by a filling fraction of 2/3, is the hole-conjugate counterpart to the primary Laughlin state, exhibiting a filling fraction of 1/3. Transmission of edge states through quantum point contacts, fabricated within a GaAs/AlGaAs heterostructure possessing a sharply defined confining potential, is the subject of our investigation. The application of a small, but not infinitesimal bias, brings about an intermediate conductance plateau, with a conductance of G equaling 0.5(e^2/h). This plateau, uniformly detected in multiple QPCs, demonstrates exceptional resilience over a substantial variation in magnetic field, gate voltage, and source-drain bias, marking it as a robust feature. Employing a simple model that factors in scattering and equilibrium between opposing charged edge modes, we find the observed half-integer quantized plateau to be consistent with complete reflection of an inner counterpropagating -1/3 edge mode, with the outer integer mode passing completely through. For a quantum point contact (QPC) constructed on a distinct heterostructure characterized by a weaker confining potential, the observed conductance plateau lies at G=(1/3)(e^2/h). These outcomes provide backing for a 2/3 model, showcasing a transition at the edge from a structure having an inner upstream -1/3 charge mode and an outer downstream integer mode to one containing two downstream 1/3 charge modes, with the modification occurring as the confining potential changes from sharp to soft conditions while disorder maintains a significant influence.

Wireless power transfer (WPT), specifically the nonradiative type, has seen considerable advancement through the application of parity-time (PT) symmetry. This letter proposes a more advanced form of the second-order PT-symmetric Hamiltonian, recast as a high-order symmetric tridiagonal pseudo-Hermitian Hamiltonian. This advanced formulation resolves limitations on multisource/multiload systems stemming from the application of non-Hermitian physics. We propose a three-mode, pseudo-Hermitian, dual-transmitter, single-receiver circuit, demonstrating robust efficiency and stable frequency wireless power transfer, even without PT symmetry. Subsequently, when the coupling coefficient between the intermediate transmitter and receiver is changed, active tuning is not required. Classical circuit systems, subjected to the analytical framework of pseudo-Hermitian theory, unlock a broader scope for deploying coupled multicoil systems.

A cryogenic millimeter-wave receiver is employed in our pursuit of dark photon dark matter (DPDM). The interaction between DPDM and electromagnetic fields, a kinetic coupling with a defined constant, culminates in DPDM's conversion into ordinary photons at the surface of a metal plate. Our investigation focuses on the frequency band 18-265 GHz, in order to identify signals of this conversion, this band corresponding to a mass range from 74 to 110 eV/c^2. No significant excess signal was noted in our study, leading to an upper bound of less than (03-20)x10^-10 at a 95% confidence level. This constraint stands as the most stringent to date, exceeding the limits imposed by cosmological considerations. Improvements from earlier studies arise from the incorporation of a cryogenic optical path and a fast spectrometer.

We utilize chiral effective field theory interactions to determine the equation of state of asymmetric nuclear matter at finite temperatures, achieving next-to-next-to-next-to-leading order accuracy. The many-body calculation, coupled with the chiral expansion, has its theoretical uncertainties evaluated by our findings. By employing a Gaussian process emulator for free energy, we extract the thermodynamic properties of matter via consistent differentiation and use the Gaussian process to explore a wide range of proton fractions and temperatures. Universal Immunization Program This first nonparametric calculation of the equation of state in beta equilibrium encompasses the speed of sound and symmetry energy at a finite temperature. Our results further highlight a decline in the thermal portion of pressure with the escalation of densities.

Within Dirac fermion systems, a Landau level exists uniquely at the Fermi level, known as the zero mode. Observing this zero mode will offer substantial corroboration of the presence of Dirac dispersions. Semimetallic black phosphorus' response to pressure was investigated through ^31P-nuclear magnetic resonance measurements conducted across a wide range of magnetic fields, up to 240 Tesla, revealing a remarkable field-induced increase in the nuclear spin-lattice relaxation rate (1/T1T). Our investigation further revealed that the 1/T 1T value at a fixed magnetic field remains temperature-independent at low temperatures, but it markedly increases with temperature when above 100 Kelvin. Through examining the effects of Landau quantization on three-dimensional Dirac fermions, all these phenomena become readily understandable. This research demonstrates that the quantity 1/T1 excels in the exploration of the zero-mode Landau level and the identification of the Dirac fermion system's dimensionality.

Investigating the complexities of dark state dynamics proves difficult because these states are incapable of absorbing or emitting single photons. Negative effect on immune response This challenge's complexity is exacerbated for dark autoionizing states, whose lifetimes are exceptionally brief, lasting only a few femtoseconds. High-order harmonic spectroscopy, a novel method, has recently been introduced to scrutinize the ultrafast dynamics of single atomic or molecular states. The emergence of an unprecedented ultrafast resonance state is observed, due to the coupling between a Rydberg state and a dark autoionizing state, which is modified by the presence of a laser photon. Resonance-enhanced high-order harmonic generation produces extreme ultraviolet light emission more than an order of magnitude stronger than the emission obtained without resonance. The dynamics of a single dark autoionizing state and the temporary modifications to the dynamics of real states, as a consequence of their overlap with virtual laser-dressed states, can be investigated by leveraging induced resonance. Subsequently, the outcomes presented enable the generation of coherent ultrafast extreme ultraviolet light, thus furthering ultrafast science applications.

The phase transitions of silicon (Si) are extensive under ambient temperature isothermal compression and shock compression. In situ diffraction measurements of ramp-compressed silicon, spanning pressures from 40 to 389 GPa, are detailed in this report. X-ray scattering, differentiated by angular dispersion, shows silicon adopts a hexagonal close-packed structure at pressures between 40 and 93 gigapascals, changing to a face-centered cubic arrangement at greater pressures and sustaining this structure up to, at the very least, 389 gigapascals, the highest pressure investigated to determine silicon's crystal lattice. Contrary to theoretical expectations, hcp stability extends to encompass a wider spectrum of high pressures and temperatures.

The large rank (m) limit is employed to study coupled unitary Virasoro minimal models. Using large m perturbation theory, we identify two nontrivial infrared fixed points with irrational coefficients within the anomalous dimensions and the central charge. For N greater than 4 copies, the infrared theory is shown to invalidate all current candidates capable of boosting the Virasoro algebra, up to spin 10. The evidence firmly supports the assertion that the IR fixed points are compact, unitary, irrational conformal field theories, and they contain the fewest chiral symmetries. We also study the anomalous dimension matrices for a family of degenerate operators featuring ascending spin values. A clearer picture of the form of the paramount quantum Regge trajectory begins to emerge, displayed by this further evidence of irrationality.

In the realm of precision measurements, interferometers play a crucial role, enabling the accurate detection of gravitational waves, laser ranging, radar signals, and high-resolution imaging. Quantum-enhanced phase sensitivity, the critical parameter, allows for surpassing the standard quantum limit (SQL) using quantum states. Quantum states, however, are remarkably susceptible to damage, undergoing rapid deterioration owing to energy losses. We devise and demonstrate a quantum interferometer, employing a beam splitter with a variable splitting ratio to protect the quantum resource from environmental interference. The quantum Cramer-Rao bound of the system serves as a benchmark for optimal phase sensitivity. The quantum interferometer significantly diminishes the need for quantum sources in the execution of quantum measurements. According to theoretical calculations, a 666% loss rate has the potential to exploit the SQL's sensitivity with a 60 dB squeezed quantum resource compatible with the existing interferometer, thereby eliminating the necessity of a 24 dB squeezed quantum resource and a conventional Mach-Zehnder interferometer injected with squeezing and vacuum. In experiments, a 20 dB squeezed vacuum state produced a 16 dB sensitivity boost through optimization of the first splitting ratio across a spectrum of loss rates, from 0% to 90%. This illustrates the remarkable preservation of the quantum resource under practical application conditions.