Annalen der Physik

ABSTRACT We study the corrections to the vacuum energy density and the corresponding force between the plates in a Casimir apparatus in the framework of the ModMax model. We linearize the theory around a background magnetic field fixed along an arbitrary direction with respect to the z axis, taken perpendicular to the plates of the Casimir cavity. We find the mode dispersion relations of the conf…

ABSTRACT We propose a scheme to realize magnon blockade in a hybrid system composed of a transmon‐type superconducting qubit directly coupled to the magnon mode of a single‐crystalline yttrium‐iron‐garnet sphere. By applying two‐tone driving to the qubit, we engineer an effective Hamiltonian for the magnon mode including both single‐magnon and two‐magnon interaction. Due to the destructive interf…

ABSTRACT Entropic uncertainty relations are universal quantifiers of fundamental uncertainties of quantum measurements and are widely discussed in the quantum metrology literature. Quantum memory is a phenomenon related to the specific type of quantum correlations that allows for reducing fundamental uncertainties of quantum measurements. In the present work, the modified concept of quantum memor…

ABSTRACT We study the steady‐state quantum Fisher information (QFI) and several quantum resources entanglement, quantum coherence, and quantum discord for a pair of coupled qubits interacting with either bosonic or fermionic reservoirs. Using the Bloch–Redfield master equation beyond the secular approximation, we derive analytical expressions for the steady‐state density matrix and analyze how eq…

ABSTRACT High‐dimensional quantum systems offer a promising pathway to exceed information capacity limits, yet realizing robust dense coding remains challenged by decoherence. While Floquet engineering allows dynamic control, its potential in high‐spin systems is not fully exploited. Here, presenting a novel integration of periodic driving with higher‐dimensional thermal spin models, we investiga…

ABSTRACT One‐dimensional (1D) vortex arrays (VAs) carrying multiple phase singularities arranged linearly have significant promise for applications in flexible multiparticle manipulation, assembly micro‐processing, and optical communications. The broadening of their lasing range and wavelengths significantly enhances their versatility for practical applications. However, 1D‐VAs generated in solid…

ABSTRACT The entanglement swapping protocol (ESP) is a fundamental primitive for distributing quantum correlations across distant nodes in a quantum network. Recent studies have demonstrated that even when the involved qubit pairs are only partially entangled, it is still possible to concentrate and transmit entanglement via Bell‐basis measurements. In this work, we extend these ideas to quantum …

ABSTRACT This manuscript delineates a rigorous theoretical framework and mathematical derivation for a Quantum Battery (QB) constituted by an atomic ensemble interacting with a nonlinear radiation field. We extend the paradigmatic Dicke model by incorporating a Kerr‐type nonlinearity through an algebraic ‐deformation of the Heisenberg–Weyl algebra. By resolving the time‐dependent Schrödinger equa…

ABSTRACT Superconductivity in sulfur superhydride H 3 S under extreme pressures has been explained theoretically, but it requires a peaked concentration of the electronic density of states (DOS), which has been found in first‐principles calculations. The mechanism of this peak formation, though vital for its high transition temperature, has however remained obscure. We address this problem throug…

ABSTRACT Entanglement is a fundamental resource in quantum information science. In this work, we introduce the geometric total concurrence (GTC), a new measure of genuine multipartite entanglement (GME) for ‐partite systems based on the concept of total concurrence. The GTC satisfies a key criterion by assigning higher entanglement to GHZ states than to W states. We derive analytically computable…

ABSTRACT The probability continuity equation is solved within the Madelung–Bohm framework, assuming a separable phase expressed as . Using operator methods, the amplitude of the wave function is reformulated in a form that is more practical for application to any given initial condition. This results in the function , which characterizes the amplitude of the wave function, with being the transfor…

ABSTRACT Fiber end‐face metasurfaces represent an emerging frontier in integrated photonics, combining the advanced light‐field manipulation capabilities of metasurfaces with the robust transmission properties of optical fibers, and enabling compact, high‐performance photonic devices. These devices trace the route to beam shaping, polarization control, vortex generation, and high‐sensitivity sens…

ABSTRACT Chromium‐doped yttrium aluminum garnet (Cr 4+ : YAG) transparent ceramics (TCs) have significant applications in 1 µm passively Q‐switched (PQS) lasers. The issues of low conversion rate of Cr 4+ ions and the impact of different Cr doping concentrations on the PQS lasers are key problems that need to be resolved. In this paper, the energy band structures and optical absorption spectra of…

ABSTRACT Metagratings have emerged as a powerful platform for efficient electromagnetic wave control. Fundamentally, a trade‐off exists between architectural complexity and functional diversity: a single meta‐atom per period can only suppress one diffraction order, typically enabling anomalous reflection and dual‐beam splitting in the case of two and three propagating orders, respectively. Achiev…

ABSTRACT We explore quantum and thermodynamic features of Carrollian Reissner‐Nordström black holes, emphasizing Lorentz‐violating geometry, generalized uncertainty principle corrections, and electromagnetic charge interactions. Using the tunneling formalism for Dirac particles, we derive the Hawking temperature and extend it to include quantum gravity modifications induced by a minimal length sc…

ABSTRACT A mass sensing scheme is theoretically proposed based on a hybrid phonon‐qubit‐photon‐magnon system. The system is composed of a nanomechanical resonator, a flux qubit, a coplanar waveguide cavity, and a yttrium iron garnet sphere, where the qubit is driven by a strong pumping field and a weak probe field. By employing the all‐optical detection technique, the resonant frequency shift ind…

ABSTRACT The electronic structure and thermoelectric response of the half‐Heusler compound TaRuAs are studied based on density functional theory, deformation potential theory, and Boltzmann transport theory. The effects of doping are elucidated adopting both the rigid band approximation and supercells that explicitly include the dopant atoms. Our results reveal that TaRuAs has a bandgap of 0.3 eV…

ABSTRACT We propose and test a new approach for computing the superconducting properties of materials, which incorporates momentum anisotropy at a minimal computational cost. This method is designed to be integrated into high‐throughput workflows, where materials are systematically investigated by computing their electron–phonon coupling using standard density functional theory. Our approach invo…

ABSTRACT High pulse energy, high average power lasers with low spatial modulation have attracted many advanced applications in scientific research, and beam combination through stimulated Brillouin amplification (SBA) offers the potential for energy scaling with repetitive operation. However, attaining low‐modulation beam combining output remains a significant challenge due to the near‐field inte…

ABSTRACT This study proposes a new lightweight quantum key distribution (LQKD) protocol based on the four‐particle cluster state within a quantum‐restricted environment. The protocol enables a quantum‐capable user to simultaneously establish two separate secret keys with two “classical” users, who are limited to performing only the Hadamard operation and measurements in the basis. By adopting a o…