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20022026
most citedObservation of an anomalous positron abundance in the cosmic radiation

2.2k citations

2,233 papers

quant-ph2026

Influence of fast and slow laser phase noise on the fidelity of the Mølmer-Sørensen trapped-ion gate

Nikita Semenin, Ksenia Khabarova, Nikolay Kolachevsky

High-fidelity two-qubit entangling gates are essential for the realization of useful quantum algorithms on quantum processors. The Mølmer-Sørensen (MS) gate has become a common cho…

astro-ph.HE2026

Possible Sources of Iron Nuclei in Ultra-High-Energy Cosmic Rays

Anna Uryson

The origin of a cosmic ray particle with an ultra-high energy of 2.44 x 10^20 eV recorded by the Telescope Array is discussed by assuming that it is a heavy nucleus, namely an iron…

astro-ph.HE2026

A broadband outburst of the compact steep-spectrum quasar 3C 138 in 2024-2026

T. V. Mufakharov, Yu. V. Sotnikova, V. V. Vlasyuk +20

After several decades of relative quiescence, the compact steep-spectrum quasar 3C 138 entered an active phase in 2024-2026, exhibiting strong broadband flaring. We investigate its…

cond-mat.supr-con2026

Optical Properties of Iron-Selenide NaKRbFeSe Single Crystals

Andrei Muratov, Yevgeny Rakhmanov, Andrei Shilov +2

With infrared Fourier-transform spectroscopy and spectroscopic ellipsometry we investigated the in-plane reflectance of the superconducting NaKRbFe$_{1.7…

astro-ph.HE2026

Synchrotron radiation in nonuniform magnetic field

V. S. Beskin, A. Yu. Istomin, F. A. Kniazev +1

The distortion of the spectrum of synchrotron radiation received by a distant observer due to magnetic field inhomogeneity is discussed. It is shown that for single-particle radiat…

cond-mat.supr-con2026

Landau-Zener tunneling and quantum interference of Andreev states

Mikhail S. Kalenkov, Andrei D. Zaikin

With the aid of a microscopic theory we derive an effective Hamiltonian that controls quantum dynamics of Andreev states in superconducting nanojunctions out of equilibrium. Resolv…