Category: 4. Physics

Friedel oscillations and chiral superconductivity in monolayer NbSe2

We consider the low-energy Hamiltonian for the metallic bands of monolayer NbSe₂

$$\hat{H}={\sum} _{{{\bf{k}}},\sigma }{\xi }_{{{\bf{k}}},\sigma }{\hat{c}}_{{{\bf{k}}},\sigma }^{{\dagger} }{\hat{c}}_{{{\bf{k}}},\sigma }+\hat{V},$$

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September 5, 2025
$Unbroken $${{{\mathscr{P}}}}{{{\mathscr{T}}}}$$ -symmetry in the absence of gain or loss$

Unbroken $${{{\mathscr{P}}}}{{{\mathscr{T}}}}$$ -symmetry in the absence of gain or loss

Nonorthogonal coupled-mode theory

The propagation of coherent light in arrays of $N$ coupled waveguides is governed by the paraxial Helmholtz equation (see “Methods”, Eq. (3)) or, by applying the tight-binding ansatz (5) in terms of the…

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September 5, 2025
Pressure induced superconductivity in hybrid Ruddlesden‒Popper La5Ni3O11 single crystals
Bednorz, J. G. & Müller, K. A. Possible high T_c superconductivity in the Ba–La–Cu–O system. Z. Phys. B: Condens. Matter 64, 189–193 (1986).

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Norman, M. R. Materials design for…

Towards Floquet Chern insulators of light

Thompson, R. J., Rempe, G. & Kimble, H. J. Observation of normal-mode splitting for an atom in an optical cavity. Phys. Rev. Lett. 68, 1132–1135 (1992).

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Demonstration of Super-X divertor exhaust control for transient heat load management in compact fusion reactors

DIFFER–Dutch Institute for Fundamental Energy Research, Eindhoven, the Netherlands

B. Kool, G. L. Derks, T. A. Wijkamp, J. T. W. Koenders & M. van Berkel

Eindhoven University of Technology, Eindhoven, the Netherlands

B. Kool, K….

Transient domain boundary drives ultrafast magnetisation reversal

Time-resolved magnetic soft-X-ray spectroscopy

We investigate a typical nanometre-scale heterostructure consisting of an amorphous ferrimagnetic Gd₂₅Co₇₅ alloy with in-plane magnetic anisotropy, which exhibits deterministic picosecond AO-HIS…

Physics – Quantum Computing Meets Finance

In many sciences, you have data sampled at different time frequencies. In economics, the example that’s often quoted is “nowcasting.” Say it’s mid-August, and you want to predict the GDP at the end of 3rd and 4th quarters. But how do you…