Initial equations
Now, we investigate a DT type atomic system (Fig. 1b) involving three metastable ground states \(|0\rangle\), \(|1\rangle\) and \(|2\rangle\), as well as excited states \(|e_{1}\rangle\) and \(|e_{2}\rangle\). Six laser fields…
Category: 4. Physics
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Physics – Reconstructing a Five-Star Smashup
• Physics 18, 134
A detailed analysis of a stellar cluster has led to a possible explanation for several fast-moving runaway stars around the cluster.
NASA; ESA; P. Crowther/University of Sheffield
Stellar nursery. The star… Continue Reading
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Measurement of phonon angular momentum
Einstein, A. & de Haas, W. J. Experimental proof of the existence of Ampère’s molecular currents. KNAW Proc. 18, 696–711 (1915).
Scott, G. G. Review of gyromagnetic ratio experiments. Rev….
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Photoresponsive dual-mode memory transistor for optoelectronic computing: charge storage and synaptic signal processing
Flexible dual-mode synaptic device based on a bilayer dielectric structure
Figure 1a shows the structure of the proposed dual-mode device fabricated on a flexible business card substrate, which provides both memory and synaptic functions within a…
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Optomechanical frequency comb induced by thermal and optical forces in NEMS-based cavity optomechanics
An overview illustrating the OMFC system is shown in Fig. 1a. As depicted, the tip of the tapered optical fiber is attached to the outer photonic crystal nanobeam (PCN). The NNR consists of two cascaded spring-mass systems: a primary linear…
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Enhancing ferroelectric stability: wide-range of adaptive control in epitaxial HfO2/ZrO2 superlattices
Epitaxial growth and structural characterizations of superlattices
(HfO2)n/(ZrO2)n (n = 2, 3, 6, 11, and 16 unit cells) superlattices were epitaxially grown on (001)-oriented La0.67Sr0.33MnO3 (LSMO)-buffered SrTiO3 (STO) substrates at 600 °C…
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Intertwined orders in a quantum material
Hossain, M. S. et al. Nat. Phys. https://doi.org/10.1038/s41567-025-02917-6 (2025).
Keldysh, L. & Kopaev, Y. Sov. Phys. Sol. State 6, 2219–2224 (1964).
Windgätter, L. et al. npj Quantum…
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Precise detection of tiny birefringence with accuracy reaching 10−11 level
Derivation of the theoretical model
We introduce an effective two-level system with the pseudo spin up and spin down being two orthogonal spin-orbit photonic states \(\hat{R}\) and \(\hat{L}\), respectively. Such spin-orbit states are defined in…
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Contrasting c-axis and in-plane uniaxial stress effects on superconductivity and stripe order in La1.885Ba0.115CuO4
Principles of the μSR technique
In a μSR experiment (see the Supplementary Note 1 and the Supplementary Fig. S1), a high-intensity beam of 100% spin-polarized positive muons is directed into the sample, where the muons thermalize at…
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Exploration and optimization of different charge transport layers for Cs4CuSb2Cl12 based perovskite solar cells
Hossain, M. K. et al. Design and simulation of CsPb.625Zn.375IBr2-based perovskite solar cells with different charge transport layers for efficiency enhancement. Sci. Rep. 14, 30142 (2024).
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