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The propagation of solar waves through the sunspot of AR 9787 is observed using temporal cross-correlations of SOHO/MDI Dopplergrams. We then use three-dimensional MHD numerical simulations to compute the propagation of wave packets through…

Astrophysics · Physics 2009-11-13 R. Cameron , L. Gizon , T. L. Duvall

Modern particle physics experiments usually rely on highly complex and large-scale spectrometer devices. In high energy physics experiments, visualization helps detector design, data quality monitoring, offline data processing, and has…

Data Analysis, Statistics and Probability · Physics 2024-07-08 Zhi-Jun Li , Ming-Kuan Yuan , Yun-Xuan Song , Yan-Gu Li , Jing-Shu Li , Sheng-Sen Sun , Xiao-Long Wang , Zheng-Yun You , Ya-Jun Mao

Recent progresses of electronics, essentially due to its miniaturization, are opening new fields that were just dreamed of, notably in astronomy. At start in paragraph 3, we introduce the time variation of images expressing the dual nature…

Instrumentation and Methods for Astrophysics · Physics 2023-03-14 E. Barrelet

Periodic signals in electrical and electronic equipment can cause interference in nearby devices. Randomized modulation of those signals spreads their energy through the frequency spectrum and can help to mitigate electromagnetic…

Quantum Physics · Physics 2014-11-27 Juan Carlos Garcia-Escartin

The dynamics of a traditional toy, the yoyo, is investigated theoretically and experimentally using smartphone' sensors. In particular, using the gyroscope the angular velocity is measured. The experimental results are complemented thanks…

Physics Education · Physics 2020-12-02 Isabel Salinas , Martin Monteiro , Arturo C. Marti , Juan A. Monsoriu

Control over the amplitude, phase, and spatial distribution of visible-spectrum light underlies many technologies, but commercial solutions remain bulky, require high control power, and are often too slow. Active integrated photonics for…

Optical interferometers increasingly use single-mode fibers as spatial filters to convert varying wavefront distortion into intensity fluctuations which can be monitored for accurate calibration of fringe amplitudes. Here I propose using an…

Astrophysics · Physics 2009-11-06 J. D. Monnier

The ability to modulate free electrons with light has emerged as a powerful tool to produce attosecond electron wavepackets. However, research has so far aimed at the manipulation of the longitudinal wave function component, while the…

Optics · Physics 2023-06-14 F. Javier García de Abajo , Claus Ropers

We show that when an electron or photon propagates in a cylindrically symmetric waveguide, its spin angular momentum (SAM) and its orbital angular momentum (OAM) interact. Remarkably, we find that the dynamics resulting from this spin-orbit…

Quantum Physics · Physics 2009-12-09 C. C. Leary , M. G. Raymer , S. J. van Enk

Sunquakes are one of the more distinct secondary phenomena related to solar flares, where energy deposition in the lower layers of the Sun's atmosphere excites acoustic waves easily visible in Helioseismic and Magnetic Imager (HMI)…

Solar and Stellar Astrophysics · Physics 2021-02-04 John T. Stefan , Alexander G. Kosovichev

We present two experiments that achieve phase super-resolution at telecommunication wavelengths. One of the experiments is realized in the space domain and the other in the time domain. Both experiments show high visibilities and are…

Quantum Physics · Physics 2011-01-18 Christian Kothe , Gunnar Björk , Mohamed Bourennane

I review the literature on observational aspects of waves in the solar chromosphere in the first part of this contribution. High-frequency waves are invoked to build elaborate cool-star chromosphere heating theories but have not been…

Solar and Stellar Astrophysics · Physics 2015-03-17 R. J. Rutten

Quantum dot sensitized solar cells are among the new generations of solar cells that have attracted much attention. Theoretical and simulation studies have predicted high efficiency for these cells so that in the future, these cells could…

Applied Physics · Physics 2020-07-17 Hossein Vahid Dastjerdi , Hamidreza Fallah , Morteza Hajimahmoodzadeh

We perform multiwavelength time-distance analysis of a fan loop system anchored in an isolated sunspot region AR 12553. The active region was observed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. We measure…

Solar and Stellar Astrophysics · Physics 2020-07-01 Aishawnnya Sharma , Durgesh Tripathi , Robertus Erdelyi , G. R. Gupta , G. A. Ahmed

A theory of photoluminescence in semiconductor quantum dots is developed which relies on two key ingredients. First, it takes into account non-adiabaticity of the exciton-phonon system. Second, it includes the multimode dielectric model of…

Mesoscale and Nanoscale Physics · Physics 2015-06-24 J. T. Devreese , V. M. Fomin , V. N. Gladilin , S. N. Klimin

We theoretically investigate the quantum scattering of a single-photon pulse interacting with an ensemble of $\Lambda$-type three-level atoms coupled to a one-dimensional waveguide. With an effective non-Hermitian Hamiltonian, we study the…

Quantum Physics · Physics 2017-11-08 Guo-Zhu Song , Ewan Munro , Wei Nie , Fu-Guo Deng , Guo-Jian Yang , Leong-Chuan Kwek

The sensors in modern smartphones are a promising and cost-effective tool for experimentation in physics education, but many experiments face practical problems. Often the phone is inaccessible during the experiment and the data usually…

Physics Education · Physics 2022-06-16 Sebastian Staacks , Simon Hütz , Heidrun Heinke , Christoph Stampfer

We observe effects of collective atomic motion in a one-dimensional optical lattice coupled to an optomechanical system. In this hybrid atom-optomechanical system, the lattice light generates a coupling between the lattice atoms as well as…

Quantum Physics · Physics 2018-02-27 Aline Vochezer , Tobias Kampschulte , Klemens Hammerer , Philipp Treutlein

Quantum correlations between bright pump, signal, and idler beams produced by an optical parametric oscillator, all with different frequencies, are experimentally demonstrated. We show that the degree of entanglement between signal and…

Quantum Physics · Physics 2009-11-13 K. N. Cassemiro , A. S. Villar , P. Valente , M. Martinelli , P. Nussenzveig

We investigate the mutiphoton process between different Bloch states in an amplitude modulated optical lattice. In the experiment, we perform the modulation with more than one frequency components, which includes a high degree of freedom…

Quantum Gases · Physics 2015-04-14 Linxiao Niu , Dong Hu , Shengjie Jin , Xiangyu Dong , Xuzong Chen , Xiaoji Zhou